CN111219402A - Novel self tapping bores combination bolt - Google Patents
Novel self tapping bores combination bolt Download PDFInfo
- Publication number
- CN111219402A CN111219402A CN202010195221.4A CN202010195221A CN111219402A CN 111219402 A CN111219402 A CN 111219402A CN 202010195221 A CN202010195221 A CN 202010195221A CN 111219402 A CN111219402 A CN 111219402A
- Authority
- CN
- China
- Prior art keywords
- tapping
- screw
- bolt
- groove hole
- mounting groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 175
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000003754 machining Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Images
Classifications
-
- 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
- F16B35/002—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws onto which threads are cut during screwing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/08—Drills combined with tool parts or tools for performing additional working
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
- B23G5/20—Thread-cutting tools; Die-heads combined with other tools, e.g. drills
Abstract
The invention discloses a novel self-tapping drill combined bolt which comprises a fixing bolt and a tapping drill rod body, wherein the tapping drill rod body comprises a screw tap screw rod and a drill rod which are integrally formed; the tail end of the first connecting head is provided with a polygonal prism structure matched with the drilling equipment, or a third mounting groove hole matched with the drilling equipment is formed in the free end face of the first connecting head; the outer surface of the fixing bolt is provided with an external thread matched with the thread groove hole tapped by the screw tap. The fixing bolt is assembled and connected with the free end of the screw tap screw, so that the fixing bolt with a proper length can be flexibly selected or cut to meet the requirement of a thicker workpiece, and the adaptability of the fixing bolt is improved; after drilling, tapping and fastening are completed at one time, the tapping drill rod body can be detached from the fixing bolt, and resource waste of the tapping drill rod body is reduced.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to a novel self-tapping drill combined bolt.
Background
The self-tapping screw, or fast-tooth screw, is a steel fast-assembling fastener with galvanized and passivated surface. Tapping screws are often used for connecting thin metal plates (steel plates, saw plates, etc.). During connection, a thread bottom hole is firstly formed on the connected piece, and then the tapping screw is screwed into the thread bottom hole of the connected piece.
And (3) statistical display: of the ten expenses that make up the total assembly cost, the highest involves the machining of holes. In practical application, the tapping screw needs to be provided with a prefabricated hole. And in order for the preformed holes to function well in practice, the size of the holes must be controlled within fairly tight limits. In the early 60 s of the 20 th century, self-drilling and self-tapping screws appeared, and prefabricated holes do not need to be machined when the self-drilling and self-tapping screws are used, so that a great step is made forward for reducing the assembly cost. In summary, the self-drilling and self-tapping screw realizes one-time operation of drilling, tapping and fastening, and improves the connection efficiency between workpieces. However, most of the existing self-drilling and self-tapping screws are standard parts formed integrally, so that the adaptability of the screws to workpieces with different thicknesses is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a novel self-tapping drill combined bolt which is particularly suitable for large holes, wherein a fixing bolt is assembled and connected with the free end of a tapping section of a screw tap screw on a tapping rod body, so that the fixing bolt can be flexibly selected or cut to a proper length according to the requirements of thicker workpieces, and the adaptability of the fixing bolt is improved; meanwhile, the tapping rod body can be detached from the fixing bolt after drilling, tapping and fastening are completed at one time, so that the material performance requirement of the connecting bolt, the complexity requirement of a heat treatment process of machining and the resource waste of the process section of the tapping rod body are reduced; the self-tapping drill combined bolt is simple in structure, strong in applicability and high in implementation feasibility.
In order to achieve the purpose, the technical scheme of the invention is to design a novel self-tapping drill combined bolt which comprises a fixing bolt and a tapping drill rod body, wherein the tapping drill rod body comprises a screw tap screw tapping section and a drill rod drilling section which are integrally formed, the fixing bolt comprises a screw rod, one end of the screw rod is assembled and connected with a free end of the screw tap screw tapping section on the tapping drill rod body, and the other end of the screw rod is fixedly provided with a hexagon nut and a first connecting head extending along the length direction of the screw rod; the tail end of the first connecting head is provided with a polygonal prism structure matched with the drilling equipment, or a third mounting groove hole matched with the drilling equipment is formed in the free end face of the first connecting head; and the outer surface of the fixing bolt is provided with an external thread matched with a thread groove hole tapped by the tapping section of the screw tap.
