WO2023124758A1 - 一种铆螺柱 - Google Patents

一种铆螺柱 Download PDF

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Publication number
WO2023124758A1
WO2023124758A1 PCT/CN2022/136083 CN2022136083W WO2023124758A1 WO 2023124758 A1 WO2023124758 A1 WO 2023124758A1 CN 2022136083 W CN2022136083 W CN 2022136083W WO 2023124758 A1 WO2023124758 A1 WO 2023124758A1
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WO
WIPO (PCT)
Prior art keywords
section
stud
unthreaded
threaded section
groove
Prior art date
Application number
PCT/CN2022/136083
Other languages
English (en)
French (fr)
Inventor
安名琮
徐二辉
Original Assignee
博尔豪夫(中国)紧固件有限公司
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Publication of WO2023124758A1 publication Critical patent/WO2023124758A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down

Definitions

  • the invention relates to the technical field of connectors, in particular to a rivet stud.
  • the sealing riveted stud in the prior art usually consists of a shell part and a bolt, wherein the shell part has a built-in through hole, and the bolt enters the inside of the shell part through the through hole of the shell part to cooperate with it, and the shell A flange is provided at the opening of the through hole of the part, and after the shell part is installed on the base material, the lower surface of the flange is flattened with the surface of the base material.
  • the present invention provides a riveting stud with a new structural design, which can not only ensure that the shell part and the stud bolt can maintain a stable structure before or after riveting, but also can Ensure the concentricity of the two.
  • a riveting stud which includes a shell part with a built-in through hole and a stud bolt, and the outer side wall of the shell part is circular or at least half the height It is hexagonal, one side of the stud bolt is screwed into the through hole and riveted, and the vertical central axis of the shell part coincides with the stud bolt;
  • the shell part includes a round hole section and an internal thread section arranged up and down, and a longitudinal through hole is formed in the round hole section and the internal thread section, and the stud bolt includes an upper thread section, a non-thread section from top to bottom and the lower threaded section, the stud bolts are sequentially screwed into the round hole section and the inner threaded section along with the lower threaded section, and the lower threaded section and the inner threaded section are engaged with each other and riveted so that the inner and outer threads are tightly combined;
  • the upper threaded section is located above the housing part.
  • the technical solution says that the upper threaded section is located above the shell parts, and it does not require that all the upper threaded sections are located above the shell parts, as long as part of the upper threaded section does not enter the through hole of the shell part and is exposed on the Except for shell parts, all belong to the category located above the shell parts.
  • the outer diameter of the unthreaded section is smaller than the inner diameter of the circular hole section.
  • the unthreaded section includes a primary unthreaded section and a secondary unthreaded section from top to bottom, and the outer diameter of the primary unthreaded section is not smaller than the outer diameter of the secondary unthreaded section.
  • the outer diameter of the first-stage unthreaded section is larger than the inner diameter of the circular hole section and the bottom is placed above the shell part.
  • the outer diameter of the secondary unthreaded section is smaller than the inner diameter of the circular hole section.
  • the end of the stud bolt away from the housing part is provided with a drive unit extending longitudinally.
  • the drive unit adopts a drive groove
  • the drive groove adopts a slot, a hexagon socket or a plum blossom groove.
  • the drive unit adopts a drive head
  • the drive head adopts an outer hexagon or an outer quincunx structure.
  • a rivet stud including a shell part and a stud bolt arranged coaxially with the shell part;
  • the housing part includes a body with a blind hole inside, a flange is provided at the opening of the blind hole of the body, and a circle of grooves under the head for accommodating an O-ring is provided on the lower surface of the flange;
  • the blind hole includes The round hole section and the internal thread section are arranged from top to bottom, and the diameter of the round hole section is not smaller than that of the internal thread section;
  • the stud bolt includes an upper threaded section, a non-threaded section and a lower threaded section coaxially arranged from top to bottom.
  • the shell parts adopt blind hole design, which avoids the leakage of liquid and gas from the bottom of the shell parts, and this design makes the surface of the bolts unnecessary to be glued, and the shell The parts and the bolts are in direct contact, so that the bolts are less likely to rotate relative to the housing parts; on the other hand, the lower surface of the flange is provided with a circle of grooves under the head to accommodate the O-ring, when the housing parts and the female After the material is installed by riveting, the two are sealed by an O-ring, so that the lower surface of the flange of the shell part can achieve the sealing requirement with the base material without glue coating, and because the shell part and the The parent metal is directly bonded, so the anti-rotation performance of the housing parts is also greatly improved.
  • an O-ring seal is embedded in the groove under the head.
  • the outer wall of the body part of the housing part is also provided with a ring-shaped groove, the ring-shaped groove is arranged close to the groove under the head, and an O-shaped sealing ring is installed in the ring-shaped groove, when the housing part and the parent material are riveted After installation, the O-ring on the annular groove is squeezed by the base material into the groove under the head.
  • the stud bolt further includes a dog tail, the dog tail is arranged at the bottom end of the stud bolt and the dog tail is in the shape of an inverted frustum of a cone.
  • the threads of the lower thread section are provided with vertical knurling.
  • the unthreaded section includes a secondary unthreaded section, the shape and outer diameter of the secondary unthreaded section are adapted to the shape and diameter of the round hole section, and after the lower threaded section is screwed to the internal threaded section, the second unthreaded section The threaded segment is located within the circular hole segment.
  • the shape and outer diameter of the secondary unthreaded section are adapted to the shape and diameter of the circular hole section, that is, the outer diameter of the secondary unthreaded section is only slightly smaller than or It is close to the inner diameter of the round hole section, so that the concentricity of the rivet stud after assembly and the concentricity of the blind rivet installed on the base metal can be guaranteed, and the upper threaded section of the stud exposed outside the shell part and the shell part can be guaranteed. Not partial.
  • the unthreaded section includes a primary unthreaded section and a secondary unthreaded section arranged from top to bottom, the outer diameter of the primary unthreaded section is larger than the diameter of the circular hole section, the lower threaded section and the internal thread After the sections are screwed, the first-stage unthreaded section fits on the upper surface of the shell part or has a slight gap with the upper surface of the shell part.
  • the first-stage unthreaded section cannot enter the blind hole because of its large outer diameter design, and can only be attached to the upper surface of the shell part or with the upper surface of the shell part. There is a slight gap, so that it plays a position-limiting role without eccentricity, and also ensures that the finished product after assembly will not loosen and fall out under the condition of vibration.
  • the upper end of the first-stage unthreaded section extends upwards to form a truncated cone with a slope, and the truncated cone is connected to the threaded section.
  • the upper threaded section of the stud bolt extends upwards to form a driving head
  • the driving head is an external hexagonal structure or an external torx structure.
  • the upper end of the upper threaded section of the stud bolt is inwardly recessed to form a driving groove, and the driving groove is a slot, a hexagon socket or a Torx groove.
  • the present invention has the following beneficial effects:
  • the housing parts contained in it adopt two basic structure designs, one is that the housing parts adopt the design of built-in through holes, and the other is that the housing parts adopt the design of built-in blind holes, whether it is Through-hole design or blind hole design, the shell parts are equipped with internal threads, the internal threads are used to cooperate with the external threads of the stud bolts, and combined with the riveting process, the shell parts and the stud bolts are tightly combined , At the same time, it also ensures that the finished product will not loosen and fall out, and the shell parts and the stud bolts are coaxially arranged, thereby avoiding the problem of eccentricity.