The novel self-tapping drill combined bolt is particularly suitable for large holes, wherein the fixing bolt is assembled and connected with the free end of the tapping section of the tap screw on the tapping rod body, so that the fixing bolt with the proper length can be flexibly selected or cut according to the requirement of a thicker workpiece, and the adaptability of the fixing bolt is improved; meanwhile, the tapping rod body can be detached from the fixing bolt after drilling, tapping and fastening are completed at one time, so that the material performance requirement of the connecting bolt, the complexity requirement of a heat treatment process of machining and the resource waste of the process section of the tapping rod body are reduced; the self-tapping drill combined bolt is simple in structure, strong in applicability and high in implementation feasibility.
In order to facilitate smooth preparation and application implementation of the self-tapping drill combined bolt, the preferable technical scheme is that a first mounting groove hole is formed in the end face of one end, assembled and connected with the screw tap and screw tapping section, of the screw, the first mounting groove hole is provided with a thread inner surface, a threaded connecting rod matched with the first mounting groove hole is arranged at the free end of the screw tap and screw tapping section, and the fixing bolt is in threaded connection with the threaded connecting rod on the screw tap and screw tapping section through the first mounting groove hole. Fixing bolt and attack drilling rod body threaded connection, the two connected mode is simple, and firm stability is high, has guaranteed this self tapping and has bored the fixed mounting efficiency of assembling bolt, fixing bolt and the equipment of attacking the drilling rod body or has dismantled efficiency.
In order to facilitate smooth preparation and application implementation of the self-tapping drill combined bolt, a further preferable technical scheme is that the screw rod is provided with a first mounting groove hole in the end face of one end of the screw tap and screw tapping section in assembly connection, the free end of the screw tap and screw tapping section is provided with a third connector matched with the first mounting groove hole, the cross sections of the first mounting groove hole and the third connector are both polygonal structures, and the fixing bolt is connected with the third connector on the screw tap and screw tapping section in an embedded mode through the first mounting groove hole. The fixing bolt is connected with the tapping drill rod body in an embedded mode, the connection mode of the fixing bolt and the tapping drill rod body is simple, the cross sections of the first mounting groove hole and the third connector are both polygonal structures, the tapping drill rod body can be effectively prevented from shaking relative to the fixing bolt when the self-tapping drill combined bolt is installed in a drilled hole, the firmness and stability of the self-tapping drill combined bolt in the process of installing the drilled hole are guaranteed, and the drilling installation efficiency of the self-tapping drill combined bolt is guaranteed; the fixing bolt and the tapping drill rod body are convenient to mount or dismount, and the assembling efficiency of the self-tapping drill combined bolt and the dismounting efficiency of the tapping drill rod body after fixed mounting are guaranteed.
In order to facilitate smooth preparation and application implementation of the self-tapping drill combined bolt, a further preferable technical scheme is that the screw rod is connected with one end of the screw tap and screw tapping section in an assembling mode and is provided with a second connector, a second installation groove hole matched with the second connector is formed in the free end face of the screw tap and screw tapping section, the cross sections of the second connector and the second installation groove hole are of polygonal structures, and the fixing bolt is connected with the second installation groove hole in the screw tap and screw tapping section in an embedded mode through the second connector. The fixing bolt is connected with the tapping drill rod body in an embedded mode, the connection mode of the fixing bolt and the tapping drill rod body is simple, the cross sections of the second connector and the second mounting groove hole are both polygonal structures, the tapping drill rod body can be effectively prevented from shaking relative to the fixing bolt when the self-tapping drill combined bolt is installed in a drilled hole, the firmness and stability of the self-tapping drill combined bolt in the drilling installation process are guaranteed, and the drilling installation efficiency of the self-tapping drill combined bolt is guaranteed; the fixing bolt and the tapping drill rod body are convenient to mount or dismount, and the assembling efficiency of the self-tapping drill combined bolt and the dismounting efficiency of the tapping drill rod body after fixed mounting are guaranteed.
According to a further preferable technical scheme, the free end of the tapping section of the screw tap screw is also provided with an internal thread mounting groove hole, the upper end opening of the internal thread mounting groove hole is coaxially communicated with the bottom of the second mounting groove hole, and the minimum inner diameter of the second mounting groove hole is larger than the inner diameter of the internal thread mounting groove hole. The free end of the tapping section of the screw tap screw can be fixedly connected with drilling equipment through an internal thread mounting groove hole, so that the fixed mounting mode of the tapping section of the screw tap screw and the drilling equipment is expanded; meanwhile, the minimum inner diameter of the second mounting groove hole is larger than that of the internal thread mounting groove hole, and the free end of the tapping section of the screw tap screw is not hindered from being connected with the second connector or the drilling equipment on the fixing bolt in an embedded mode.
In order to expand the application of the self-tapping drill combination bolt, a further preferable technical scheme is that the first connecting head is provided with a threaded outer surface. The self-tapping drill combined bolt is convenient to be externally connected with a threaded connecting piece, such as a threaded cylinder and a threaded pendant, so that the application of the self-tapping drill combined bolt is expanded.
In a further preferred technical scheme, the free end of the first connecting head is further provided with an internal thread slotted hole, an upper port of the internal thread slotted hole is coaxially communicated with the bottom of the third mounting slotted hole, and the minimum inner diameter of the third mounting slotted hole is larger than the inner diameter of the internal thread slotted hole. The internal thread groove hole is convenient for the external connection of the fixing bolt with the thread fixing components such as the bolt, the screw rod and the like, thereby expanding the connection mode of the external connection of the fixing bolt with the thread fixing components and further improving the universal applicability of the self-tapping drill combined bolt.
In order to ensure the universality and the flexible adaptability of the self-tapping drill combination bolt, a further preferable technical scheme is that the cross sections of the tail end of the first connector, the second connector and the third connector are all hexagonal structures. The tail end of the first connecting head is of a hexagonal structure, so that the adaptability of the fixing bolt and drilling equipment or a wrench is ensured, and the fixing bolt is convenient to mount or dismount; the second connector is in embedded fit with the second mounting groove hole, the cross section of the second connector is of a hexagonal structure, namely the cross section of the second mounting groove hole is of a hexagonal structure, or the cross section of the third connector is of a hexagonal structure, so that the adaptability of the tapping drill rod body and drilling equipment is ensured, and the tapping drill rod body can be used as the drilling equipment of the screw hole independently.
According to the preferable technical scheme, the drilling section of the drill rod is of a twist-shaped spiral structure.
In order to facilitate the implementation of the self-tapping drill combination bolt in expanding application, the further preferred technical scheme is that the self-tapping drill combination bolt further comprises a nut component, wherein the nut component comprises a hexagonal end cap and a sleeve which is vertically and fixedly arranged on one side surface of the hexagonal end cap, and the inner surface of the sleeve is provided with an internal thread matched with the outer surface of the upper thread of the first connector; or the first connector also comprises an inner hexagon bolt, and the inner hexagon bolt is matched with the inner thread slotted hole on the first connector. The nut component is fixed on the first connecting head of the fixing bolt through the sleeve in a threaded manner, or the inner hexagon bolt is fixed on the first connecting head of the fixing bolt in a threaded manner, so that other objects can be hung or fixed conveniently, and the application of the self-tapping drill combined bolt is expanded.
The invention has the advantages and beneficial effects that:
1. the novel self-tapping drill combined bolt is particularly suitable for large holes, wherein the fixing bolt is assembled and connected with the free end of the tapping section of the tap screw on the tapping rod body, so that the fixing bolt with the proper length can be flexibly selected or cut according to the requirement of a thicker workpiece, and the adaptability of the fixing bolt is improved; meanwhile, the tapping rod body can be detached from the fixing bolt after drilling, tapping and fastening are completed at one time, so that the material performance requirement of the connecting bolt, the complexity requirement of a heat treatment process of machining and the resource waste of the process section of the tapping rod body are reduced; the self-tapping drill combined bolt is simple in structure, strong in applicability and high in implementation feasibility.
2. Fixing bolt and attack drilling rod body threaded connection, the two connected mode is simple, and firm stability is high, has guaranteed this self tapping and has bored the fixed mounting efficiency of assembling bolt, fixing bolt and the equipment of attacking the drilling rod body or has dismantled efficiency.