  • the stud bolt includes an upper threaded section, a non-threaded section and a lower threaded section from top to bottom, wherein the non-threaded section may include a threaded section whose outer diameter is only slightly smaller than the inner diameter of the round hole section of the shell part.
  • Secondary unthreaded section the design of the secondary unthreaded section can ensure the concentricity of the riveting stud after being riveted and the concentricity of the riveting after the riveting is installed on the base material, and ensure the upper threaded section of the stud exposed outside the shell part Not eccentric to housing parts.
  • the unthreaded section of the stud bolt can further include a first-level unthreaded section on the basis of the design of the second-level unthreaded section, and the outer diameter of the first-level unthreaded section is larger than that of the shell
  • the inner diameter of the round hole section of the part cannot enter the hole of the shell part due to the large outer diameter design, so it can only fit on the upper surface of the shell part or have a slight gap with the upper surface of the shell part, thus ensuring It plays the role of limit without eccentricity, and also ensures that the finished product after assembly will not loosen and fall out under the condition of vibration.
  • the housing parts can be designed with built-in blind holes, thereby avoiding the leakage of liquid and gas from the bottom of the housing parts, and can meet the sealing requirements of IPX7; and under this design, the surface of the bolts does not need to glue, shell parts and bolts are in direct contact, so that the bolts are less likely to rotate relative to the shell parts; further, in order to avoid liquid leakage between the lower surface of the flange of the shell parts and the base material, the present invention also Further, an O-shaped sealing ring is assembled on the lower surface of the flange of the shell part, thereby also canceling the use of sealant for the shell part, which not only greatly improves the process efficiency, but also reduces the process cost.
  • Fig. 1 is the structural representation about housing part among the present invention
  • Fig. 2 is the structural representation about the stud bolt with driving head in embodiment 1;
  • Fig. 3 is the structural schematic view of pairing the stud bolt with the driving head and the shell part in embodiment 1;
  • Fig. 4 is a schematic structural view of a stud bolt with a driving groove in embodiment 1;
  • Fig. 5 is a structural schematic diagram of pairing stud bolts with driving grooves and housing parts in Embodiment 1;
  • Fig. 6 is the structural representation about stud bolt in embodiment 2;
  • Fig. 7 is the structural representation of embodiment 2;
  • Fig. 8 is the structural representation about stud bolt in embodiment 3.
  • Fig. 9 is the structural representation of embodiment 3.
  • Fig. 10 is the structural representation of the rivet stud described in embodiment 5.
  • Fig. 11 is a schematic structural view of the housing parts in Embodiment 5.
  • Fig. 12 is the structural representation about stud bolt in embodiment 5.
  • Fig. 13 is a schematic structural view of the rivet stud described in embodiment 6;
  • Fig. 14 is a schematic structural view of the housing parts in Embodiment 6;
  • Fig. 15 is a schematic structural view of the rivet stud described in embodiment 7;
  • Fig. 16 is a schematic structural view of a stud bolt in Embodiment 7.
  • Figure 17 is a schematic structural view of the rivet stud described in Embodiment 8.
  • Fig. 18 is a schematic structural diagram of the stud bolts in Embodiment 8.
  • the figure shows:
  • the present invention designs the shell part 10 to be paired with the stud bolt 20 with threads at both upper and lower ends.
  • the rivet stud 100 proposed in the following first to fourth embodiments mainly includes a shell part 10 and a stud bolt 20 with a built-in through hole 17, as can be seen in accompanying drawings 1 to 9, which show The structural design and arrangement relationship of the shell parts 10 and the stud bolts 20;
  • the rivet studs 100 proposed in the following fifth to eighth embodiments mainly include the shell parts 10 and the stud bolts 20 with built-in blind holes 13, see Accompanying drawing 10 ⁇ 18, it has shown the structural design and arrangement relationship of shell part 10 and stud bolt 20.
  • the outer side walls of the housing part 10 in this embodiment can be all round or all regular polygons, or regular polygons at the upper end, circular side walls at the lower end or all round, through double One end of the stud bolt 20 is screwed into the through hole 17 and riveted to complete the fit.
  • the vertical central axes of the shell part 10 and the stud bolt 20 coincide.
  • the shell part 10 includes a circular hole section 131 and an internal thread section 132 arranged up and down, and a longitudinal through hole 17 is formed in the circular hole section 131 and the internal thread section 132, wherein in order to give The stud bolt 20 provides a convenient entrance.
  • the inner diameter of the round hole section 131 is larger than the inner diameter of the internal thread section 132 .
  • the stud bolt 20 is arranged to include an upper and lower threaded section 23, an unthreaded section 24 and a lower threaded section 25, wherein the upper threaded section 23 is the driving head end, and the lower threaded section
  • the segment 25 is engaged with the internal thread segment 132 of the shell part 10 and riveted together.
  • the outer diameter of the unthreaded segment 24 is smaller than the inner diameter of the round hole segment 131.
  • the upper and lower threads are the same size, such as M6, and the middle is slightly larger than the outer diameter of the thread, such as 6.0mm in diameter; 2.
  • the middle unthreaded section 24 it is also possible for the middle unthreaded section 24 to be smaller than the outer diameter of the thread , the size is equal to the size of the polished rod before rubbing, such as 5.30mm; 3, the size of the lower threaded section 25 can also be greater than the size of the upper threaded section 23, such as the upper thread M6, and the lower end thread M8.
  • the upper threaded section 23 is located above the housing part 10 (note: the so-called upper threaded section 23 is located above the housing part 10 here, It is not required that the upper threaded section 23 is all located above the shell part 10, as long as some of the upper threaded section 23 does not enter the through hole 17 of the shell part 10 and is exposed outside the shell part 10, it is located on the shell part 10. category above), and the threadless section 24 also gradually enters the round hole section 11.
  • a drive unit extending longitudinally is provided at the end of the stud bolt 20 away from the shell part 10, preferably, a longitudinally extending
  • the extension may be a drive unit that extends upward and protrudes, or a drive unit that extends downward and inwardly toward the body of the stud bolt 20 .
  • the drive unit adopts a drive slot 22 of a straight groove or an inner hexagonal slot or an inner torx groove, or a drive head 21 with an outer hexagon or an outer torx structure; whether it is through the drive slot 22 or the drive head 21, the stud bolt 10 can be screwed into the shell part 20 conveniently, stably and accurately, reducing the probability of slipping teeth and defective products, and also facilitating the riveting process after being screwed into the shell later.
  • the stud bolt 20 Since the stud bolt 20 is screwed in from the inner hole of the flange end of the shell part 10, the problem of the exposed thread of the stud bolt 20 and the non-eccentricity of the shell part 10 is solved. As shown in FIGS. On the basis of Embodiment 1, the diameter of the unthreaded part in the middle of the stud bolt 20 is made close to the large hole size of the shell part, especially when the bolt is relatively long, the effect is better.