3. The fixing bolt is connected with the tapping drill rod body in an embedded mode, the connection mode of the fixing bolt and the tapping drill rod body is simple, the cross sections of the first mounting groove hole and the third connector are both polygonal structures, the tapping drill rod body can be effectively prevented from shaking relative to the fixing bolt when the self-tapping drill combined bolt is installed in a drilled hole, the firmness and stability of the self-tapping drill combined bolt in the process of installing the drilled hole are guaranteed, and the drilling installation efficiency of the self-tapping drill combined bolt is guaranteed; the fixing bolt and the tapping drill rod body are convenient to mount or dismount, and the assembling efficiency of the self-tapping drill combined bolt and the dismounting efficiency of the tapping drill rod body after fixed mounting are guaranteed.
4. The first connector is provided with a threaded outer surface. The self-tapping drill combined bolt is convenient to be externally connected with a threaded connecting piece, such as a threaded cylinder and a threaded pendant, so that the application of the self-tapping drill combined bolt is expanded.
5. The free end of the first connecting head is also provided with an internal thread slotted hole, the upper port of the internal thread slotted hole is coaxially communicated with the bottom of the third mounting slotted hole, and the minimum inner diameter of the third mounting slotted hole is larger than the inner diameter of the internal thread slotted hole. The internal thread groove hole is convenient for the external connection of the fixing bolt with the thread fixing components such as the bolt, the screw rod and the like, thereby expanding the connection mode of the external connection of the fixing bolt with the thread fixing components and further improving the universal applicability of the self-tapping drill combined bolt.
6. The tail end of the first connecting head is of a hexagonal structure, so that the adaptability of the fixing bolt and drilling equipment or a wrench is ensured, and the fixing bolt is convenient to mount or dismount; the second connector is matched with the second mounting groove hole in an embedded mode, the cross section of the second connector is of a hexagonal structure, namely the cross section of the second mounting groove hole is of a hexagonal structure, or the cross section of the third connector is of a hexagonal structure, so that the adaptability of the tapping drill rod body and drilling equipment is guaranteed, and the tapping drill rod body can be used as the drilling equipment of the screw hole independently.
7. The nut component is fixed on the first connecting head of the fixing bolt through the sleeve in a threaded manner, or the inner hexagon bolt is fixed on the first connecting head of the fixing bolt in a threaded manner, so that other objects can be hung or fixed conveniently, and the application of the self-tapping drill combined bolt is expanded.
Drawings
FIG. 1 is a schematic structural view of the novel self-tapping drill combination bolt of the present invention;
FIG. 2 is a schematic view showing a disassembled structure of the novel self-tapping drill assembling bolt in example 1;
FIG. 3 is a schematic view showing a disassembled structure of the novel self-tapping drill assembling bolt of embodiment 2;
FIG. 4 is a schematic view showing a disassembled structure of the novel self-tapping drill assembling bolt of embodiment 3;
FIG. 5 is a view showing the applied assembly relationship of the fixing bolt and nut assembly in embodiment 3;
fig. 6 is an application and assembly relationship diagram of the fixing bolt and the hexagon socket head cap screw in embodiment 3.
In the figure: 1. fixing the bolt; 2. tapping a drill rod body; 3. a nut assembly; 4. a hexagon socket head cap screw; 1-1, a screw; 1-1-1, a first mounting slot; 1-2, hexagonal nuts; 1-3, a first connector; 1-3-1, a third mounting slot; 1-3-2, inner thread slotted hole; 1-4, a second connector; 2-1, tapping a screw tap screw rod tapping section; 2-2, drilling a drill pipe section; 2-3, a threaded connecting rod; 2-4, a third connector; 2-5, a second mounting slot; 2-6, mounting a slotted hole by internal threads; 3-1, hexagonal end cap; 3-2, sleeving a sleeve.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1-2, the invention relates to a novel self-tapping combined bolt, which comprises a fixing bolt 1 and a tapping rod body 2, wherein the tapping rod body 2 comprises a tap screw tapping section 2-1 and a drill rod drilling section 2-2 which are integrally formed, the fixing bolt 1 comprises a screw 1-1, one end of the screw 1-1 is assembled and connected with a free end of the tap screw tapping section 2-1 on the tapping rod body 2, and the other end of the screw 1-1 is fixedly provided with a hexagon nut 1-2 and a first connecting joint 1-3 extending along the length direction of the screw 1-1; the tail end of the first connecting head 1-3 is provided with a polygonal prism structure matched with drilling equipment, or the free end face of the first connecting head 1-3 is provided with a third mounting groove hole 1-3-1 matched with the drilling equipment; and the outer surface of the fixing bolt 1 is provided with an external thread matched with a thread groove hole tapped by the tapping section 2-1 of the screw tap screw.
Preferably, a first mounting groove hole 1-1-1 is formed in the end face of one end, assembled and connected with the screw tap screw tapping section 2-1, of the screw 1-1, the first mounting groove hole 1-1 is provided with a threaded inner surface, a threaded connecting rod 2-3 matched with the first mounting groove hole 1-1-1 is arranged at the free end of the screw tap screw tapping section 2-1, and the fixing bolt 1 is in threaded connection with the threaded connecting rod 2-3 on the screw tap screw tapping section 2-1 through the first mounting groove hole 1-1-1.
Preferably, the first connection 1-3 is provided with a threaded outer surface.
Preferably, the drilling section 2-2 of the drill rod is of a twist-shaped spiral structure.
Further preferably, the cross section of the end of the first connector 1-3 is hexagonal structure.
Example 2
As shown in fig. 3, the invention relates to a novel self-tapping combined bolt, which is different from embodiment 1 in that a first installation groove hole 1-1-1 is formed in the end face of one end, assembled and connected with a tap screw tapping section 2-1, of a screw 1-1, a third connector 2-4 matched with the first installation groove hole 1-1-1 is arranged at the free end of the tap screw tapping section 2-1, the cross sections of the first installation groove hole 1-1-1 and the third connector 2-4 are both in a polygonal structure, and a fixing bolt 1 is connected with the third connector 2-4 on the tap screw tapping section 2-1 in an embedded mode through the first installation groove hole 1-1-1.
Preferably, the cross sections of the first mounting slot 1-1-1 and the third connector 2-4 are both hexagonal structures.
Example 3
As shown in fig. 4, the invention relates to a novel self-tapping combined bolt, which is different from the embodiment 1 in that a second connector 1-4 is arranged at one end of the screw 1-1, which is connected with the tapping section 2-1 of the screw tap screw in an assembling manner, a second mounting groove hole 2-5 matched with the second connector 1-4 is arranged at the free end face of the tapping section 2-1 of the screw tap screw, the cross sections of the second connector 1-4 and the second mounting groove hole 2-5 are both in a polygonal structure, and the fixing bolt 1 is connected with the second mounting groove hole 2-5 on the tapping section 2-1 of the screw tap screw in an embedding manner through the second connector 1-4.
Preferably, the free end of the tapping section 2-1 of the tap screw is further provided with an internal thread mounting groove hole 2-6, the upper end opening of which is coaxially communicated with the bottom of the second mounting groove hole 2-5, and the minimum inner diameter of the second mounting groove hole 2-5 is larger than the inner diameter of the internal thread mounting groove hole 2-6.
Preferably, the free end of the first connecting head 1-3 is further provided with an internal thread slot 1-3-2, the upper port of which is coaxially communicated with the bottom of the third mounting slot 1-3-1, and the minimum inner diameter of the third mounting slot 1-3-1 is larger than the inner diameter of the internal thread slot 1-3-2.
Preferably, the cross sections of the second connecting heads 1-4 and the second mounting slots 2-5 are both hexagonal structures.
The assembling application mode of the novel self-tapping drill combined bolt and the nut component further comprises the nut component 3, as shown in fig. 5, the nut component 3 comprises a hexagonal end cap 3-1 and a sleeve 3-2 vertically and fixedly arranged on one side face of the hexagonal end cap 3-1, and an internal thread matched with the outer surface of the upper thread of the first connecting head 1-3 is arranged on the inner surface of the sleeve 3-2. The sleeve 3-2 of the nut assembly 3 is screw-fastened to the first coupling head 1-3 of the fixing bolt 1.
The assembling application mode of the novel self-tapping drill combined bolt and the inner hexagon bolt is shown in fig. 6, and the novel self-tapping drill combined bolt further comprises the inner hexagon bolt 4, wherein the inner hexagon bolt 4 is matched with the inner thread groove hole 1-3-2 in the first connecting head 1-3. The hexagon socket head cap screw 4 is fixed in the internal thread slotted hole 1-3-2 on the first connector 1-3 of the fixed bolt 1 by screw connection.