  • the preferred solution of this embodiment is to design the outer diameter of the unthreaded section 24 of the stud bolt 20 to be greater than the outer diameters of the upper threaded section 23 and the lower threaded section 25, and the outer diameter of the unthreaded section 24 It is designed to be slightly smaller than the inner diameter of the circular hole section 131, and the gap between the two is reduced, which can ensure that the rivet after installation will not be eccentric.
  • the length of the stud bolt 20 is usually longer than that of ordinary bolts.
  • the exposed thread of the head bolt 20 and the problem of non-eccentricity and position limitation of the housing part 10 provide a more effective solution.
  • the non-threaded section 24 is arranged to have two structures of upper and lower.
  • the unthreaded section 24 is arranged to include a primary unthreaded section 242 and a secondary unthreaded section 241 from top to bottom, and the outer diameter of the primary unthreaded section 242 is not only larger than
  • the outer diameter of the secondary unthreaded section 241 is also larger than the inner diameter of the round hole section 131 of the shell part 10, and it is designed so that during the process of screwing the stud bolt 20 into the shell part 10, the primary unthreaded section 242 is Blocking the upper surface of the shell part 10 can play a position-limiting role without eccentricity, and also ensures that the finished product after assembly will not loosen and fall out under the condition of vibration.
  • the top of the first-stage unthreaded section 242 also extends upward around the stud bolt 20 to form a frustum 243 with a slope.
  • first-level unthreaded section 242 is exposed outside and is placed flat against the top of the upper surface of the shell part 10 or with a slight gap, and the outer diameter of the first-level unthreaded section 242 and the size of the opening on the plate for the lock are arranged Into a similar size, easy to pre-position the plate against the lock.
  • this embodiment provides a riveting stud 100 .
  • the overall structure of the riveting stud 100 is shown in FIG. 10 . Stud bolts 20.
  • the housing part 10 includes a body 11 with a blind hole 13 inside.
  • the shape of the body 11 can be circular, or a regular polygon, or the upper end is a regular polygon, and the lower end is a circle. A selection actually needs to be made.
  • the opening of the blind hole 13 of the body 11 is provided with a flange 12, and the lower surface of the flange 12 is provided with a circle of underhead groove 14, and an O-shaped sealing ring 16 is embedded in the underhead groove 14 (note: the figure in this embodiment The O-ring seal 16 is not shown), when the housing part 10 and the base material are installed by riveting, the lower surface of the flange 12 of the housing part 10 is flat against the surface of the base material, and the distance between the two is due to the There is an O-ring 16 to realize sealing requirements.
  • the blind hole 13 includes a round hole section 131 and an internal thread section 132 arranged from top to bottom. Blind holes 13 into the housing part 10 provide easier access.
  • the stud bolt 20 includes an upper threaded section 23 , an unthreaded section 24 , and a lower threaded section 25 integrally arranged coaxially from top to bottom.
  • the stud bolt 20 takes the end of the stud bolt 20 away from the shell part 10 as the driving head end, and gradually screw the lower threaded section 25 into the blind hole 13 of the shell part 10 so that it is screwed with the internal threaded section 132 of the blind hole 13 , and then the outer diameter of the body of the lower threaded section 25 is deformed through the riveting process, thereby causing the corresponding deformation of the internal threaded section 132 of the shell part 10, thereby making the lower threaded section 25 and the internal threaded section 132 tightly combined, thereby ensuring
  • the stud bolt 20 and the shell part 10 will not slide, rotate and loosen relative to each other, and this embodiment also provides vertical knurling on the thread of the lower threaded section 25, thereby further ensuring that the stud bolt 20 and the shell There
  • the non-threaded section 24 of the stud bolt 20 all enters into the circular hole section 131 .
  • the length of the stud bolt 20 is longer than that of ordinary bolts, in order to ensure the concentricity of the riveting stud 100 after the pressure riveting assembly and the concentricity of the riveting after the riveting is installed on the base material, it is ensured that the stud bolt 20 is exposed on the shell part 10
  • the outer upper threaded section 23 is not eccentric to the shell part 10.
  • the structure of the stud bolt 20 is specially designed so that the diameter of the unthreaded section 24 inside the circular hole section 131 where the stud bolt 20 enters is close to a circle.
  • the design of the inner diameter of the hole section 131 has obvious beneficial effects, especially in the case of relatively long stud bolts 20 . specifically:
  • the stud bolt 20 includes an upper threaded section 23, an unthreaded section 24 and a lower threaded section 25 coaxially arranged from top to bottom, wherein the unthreaded section 24 includes two threaded sections connected with the lower threaded section 25.
  • the second-stage unthreaded section 241, the outer diameter of the second-stage unthreaded section 241 is larger than the lower threaded section 25, but slightly smaller than the inner diameter of the round hole section 131.
  • the secondary unthreaded section 241 gradually enters into the circular hole section 131 .
  • the shape and outer diameter of the secondary unthreaded section 241 are adapted to the shape and inner diameter of the circular hole section 131, the gap between the outer surface of the secondary unthreaded section 241 and the inner surface of the circular hole section 131 is very small, thus Ensure that the pressure riveting after the stud bolt 20 is screwed into the shell part 10 will not cause eccentricity, and also ensure that the subsequent riveting will not cause eccentricity, and ensure the concentricity of the riveting stud 100 after pressure riveting and riveting .
  • a driving unit is provided on the upper end of the upper threaded section 23 of the stud bolt 20.
  • the driving unit is a driving head 21 formed by extending the upper threaded section 23 upwards.
  • the driving head 21 is coaxial with the upper threaded section 23, the non-threaded section 24 and the lower threaded section 25.
  • the driving head 21 adopts an outer hexagonal structure or an outer quincunx structure, so that the driving head 21 can conveniently, stably and accurately drive the two
  • the head screw 20 is screwed into the blind hole 13 of the housing part 10 .
  • the bottom of the stud bolt 20 is also designed with an inverted cone-shaped dog tail 16 . The design of the dog tail 16 makes it easier for the stud bolt 20 to enter the housing part 10 Inside the blind hole 13.
  • the rivet stud 100 provided in this embodiment adopts a blind hole design for the shell part 10, thereby preventing liquid and gas from flowing from the bottom of the shell part 10. Leakage can meet the sealing requirements of IPX7; and under this design, the surface of the stud bolt 20 does not need to be glued. After assembly, the shell part 10 and the stud bolt 20 are in direct contact, making it more difficult for the stud bolt 20 to move against the shell. Part 10 rotates.
  • an underhead groove 14 is provided on the lower surface of the flange 12 of the shell part 10 to assemble the O-ring seal 16, thereby realizing that the shell part 10 is installed on the base material by riveting
  • the sealing requirements between the base materials, and under this design, the lower surface of the flange 12 of the housing part 10 does not need to be glued.
  • the housing part 10 and the base material are in direct contact, making the housing part 10 more secure It is easy to rotate relative to the base metal.
  • this embodiment provides a riveting stud 100, the structure of which is substantially the same as that of the riveting stud 100 described in the fifth embodiment, both including shell parts 10 and
  • the stud bolt 20 arranged coaxially with the shell part 10 differs in that, in the rivet stud 100 provided by the fifth embodiment, the O-ring seal 16 is directly assembled in the groove 14 under the head of the lower surface of the flange 12, which As a result, the O-ring 16 may slip and fall during transportation, loading, and automatic riveting, which may affect the sealing performance between the shell part 10 and the base material after riveting, and reduce the product yield .
  • this embodiment further designs the structure of the shell part 10, specifically:
  • the lower surface of the flange 12 of the housing part 10 is provided with a ring groove 14, and the outer wall of the body 11 of the housing part 10 is also provided with a ring groove 15, and the ring groove 15 is close to
  • the groove 14 under the head is set, and the O-ring seal 16 is embedded in the annular groove 15 ( Figure 14 shows the state that the O-ring 16 has not been assembled in the annular groove 15), and the shell part 10 is riveted and installed on the female After the material is formed, the O-ring 16 on the annular groove 15 is squeezed into the groove 14 under the head by the base material.
  • This embodiment utilizes the design of the annular groove 15 to achieve the situation that the O-shaped sealing ring 16 will not fall off or be misplaced during transportation, storage and riveting, thus ensuring the sealing between the shell part 10 and the base material performance.
  • this embodiment provides a riveting stud 100, the structure of which is substantially the same as that of the riveting stud 100 described in the fifth embodiment, both including a shell part 10 and
  • the difference between the stud bolts 20 arranged coaxially with the shell part 10 is that, as mentioned above, the length of the stud bolts 20 is longer than that of ordinary bolts.
  • this embodiment further designs the structure of the stud bolt 20, specifically:
  • the unthreaded section 24 of the stud bolt 20 includes a first-level unthreaded section 242 and a secondary unthreaded section 241 arranged from top to bottom, wherein the second-level unthreaded section 241 is connected to the lower threaded section 25 , the shape of the secondary unthreaded section 241 is adapted to the shape of the circular hole section 131, and the outer diameter of the secondary unthreaded section 241 is adapted to the aperture diameter of the circular hole section 131, while the outer diameter of the primary unthreaded section 242 is larger than The diameter of the circular hole section 131.
  • the secondary unthreaded section 241 is located in the round hole section 131 of the blind hole 13 and the primary unthreaded section 242 is located on the upper surface of the shell part 10 and is connected to the upper surface of the shell part 10.
  • the surface is flat or there is a slight gap, so that the first-level non-threaded section 242 can play a position-limiting role without eccentricity, and ensure that the finished product after assembly will not loosen and loosen under the condition of vibration. drop.
  • the outer diameter of the first-level unthreaded section 242 in this embodiment The size of the opening on the plate of the lock is arranged to be similar in size, and the upper end of the first-level unthreaded section 242 extends upwards to form a frustum 243 with an inclined surface, and the frustum 243 is connected to the threaded section 23 .
  • this embodiment provides a riveting stud 100, the structure of which is substantially the same as that of the riveting stud 100 described in the fifth embodiment, both including a shell part 10 and
  • the stud bolt 20 arranged coaxially with the shell part 10 mainly differs in that the upper end of the threaded section 23 on the stud bolt 20 in Embodiment 5 is provided with an upwardly extending drive head 21 as a drive unit, as shown in Figures 17 and 18
  • the upper end of the upper threaded section 23 is recessed inwardly to form a driving groove 22 as a driving unit.
  • the driving groove 22 is a straight groove or an inner hexagonal groove or an inner plum blossom groove. coaxial.
  • the outer diameters of the upper threaded section 23 , the unthreaded section 24 , and the lower threaded section 25 of the stud bolt 20 are the same.
  • the upper threaded section 23 , the outer diameters of the unthreaded section 24 and the lower threaded section 25 have no strict size requirements, and can be the same size design as shown in this embodiment, or the upper threaded section 23, as shown in embodiment 5.
  • Lower threaded section 25 is equal to the design that the non-threaded section 24 in the middle is slightly larger than the upper threaded section 23 and the lower threaded section 25.
  • the upper threaded section 23 and the lower threaded section 25 can also adopt unequal designs, such as Make the lower threaded section 25 larger than the upper threaded section 23, the user can choose according to actual needs.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
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Abstract

一种铆螺柱，包括内置贯穿通孔（17）的壳体零件（10）和双头螺栓（20），壳体零件的外侧壁为圆形或至少一半的高度呈六边形，双头螺栓的一侧旋入通孔内并压铆，壳体零件和双头螺栓的竖直中心轴重合；壳体零件包括上下设置的圆孔段（131）和内螺纹段（132），且通孔在圆孔段和内螺纹段内纵向形成，双头螺栓从上至下包括上螺纹段（23）、无螺纹段（24）和下螺纹段（25），双头螺栓随着下螺纹段依次旋入圆孔段和内螺纹段，下螺纹段与内螺纹段相互啮合并压铆；上螺纹段位于壳体零件上方。这种铆螺柱保证成品以及拉铆安装之后不会松脱和掉出，解决了铆螺柱拉铆之后的偏心问题，特别在长螺栓的情况下效果更好。

Description

一种铆螺柱 技术领域
本发明涉及连接件技术领域，具体地，涉及一种铆螺柱。
背景技术
现在汽车行业特别是电动汽车的电池包上会大量使用到密封铆螺母,在一些不便于装配或大件需要悬挂的地方也会有使用密封铆接螺柱的需求。现有技术中的密封铆接螺柱通常由一个壳体零件和一个螺栓组成，其中，壳体零件内置贯穿通孔，螺栓通过壳体零件的通孔进入壳体零件内部从而与之配合，壳体零件的通孔开口位置处设置有法兰，壳体零件安装于母材后，法兰下表面与母材表面贴平。
现有的部分密封铆接螺柱，其壳体零件内未设置内螺纹，壳体零件和螺栓通过压铆装配在一起，但存在安装时无法保证螺栓垂直度以及二者压铆不紧会出现晃动的问题；而另有部分密封铆接螺柱，壳体零件设置有内螺纹，内螺纹和螺栓上的外螺纹匹配，将螺栓旋入壳体零件后一般也会进行压铆，防止螺栓退出，但在使用中会产生偏心或者安装移位的情况。
发明内容
针对现有技术中的缺陷，本发明提供一种采用新型结构设计的铆螺柱，不仅可保证壳体零件和双头螺栓之间无论是拉铆前或后都能够保持稳定的结构，且能够确保二者的同心度。
为实现上述发明目的，根据本发明的一个方面，提供一种铆螺柱，包括内置贯穿通孔的壳体零件和双头螺栓，所述壳体零件的外侧壁为圆形或至少一半的高度呈六边形，所述双头螺栓的一侧旋入通孔内并压铆，所述壳体零件和双头螺栓的竖直中心轴重合；
所述壳体零件包括上下设置的圆孔段和内螺纹段，且在圆孔段和内螺纹段内形成纵向的通孔，所述双头螺栓从上至下包括上螺纹段、无螺纹段和下螺纹段，所述双头螺栓随着下螺纹段依次旋入圆孔段和内螺纹段，所述下螺纹段与内螺纹段相互 啮合并压铆使内外螺纹紧密结合；
所述上螺纹段位于壳体零件上方。
须特别说明的是，本技术方案所谓上螺纹段位于壳体零件上方，并不要求上螺纹段全部位于壳体零件上方，只要上螺纹段有部分未进入壳体零件的通孔内而裸露在壳体零件之外，均属位于壳体零件上方的范畴。
优选地，所述无螺纹段的外径小于圆孔段的内径。
优选地，所述无螺纹段从上至下包括一级无螺纹段和二级无螺纹段，所述一级无螺纹段的外径不小于二级无螺纹段的外径。
优选地，所述一级无螺纹段的外径大于圆孔段的内径且底部置于壳体零件上方。
优选地，所述二级无螺纹段外径小于圆孔段的内径。
优选地，所述双头螺栓远离壳体零件的一端设置有向纵向延伸的驱动单元。
优选地，所述驱动单元采用驱动槽，所述驱动槽采用一字槽或内六角槽或内梅花槽。
优选地，所述驱动单元采用驱动头，所述驱动头采用外六角或外梅花结构。
根据本发明的另一个方面，提供一种铆螺柱，包括壳体零件和与壳体零件同轴配置的双头螺栓；
所述壳体零件包括内设盲孔的本体，本体的盲孔开口处设置有法兰，法兰的下表面设置有一圈用以容纳O形密封圈的头下凹槽；所述盲孔包括自上而下设置的圆孔段和内螺纹段，圆孔段的孔径不小于内螺纹段的孔径；
所述双头螺栓包括自上而下一体同轴设置的上螺纹段、无螺纹段和下螺纹段，所述双头螺栓与壳体零件装配后，下螺纹段与壳体零件的内螺纹段螺接并经压铆紧密结合，无螺纹段全部或部分位于壳体零件的圆孔段内。
本技术方案中，通过采用以上所述结构设计，一方面，壳体零件采用盲孔设计，避免了液体以及气体从壳体零件的底部泄露，并且，此设计使得螺栓表面无须涂胶，壳体零件和螺栓直接接触，使得螺栓更加不容易相对于壳体零件发生转动；另一方面，法兰的下表面设置有一圈用以容纳O形密封圈的头下凹槽，当壳体零件与母材通过拉铆安装后，二者之间通过O形密封圈密封，由此使得壳体零件的法兰下表面无须涂胶即可实现与母材之间的密封要求，且因壳体零件与母材直接贴合，因此还大大提升了壳体零件的防转动性能。
优选地，所述头下凹槽内嵌入式装配有O形密封圈。
本技术方案中，通过采用以上所述结构设计，在头下凹槽内直接装配O形密封圈，结构设计简单，保证了壳体零件与母材通过拉铆安装后的密封要求。
优选地，所述壳体零件的本体外壁还设置有一圈环形凹槽，环形凹槽靠近头下凹槽设置，环形凹槽内装配有O形密封圈，当壳体零件与母材通过拉铆安装后，环形凹槽上的O形密封圈被母材挤压卡入头下凹槽。
本技术方案中，通过采用以上所述结构设计，避免了O形密封圈在运输、上料以及壳体零件安装过程中可能出现的滑动和掉落的情况，此设计使得壳体零件在拉铆安装于母材后，O形密封圈能够在母材的挤压下从环形凹槽卡入头下凹槽，从而避免壳体零件法兰的下表面与母材之间因存在间隙而出现液体的泄露。
优选地，所述双头螺栓还包括狗尾，狗尾设置于双头螺栓的底端且狗尾呈倒置的圆台状。
本技术方案中，通过采用以上所述狗尾的结构设计，使得双头螺栓更容易进入壳体零件的盲孔内。
优选地，所述下螺纹段的螺纹上设置有竖纹滚花。
本技术方案中，通过采用以上所述竖纹滚花的结构设计，能够保证双头螺栓和壳体零件在压铆后不会发生相对转动以及不会发生上下移动。
优选地，所述无螺纹段包括二级无螺纹段，二级无螺纹段的形状、外径与圆孔段的形状、孔径适配，下螺纹段与内螺纹段螺接后，二级无螺纹段位于圆孔段内。
本技术方案中，通过采用以上所述结构设计，使二级无螺纹段的形状、外径与圆孔段的形状、孔径适配，即二级无螺纹段的外径仅是略小于或说接近于圆孔段的内径，由此能够保证铆螺柱装配后的同心度以及拉铆安装于母材后的同心度，保证双头螺栓露在壳体零件外面的上螺纹段与壳体零件不偏心。
优选地，所述无螺纹段包括自上而下设置的一级无螺纹段和二级无螺纹段，所述一级无螺纹段的外径大于圆孔段的孔径，下螺纹段与内螺纹段螺接后，一级无螺纹段贴合于壳体零件的上表面或与壳体零件上表面稍具间隙。
本技术方案中，通过采用以上所述结构设计，一级无螺纹段因其较大的外径设计无法进入盲孔内而只能贴合于壳体零件的上表面或与壳体零件上表面稍具间隙，由此在保证不偏心的情况下起到限位的作用，且也保证了装配之后的成品在有振动的情况下也不会松脱和掉出。
优选地，所述一级无螺纹段的上端向上延伸形成具有斜面的锥台，锥台上接上 螺纹段。
本技术方案中，通过采用以上所述锥台的结构设计，便于后续和其他零件装配的时候起到预定位和导向的作用。
优选地，所述双头螺栓的上螺纹段向上延伸形成驱动头，所述驱动头为外六角结构或外梅花结构。
优选地，所述双头螺栓的上螺纹段的上端部向内凹陷形成驱动槽，所述驱动槽为一字槽或内六角槽或内梅花槽。
与现有技术相比，本发明具有如下的有益效果：
1、本发明提供的铆螺柱，其所包含的壳体零件采用两种基础结构设计，其一是壳体零件采用内置通孔设计，其二是壳体零件采用内置盲孔设计，无论是通孔设计还是盲孔设计，壳体零件内均设置有内螺纹，内螺纹用于与双头螺栓的外螺纹配合，再结合压铆工艺，起到壳体零件和双头螺栓紧密结合的目的，同时也保证成品不会松脱和掉出，并且，壳体零件和双头螺栓同轴配置，由此避免偏心问题。
2、本发明提供的铆螺柱，双头螺栓从上至下包括上螺纹段、无螺纹段和下螺纹段，其中，无螺纹段可包括外径仅略小于壳体零件圆孔段内径的二级无螺纹段，二级无螺纹段的设计能够保证铆螺柱压铆后的同心度以及拉铆安装于母材后的同心度，保证双头螺栓露在壳体零件外面的上螺纹段与壳体零件不偏心。
3、本发明提供的铆螺柱，双头螺栓的无螺纹段在设计有二级无螺纹段的基础上，还可进一步包括一级无螺纹段，一级无螺纹段的外径大于壳体零件圆孔段的内径，其因较大的外径设计无法进入壳体零件的孔内而只能贴合于壳体零件的上表面或与壳体零件上表面稍具间隙，由此在保证不偏心的情况下起到限位的作用，且也保证了装配之后的成品在有振动的情况下也不会松脱和掉出。
4、本发明提供的铆螺柱，壳体零件可采用内置盲孔设计，由此避免了液体以及气体从壳体零件的底部泄露，可以满足IPX7的密封要求；并且此设计下，螺栓表面无须涂胶，壳体零件和螺栓直接接触，使得螺栓更加不容易相对于壳体零件发生转动；进一步地，为避免壳体零件的法兰下表面与母材之间发生液体的泄露，本发明还进一步在壳体零件的法兰下表面装配O形密封圈，由此也取消了壳体零件对密封胶的使用，不仅大大提高工艺效率，还降低工艺成本。
附图说明
通过阅读参照以下附图对非限制性实施例所作的详细描述，本发明的其它特征、目的和优点将会变得更明显：
图1为本发明中关于壳体零件的结构示意图；
图2为实施例1中关于具有驱动头的双头螺栓的结构示意图；
图3为实施例1中对配具有驱动头的双头螺栓和壳体零件的结构示意图；
图4为实施例1中关于具有驱动槽的双头螺栓的结构示意图；
图5为实施例1中对配具有驱动槽的双头螺栓和壳体零件的结构示意图；
图6为实施例2中关于双头螺栓的结构示意图；
图7为实施例2的结构示意图；
图8为实施例3中关于双头螺栓的结构示意图；
图9为实施例3的结构示意图；
图10为实施例5所述铆螺柱的结构示意图；
图11为实施例5中关于壳体零件的结构示意图；
图12为实施例5中关于双头螺栓的结构示意图；
图13为实施例6所述铆螺柱的结构示意图；
图14为实施例6中关于壳体零件的结构示意图；
图15为实施例7所述铆螺柱的结构示意图；
图16为实施例7中关于双头螺栓的结构示意图；
图17为实施例8所述铆螺柱的结构示意图；
图18为实施例8中关于双头螺栓的结构示意图。
图中示出：
100-铆螺柱；
10-壳体零件；
11-本体；
12-法兰；
13-盲孔；
131-圆孔段；
132-内螺纹段；
14-头下凹槽；
15-环形凹槽；
16-O形密封圈；
17-通孔；
20-双头螺栓；
21-驱动头；
22-驱动槽；
23-上螺纹段；
24-无螺纹段；
241-二级无螺纹段；
242-一级无螺纹段；
243-锥台；
25-下螺纹段；
26-狗尾
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。此外，本申请中所有方向性指示(诸如上、下、左、右、前、后、底…)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
为了获得壳体零件10和双头螺栓20之间无论是拉铆前或后都能够稳定的结构，本发明设计了壳体零件10与上下两端都具有螺纹的双头螺栓20进行对配。具体地，以下第1实施例至第4实施例提出的铆螺柱100，主要包括内置贯穿通孔17的壳体零件10 和双头螺栓20，可参见附图1～9，其示出了壳体零件10和双头螺栓20的结构设计和布置关系；以下第5至第8实施例提出的铆螺柱100，主要包括内置盲孔13的壳体零件10和双头螺栓20，可参见附图10～18，其示出了壳体零件10和双头螺栓20的结构设计和布置关系。
第1实施例
如附图1～5所示可知，本实施例中壳体零件10的外侧壁可以是全部呈圆形或全部呈正多边形，或上端正多边形，下端圆形侧壁或全部呈圆形，通过双头螺栓20的一端旋入通孔17内并压铆完成配合，为了保证不偏心，其中壳体零件10和双头螺栓20的竖直中心轴是重合的。
具体地，如图1所示，壳体零件10包括上下设置的圆孔段131和内螺纹段132，且在圆孔段131和内螺纹段132内形成纵向的通孔17，其中为了能够给双头螺栓20提供便捷的入口，在本实施例中优选的，圆孔段131的内径大于内螺纹段132的内径。
在本实施例中，如图2所示，双头螺栓20布置成包含上螺纹段23、无螺纹段24和下螺纹段25上下三段结构，其中上螺纹段23是驱动头端，下螺纹段25与壳体零件10的内螺纹段132相互啮合并压铆在一起，在本实施例中，无螺纹段24的外径小于圆孔段131的内径，进一步的，根据图4示出的双头螺栓10结构,分三种情况:
1、一般情况下,上下螺纹一样大比如M6,中间比螺纹外径稍微大一点比如直径6.0mm；2、在其他的一些实施例中,中间的无螺纹段24比螺纹外径小也是可以的,尺寸等于搓牙之前的光杆尺寸比如5.30mm；3、也可以下螺纹段25大于上螺纹段23的尺寸,比如上段螺纹M6,下端螺纹M8。
在随着下螺纹段25依次旋入圆孔段131和内螺纹段132的过程中，上螺纹段23位于壳体零件10上方(注：此处所谓上螺纹段23位于壳体零件10上方，并不要求上螺纹段23全部位于壳体零件10上方，只要上螺纹段23有部分未进入壳体零件10的通孔17内而裸露在壳体零件10之外，均属位于壳体零件10上方的范畴)，而无螺纹段24也逐渐进入圆孔段11。
此外，如前文所述，为了可以方便的驱动双头螺栓20，在本实施例中优选的，在双头螺栓20远离壳体零件10的一端设置有向纵向延伸的驱动单元，优选的，纵向延伸可以是向上延伸突出的驱动单元，也可以是向双头螺栓20本体向下内部延伸凹入的驱动单元。
在本实施例中优选的，驱动单元采用一字槽或内六角槽或内梅花槽的驱动槽22或 者是外形成外六角或外梅花结构的驱动头21；无论是通过驱动槽22或者驱动头21，均可以方便、稳定、精准的将双头螺栓10旋入壳体零件20，降低滑齿、不良品的概率，也利于后期在旋入壳体后的压铆工序。
第2实施例
由于双头螺栓20是从壳体零件10的法兰端的内孔旋入，解决双头螺栓20露在外面的螺纹和壳体零件10不偏心的问题，如图6～7所示可知，在实施例1的基础上，将双头螺栓20中间无螺纹的部分直径做到接近壳体零件的大孔尺寸，特别是在螺栓比较长的情况下效果更好。在实施例1的基础上，本实施例优选的方案是将双头螺栓20的无螺纹段24外径设计成大于上螺纹段23和下螺纹段25的外径，无螺纹段24的外径设计成略小于圆孔段131的内径，两者之间间隙减小，可以保证安装之后的拉铆不会产生偏心的情况。
第3实施例
如图8～9所示可知，通常双头螺栓20的长度比一般的螺栓要长，为了保证铆螺柱100装配之后以及铆螺柱100在客户端拉铆之后的同心度，为了进一步解决双头螺栓20露在外面的螺纹和壳体零件10不偏心和限位的问题，提供更加有效的解决方案，在本实施例中，将无螺纹段24布置成具有上下两种结构的方案。
具体的，在实施例2的基础上，将无螺纹段24布置成从上至下包括一级无螺纹段242和二级无螺纹段241，所述一级无螺纹段242的外径不光大于二级无螺纹段241的外径，还大于壳体零件10的圆孔段131的内径，此处设计使得将双头螺栓20旋入壳体零件10的过程中，一级无螺纹段242被挡在壳体零件10上表面，在保证不偏心的情况下能够起到限位的作用，也保证了装配之后的成品在有振动的情况下也不会松脱和掉出。
第4实施例
如图8～9所示可知，为了方便后续和其他零件装配的时候起到预定位和导向的作用，使铆螺柱100更容易的进入对锁的板材开孔内，可以在实施例3的基础上，一级无螺纹段242的上方还围绕双头螺栓20向上延伸形成具有斜面的锥台243。
进一步的，一级无螺纹段242露在外面且和壳体零件10上表面顶部贴平或略有间隙设置,将一级无螺纹段242的外径和对锁的板材上的开孔尺寸布置成相近的大小,便于预定位对锁的板材。
第5实施例
如图10至图12所示，本实施例提供一种铆螺柱100，该铆螺柱100的整体结构如 图10所示，其包括壳体零件10和与壳体零件10同轴配置的双头螺栓20。
其中，如图11所示，壳体零件10包括内设盲孔13的本体11，本体11的外形可为圆形，或正多边形，或上端为正多边形，下端为圆形，使用者可根据实际需要进行选择。本体11的盲孔13开口处设置有法兰12，法兰12下表面设置有一圈头下凹槽14，头下凹槽14内嵌入式装配有O形密封圈16(注：本实施例图示未示出O形密封圈16)，当壳体零件10与母材通过拉铆安装后，壳体零件10的法兰12的下表面与母材表面贴平，且二者之间因设置有O形密封圈16而实现密封要求。进一步地，盲孔13包括自上而下设置的圆孔段131和内螺纹段132，本实施例中，圆孔段131的孔径大于内螺纹段132的孔径，由此为双头螺栓20旋入壳体零件10的盲孔13提供更便捷的入口。
如图12所示，双头螺栓20包括自上而下一体同轴设置的上螺纹段23、无螺纹段24、以及下螺纹段25。装配时，以双头螺栓20远离壳体零件10的一端为驱动头端，将下螺纹段25逐渐旋入壳体零件10的盲孔13内使之与盲孔13的内螺纹段132螺接，而后通过压铆工序使下螺纹段25的身体外径变形，从而导致壳体零件10的内螺纹段132也相应的变形，由此使得下螺纹段25和内螺纹段132紧密结合，从而确保双头螺栓20和壳体零件10不会出现相对的滑动、转动以及松动，并且，本实施例还在下螺纹段25的螺纹上设置竖纹滚花，由此进一步保证双头螺栓20和壳体零件10之间不会发生相对转动以及不会发生上下移动。
本实施例中，双头螺栓20的下螺纹段25旋入壳体零件10的内螺纹段132从而与之螺接后，双头螺栓20的无螺纹段24全部进入圆孔段131内。鉴于双头螺栓20的长度比一般的螺栓要长，为了保证铆螺柱100压铆装配后的同心度以及拉铆安装于母材后的同心度，保证双头螺栓20露在壳体零件10外面的上螺纹段23与壳体零件10不偏心，本实施例对双头螺栓20的结构进行了特殊设计，使双头螺栓20进入圆孔段131内部的无螺纹段24直径做到接近圆孔段131的内径，该设计特别是在双头螺栓20比较长的情况下具备明显的有益效果。具体地：
如图12所示，双头螺栓20包括自上而下一体同轴设置的上螺纹段23、无螺纹段24和下螺纹段25，其中，无螺纹段24包括与下螺纹段25连接的二级无螺纹段241，二级无螺纹段241的外径大于下螺纹段25，但略小于圆孔段131的内径。由此使得，在下螺纹段25旋入内螺纹段132的过程中，二级无螺纹段241逐渐进入圆孔段131内。因二级无螺纹段241的形状、外径与圆孔段131的形状、内径适配，二级无螺纹段241的外表面与圆孔段131的内表面之间的间隙很小，由此保证双头螺栓20旋入壳体零件10 之后的压铆不会产生偏心的情况，且也保证后续的拉铆不会产生偏心的情况，确保铆螺柱100压铆及拉铆后的同心度。
进一步地，为便于驱动双头螺栓20，如图12所示，本实施例在双头螺栓20上螺纹段23的上端设置驱动单元，驱动单元为上螺纹段23向上延伸形成的驱动头21，驱动头21与上螺纹段23、无螺纹段24和下螺纹段25一体同轴，驱动头21采用外六角结构或外梅花结构，由此可通过驱动头21，方便、稳定、精准的将双头螺栓20旋入壳体零件10的盲孔13内部。此外，如图12所示，本实施例中，双头螺栓20的底部还设计有呈倒置的圆台状的狗尾16，狗尾16的设计使得双头螺栓20更容易进入壳体零件10的盲孔13内。
本实施例提供的铆螺柱100，相较于实施例1～实施例4提供的铆螺柱100，壳体零件10采用盲孔设计，由此避免了液体以及气体从壳体零件10的底部泄露，可以满足IPX7的密封要求；并且此设计下，双头螺栓20表面无须涂胶，装配后，壳体零件10和双头螺栓20直接接触，使得双头螺栓20更加不容易相对于壳体零件10发生转动。与此同时，本实施例在壳体零件10的法兰12的下表面设置头下凹槽14以装配O形密封圈16，由此实现了壳体零件10经拉铆安装于母材后与母材之间的密封要求，并且此设计下，壳体零件10的法兰12的下表面亦是无须涂胶，装配后，壳体零件10和母材直接接触，使得壳体零件10更加不容易相对于母材发生转动。
第6实施例
如图13～14所示，本实施例提供一种铆螺柱100，该铆螺柱100的结构与第5实施例所述的铆螺柱100的结构大体相同，均包括壳体零件10和与壳体零件10同轴配置的双头螺栓20，区别在于，第5实施例提供的铆螺柱100，O形密封圈16直接装配于法兰12下表面的头下凹槽14内，这使得在运输、上料、自动化拉铆过程中可能出现O型密封圈16滑动和掉落的情况，由此可能影响拉铆后壳体零件10与母材之间的密封性能，降低产品良率。有鉴于此，本实施例对壳体零件10的结构进行进一步设计，具体地：
如图13和图14所示，壳体零件10的法兰12下表面设置有一圈头下凹槽14，壳体零件10的本体11外壁还设置有一圈环形凹槽15，环形凹槽15靠近头下凹槽14设置，环形凹槽15内嵌入式装配有O形密封圈16(图14显示了环形凹槽15尚未装配O形密封圈16的状态)，壳体零件10拉铆安装于母材后，环形凹槽15上的O形密封圈16被母材挤压卡入头下凹槽14。
本实施例利用环形凹槽15的设计，达到在运输、储存以及拉铆过程中0形密封圈 16都不会脱落或错位的情况，由此确保了壳体零件10与母材之间的密封性能。
第7实施例
如图15～16所示，本实施例提供一种铆螺柱100，该铆螺柱100的结构与第5实施例所述的铆螺柱100的结构大体相同，均包括壳体零件10和与壳体零件10同轴配置的双头螺栓20，区别在于，如前所述，双头螺栓20的长度比一般的螺栓要长，为了进一步解决双头螺栓20露在壳体零件10外面的上螺纹段23与壳体零件10的偏心问题，本实施例对双头螺栓20的结构进行了进一步设计，具体地：
如图16所示，双头螺栓20的无螺纹段24包括自上而下设置的一级无螺纹段242和二级无螺纹段241，其中，二级无螺纹段241下接下螺纹段25，二级无螺纹段241的形状与圆孔段131的形状适配，且二级无螺纹段241的外径与圆孔段131的孔径适配，而一级无螺纹段242的外径大于圆孔段131的孔径。
当双头螺栓20旋入壳体零件10后，二级无螺纹段241位于盲孔13的圆孔段131内，一级无螺纹段242位于壳体零件10上表面并与壳体零件10上表面贴平或略有间隙，由此使得一级无螺纹段242能够在保证不偏心的情况下起到限位的作用，并保证装配之后的成品在有振动的情况下也不会松脱和掉出。
此外，为了方便后续和其他零件装配的时候起到预定位和导向的作用，使铆螺柱100更容易的进入对锁的板材开孔内，本实施例将一级无螺纹段242的外径和对锁的板材上的开孔尺寸布置成相近的大小，并使一级无螺纹段242的上端向上延伸形成具有斜面的锥台243，锥台243上接上螺纹段23。
第8实施例
如图17～18所示，本实施例提供一种铆螺柱100，该铆螺柱100的结构与第5实施例所述的铆螺柱100的结构大体相同，均包括壳体零件10和与壳体零件10同轴配置的双头螺栓20，区别主要在于，实施例5在双头螺栓20上螺纹段23的上端设置向上延伸的驱动头21作为驱动单元，而如图17和图18所示，本实施例使上螺纹段23的上端部向内凹陷形成驱动槽22以作为驱动单元，驱动槽22为一字槽或内六角槽或内梅花槽，驱动槽22与上螺纹段23同轴。在装配铆螺柱100的时候，可通过驱动槽22便捷、稳定、精准的将双头螺栓20旋入壳体零件10。
此外，本实施例中，如图18所示，双头螺栓20的上螺纹段23、无螺纹段24、下螺纹段25的外径尺寸相同，于双头螺栓20而言，上螺纹段23、无螺纹段24、下螺纹段25的外径尺寸并无严格的大小要求限制，可以是如本实施例所示的等大设计，也可 以是如实施例5所示的上螺纹段23、下螺纹段25等大而中部的无螺纹段24比上螺纹段23、下螺纹段25稍大一些的设计，此外，上螺纹段23、下螺纹段25也可采用不等大的设计，如使下螺纹段25大于上螺纹段23，使用者可根据实际需要进行选择。
以上对本发明的具体实施例进行了描述，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内，进行多样的变更以及修改。

Claims (18)

  1. 一种铆螺柱，其特征在于，包括内置贯穿通孔的壳体零件和双头螺栓，所述壳体零件的外侧壁为圆形或至少一半的高度呈六边形，所述双头螺栓的一侧旋入通孔内并压铆，所述壳体零件和双头螺栓的竖直中心轴重合；
    所述壳体零件包括上下设置的圆孔段和内螺纹段，且在圆孔段和内螺纹段内形成纵向的通孔，所述双头螺栓从上至下包括上螺纹段、无螺纹段和下螺纹段，所述双头螺栓随着下螺纹段依次旋入圆孔段和内螺纹段，所述下螺纹段与内螺纹段相互啮合并压铆使内外螺纹紧密结合；
    所述上螺纹段位于壳体零件上方。
  2. 根据权利要求1所述的铆螺柱，其特征在于，所述无螺纹段的外径小于圆孔段的内径。
  3. 根据权利要求1所述的铆螺柱，其特征在于，所述无螺纹段从上至下包括一级无螺纹段和二级无螺纹段，所述一级无螺纹段的外径不小于二级无螺纹段的外径。
  4. 根据权利要求3所述的铆螺柱，其特征在于，所述一级无螺纹段的外径大于圆孔段的内径且底部置于壳体零件上方。
  5. 根据权利要求4所述的铆螺柱，其特征在于，所述二级无螺纹段外径小于圆孔段的内径。
  6. 根据权利要求2或3所述的铆螺柱，其特征在于，所述双头螺栓远离壳体零件的一端设置有向纵向延伸的驱动单元。
  7. 根据权利要求6所述的铆螺柱，其特征在于，所述驱动单元采用驱动槽，所述驱动槽采用一字槽或内六角槽或内梅花槽。
  8. 根据权利要求7所述的铆螺柱，其特征在于，所述驱动单元采用驱动头，所述驱动头采用外六角或外梅花结构。
  9. 一种铆螺柱，其特征在于，包括壳体零件和与壳体零件同轴配置的双头螺栓；
    所述壳体零件包括内设盲孔的本体，本体的盲孔开口处设置有法兰，法兰的下表面设置有一圈用以容纳O形密封圈的头下凹槽；所述盲孔包括自上而下设置的圆孔段和内螺纹段，圆孔段的孔径不小于内螺纹段的孔径；
    所述双头螺栓包括自上而下一体同轴设置的上螺纹段、无螺纹段和下螺纹段，所述双头螺栓与壳体零件装配后，下螺纹段与壳体零件的内螺纹段螺接并经压铆紧密结合， 无螺纹段全部或部分位于壳体零件的圆孔段内。
  10. 根据权利要求9所述的铆螺柱，其特征在于，所述头下凹槽内嵌入式装配有O形密封圈。
  11. 根据权利要求9所述的铆螺柱，其特征在于，所述壳体零件的本体外壁还设置有一圈环形凹槽，环形凹槽靠近头下凹槽设置，环形凹槽内装配有O形密封圈，当壳体零件与母材通过拉铆安装后，环形凹槽上的O形密封圈被母材挤压卡入头下凹槽。
  12. 根据权利要求9所述的铆螺柱，其特征在于，所述双头螺栓还包括狗尾，狗尾设置于双头螺栓的底端且狗尾呈倒置的圆台状。
  13. 根据权利要求9所述的铆螺柱，其特征在于，所述下螺纹段的螺纹上设置有竖纹滚花。
  14. 根据权利要求9所述的铆螺柱，其特征在于，所述无螺纹段包括二级无螺纹段，二级无螺纹段的形状、外径与圆孔段的形状、孔径适配，下螺纹段与内螺纹段螺接后，二级无螺纹段位于圆孔段内。
  15. 根据权利要求14所述的铆螺柱，其特征在于，所述无螺纹段包括自上而下设置的一级无螺纹段和二级无螺纹段，所述一级无螺纹段的外径大于圆孔段的孔径，下螺纹段与内螺纹段螺接后，一级无螺纹段贴合于壳体零件的上表面或与壳体零件上表面稍具间隙。
  16. 根据权利要求15所述的铆螺柱，其特征在于，所述一级无螺纹段的上端向上延伸形成具有斜面的锥台，锥台上接上螺纹段。
  17. 根据权利要求9所述的铆螺柱，其特征在于，所述双头螺栓的上螺纹段向上延伸形成驱动头，所述驱动头为外六角结构或外梅花结构。
  18. 根据权利要求9所述的铆螺柱，其特征在于，所述双头螺栓的上螺纹段的上端部向内凹陷形成驱动槽，所述驱动槽为一字槽或内六角槽或内梅花槽。
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