The nut component 3 or the inner hexagon bolt 4 can be used for hanging or fixing objects, so that the phenomenon that the fixing bolt is installed by drilling the connecting piece again when the objects are fixed is avoided, and the purpose of the self-tapping drill combined bolt is expanded.
The invention discloses a novel self-tapping drill combined bolt, which has the following use principle:
fixedly installing a first connecting head 1-3 of a fixing bolt 1 in an installation hole of drilling equipment; screwing, fixing or embedding the tap screw tapping section 2-1 of the tapping rod body 2 into a first mounting groove hole 1-1-1 of the fixing bolt 1 (or embedding and installing the tap screw tapping section 2-1 of the tapping rod body 2 onto a second connector 1-4 of the fixing bolt 1); vertically and correspondingly compressing the free end of the drilling section 2-2 of the drill rod with a designated site of a connecting piece to be fixed, and starting drilling equipment to screw the fixing bolt 1 into the connecting piece; the drilling equipment is detached from the fixing bolt 1.
After drilling, tapping and fastening of the novel self-tapping drill combined bolt are completed at one time, the tapping drill rod body 2 can be detached from the fixing bolt 1 from the back of the connecting piece, and the material performance requirement of the connecting bolt, the complexity requirement of a heat treatment process of machining and the resource waste of a process section part of the tapping drill rod body 2 are reduced.
In addition, the tapping drill rod body 2 can be independently used as tapping equipment for screw holes, and the use flexibility of the novel self-tapping drill combined bolt is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The novel self-tapping drill combined bolt is characterized by comprising a fixing bolt (1) and a tapping drill rod body (2), wherein the tapping drill rod body (2) comprises a screw tap screw tapping section (2-1) and a drill rod drilling section (2-2) which are integrally formed, the fixing bolt (1) comprises a screw (1-1), one end of the screw (1-1) is assembled and connected with a free end of the screw tap screw tapping section (2-1) on the tapping drill rod body (2), and the other end of the screw (1-1) is fixedly provided with a hexagon nut (1-2) and a first connecting head (1-3) extending along the length direction of the screw (1-1); the tail end of the first connecting head (1-3) is provided with a polygonal prism structure matched with drilling equipment, or the free end face of the first connecting head (1-3) is provided with a third mounting groove hole (1-3-1) matched with the drilling equipment; the outer surface of the fixing bolt (1) is provided with external threads matched with a thread groove hole tapped by the tapping section (2-1) of the screw tap.
2. A novel self-tapping combined bolt as claimed in claim 1, wherein a first mounting groove hole (1-1-1) is formed in the end face of one end of the screw (1-1) and the screw tap tapping section (2-1) in an assembling connection mode, a threaded inner surface is formed in the first mounting groove hole (1-1-1), a threaded connecting rod (2-3) matched with the first mounting groove hole (1-1-1) is arranged at the free end of the screw tap tapping section (2-1), and the fixing bolt (1) is in threaded connection with the threaded connecting rod (2-3) on the screw tap tapping section (2-1) through the first mounting groove hole (1-1-1).
3. A novel self-tapping combined bolt as claimed in claim 1, wherein a first mounting groove hole (1-1-1) is formed in the end face of one end, assembled and connected with the screw tap tapping section (2-1), of the screw tap (1-1), a third connector (2-4) matched with the first mounting groove hole (1-1-1) is arranged at the free end of the screw tap tapping section (2-1), the cross sections of the first mounting groove hole (1-1-1) and the third connector (2-4) are of a polygonal structure, and the fixing bolt (1) is connected with the third connector (2-4) on the screw tap tapping section (2-1) in an embedded mode through the first mounting groove hole (1-1-1).
4. A novel self-tapping combined bolt as claimed in claim 1, wherein a second connector (1-4) is arranged at one end of the screw (1-1) and the screw tap tapping section (2-1) in assembly connection, a second mounting groove hole (2-5) matched with the second connector (1-4) is formed in the free end face of the screw tap tapping section (2-1), the cross sections of the second connector (1-4) and the second mounting groove hole (2-5) are both polygonal structures, and the fixing bolt (1) is connected with the second mounting groove hole (2-5) in the screw tap tapping section (2-1) in an embedded mode through the second connector (1-4).
5. A novel self-tapping combined bolt as claimed in claim 4, characterized in that the free end of the tapping section (2-1) of the tap screw is further provided with an internally threaded mounting slot (2-6) having an upper port coaxially communicated with the bottom of the second mounting slot (2-5), and the minimum inner diameter of the second mounting slot (2-5) is larger than the inner diameter of the internally threaded mounting slot (2-6).
6. A novel self-tapping composite bolt according to any one of claims 1-5, characterised in that said first connector (1-3) is provided with a threaded outer surface.
7. A novel self-tapping composite bolt as defined in claim 6, characterized in that said first joint (1-3) is further provided at its free end with an internally threaded slot (1-3-2) having an upper end coaxially penetrating the bottom of said third mounting slot (1-3-1), and said third mounting slot (1-3-1) has a minimum inner diameter greater than the inner diameter of said internally threaded slot (1-3-2).
8. A novel self-tapping composite bolt according to claim 7, characterised in that the cross-sections of the ends of the first connectors (1-3), the second connectors (1-4) and the third connectors (2-4) are of hexagonal configuration.
9. A novel self-tapping composite bolt as defined in claim 8, wherein said drill rod bore section (2-2) is of a twist-like helical configuration.
10. A novel self-tapping combination bolt as defined in claim 9, further comprising a nut assembly (3), said nut assembly (3) comprising a hexagonal end cap (3-1) and a sleeve (3-2) vertically fixed to one side of said hexagonal end cap (3-1), said sleeve (3-2) having an inner surface provided with an internal thread adapted to an outer surface of the thread of said first connector (1-3); or the connecting device also comprises an inner hexagon bolt (4), wherein the inner hexagon bolt (4) is matched with the inner thread slotted hole (1-3-2) on the first connecting head (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195221.4A CN111219402A (en) | 2020-03-19 | 2020-03-19 | Novel self tapping bores combination bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195221.4A CN111219402A (en) | 2020-03-19 | 2020-03-19 | Novel self tapping bores combination bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111219402A true CN111219402A (en) | 2020-06-02 |
Family
ID=70826946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010195221.4A Pending CN111219402A (en) | 2020-03-19 | 2020-03-19 | Novel self tapping bores combination bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377500A (en) * | 2020-11-11 | 2021-02-19 | 山东鑫沈行新材料科技有限公司 | Combined self-tapping screw |
-
2020
- 2020-03-19 CN CN202010195221.4A patent/CN111219402A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377500A (en) * | 2020-11-11 | 2021-02-19 | 山东鑫沈行新材料科技有限公司 | Combined self-tapping screw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5743691A (en) | Clinch-type fastener member | |
| CN111219402A (en) | Novel self tapping bores combination bolt | |
| EP2494218B1 (en) | Self-drilling bolt and nut assembly | |
| CN102852952B (en) | Thread positioning locking mechanism and mounting method | |
| CN212202779U (en) | Novel self tapping bores combination bolt | |
| JP6923984B1 (en) | Rug screw bolt mounting jig and mounting method | |
| CN210263421U (en) | Self-tapping screw for building component | |
| CN211550223U (en) | Self-fixing bolt type fastener | |
| CN216044863U (en) | Anti-rotation expansion bolt | |
| CN207212900U (en) | A kind of studs | |
| CN219711982U (en) | Portable expansion bolt | |
| CA1245084A (en) | Connector | |
| JP6606556B2 (en) | Fastening element, manufacturing method thereof, and fastening method | |
| CN219317378U (en) | Locking fastening screw | |
| KR200308005Y1 (en) | A anchor bolt for concrete | |
| CN212389625U (en) | Quick-mounting expansion bolt | |
| CN214661343U (en) | Anti-disassembly bolt for high-speed rail equipment | |
| CN212429470U (en) | Special bolt | |
| CN112204266B (en) | Self-drilling bolt and nut | |
| CN212202795U (en) | Easy-to-install and knock-down nut assembly | |
| CN113404756A (en) | Anti-rotation expansion bolt | |
| CN212202759U (en) | Novel expansion bolt | |
| CN109611428B (en) | Concealed furniture connecting piece and concealed furniture connecting structure | |
| CN214146183U (en) | Double-thread self-tapping screw | |
| CN211039340U (en) | Titanium alloy bolt with inclined plane structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |