CN211820288U - Fastener with pretension function - Google Patents
Fastener with pretension function Download PDFInfo
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- CN211820288U CN211820288U CN202020364549.XU CN202020364549U CN211820288U CN 211820288 U CN211820288 U CN 211820288U CN 202020364549 U CN202020364549 U CN 202020364549U CN 211820288 U CN211820288 U CN 211820288U
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Abstract
The utility model discloses a fastener with pretension function. The rivet comprises a thread-shaped locking groove section and is provided with a rivet thread matched with the lantern ring thread; the lantern ring includes lantern ring multilateral type screw pretension section and lantern ring riveting deformation section, and lantern ring multilateral type screw pretension section inner wall sets up the lantern ring screw thread that matches with the rivet screw thread. When in connection, the pre-installation is firstly carried out, and then the riveting operation of the deformation area is carried out; the special breaking tool is used for breaking and dismantling, and the cutting, breaking and dismantling of the lantern ring deformation area are completed, and then the lantern ring deformation area is screwed out for separation. The utility model discloses the fastener can be realized being by the pretension between the connecting piece, accomplishes the preinstallation between the part, realizes the pretension of connection process, makes to be connected and produces the maximum pretightning force that can reach about 50% of clamp force between the work piece, through increasing multilateral type screw thread pretension section at lantern ring part, realizes rivet fastener's pretension function. The utility model discloses installation, dismantlement are convenient, and locking, fatigue resistance are stronger, possess the connection advantage of check bolt and annular rivet fastener simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the riveting, especially, belong to a design and the manufacturing of a rivet riveting fastener for connecting, belong to metal machining's riveting class (B21J) and fastener class (F16B).
Background
The pull rivet is a fastening connector commonly used in the existing fastening connection mode, and is generally used for connecting components needing to be bolted or riveted. When the fastening operation is used, after the two parts to be combined are clamped by adopting special equipment for pulling the rivet, the metal of the sleeved annular lantern ring is extruded and the pits of the plurality of annular grooves of the stud are filled with the metal, so that the lantern ring and the rivet are tightly combined and fastened. The blind rivet fastener has the same fastening force and the characteristics of never loosening and the like after the assembly is finished.
In the actual construction process, pre-tightening connection is required for some complicated and special connection structures. The existing ring groove rivet fastener can not realize pre-tightening in the installation process in the use process, and the pre-tightening generates clamping force in one-time installation; the existing fastener is used for fastening construction operation, the mounting hole deviation is easy to occur in the later mounting period, construction cannot be carried out, the structure with high verticality requirement is not pre-mounted, the structure is inclined probably in one-time riveting, and the phenomenon of collapse can occur to a serious person.
Disclosure of Invention
The utility model discloses a fastener with pretension function according to prior art's not enough. The utility model aims at providing a can carry out the fixed fastener structure of pretension in advance before the riveting fixed, adopt the utility model discloses the fastener can make and produce better pretightning force between the connecting piece, realizes fixing between the connecting piece and pre-installation, accomplishes the integral erection riveting fixed according to the design after accomplishing other operations again.
The utility model discloses a following technical scheme realizes:
a fastener with a pre-tightening function is characterized in that: comprises a rivet and a lantern ring;
the rivet sequentially comprises a polygonal rivet head, a rivet polish rod, a rivet thread type locking groove and a rivet ring groove tail tooth; the rivet thread type locking groove section is provided with a rivet thread matched with the lantern ring thread;
the lantern ring sequentially comprises a multi-side thread pre-tightening section of the lantern ring and a riveting deformation section of the lantern ring; wherein, the lantern ring screw thread that matches with the rivet screw thread is set up to lantern ring multilateral type screw thread pretension section inner wall.
Furthermore, the cross section outline of the polygonal rivet head and the polygonal thread pre-tightening section of the lantern ring is a regular hexagon or a regular quadrangle.
The crest and the root of the longitudinal structure of the rivet thread are in arc transition.
The circular arcs of the tooth bottom comprise two circular arcs with the same radius at two sides of the bottom edge of the tooth socket, the circular arcs of the tooth top comprise two circular arcs with the same radius at two ends of the tooth socket, and the circular arc radius of the tooth top is not equal to the circular arc radius at the bottom edge of the tooth socket.
Adopt the utility model discloses fastener with pretension function carries out fastening connection's method is: pre-tightening and installing the rivet and the lantern ring, tightening the polygonal head of the rivet or the polygonal thread pre-tightening section of the lantern ring by using a torque wrench, screwing the rivet into the thread pre-tightening area of the lantern ring, judging a value of generated pre-tightening force according to the torque value displayed by the torque wrench, and completing the pre-tightening and installing; and (3) applying axial force to the rivet by using a riveting tool, and simultaneously radially extruding the lantern ring deformation area to complete the riveting operation of the lantern ring deformation area.
Adopt the utility model discloses the method that the fastener that has the pretension function broke open is: cutting and breaking the deformed region of the lantern ring by using a special breaking-in tool; the rivet is then unscrewed using a torque wrench.
The utility model discloses the rivet and the lantern ring material of fastener all adopt ordinary carbon steel, and the rivet carries out thermal treatment and surperficial blackening and handles, improves rivet intensity. The lantern ring is subjected to heat treatment and surface galvanization treatment, so that the strength of the lantern ring is improved, the friction force in the riveting process is reduced, and the fastener with the pre-tightening function can exceed 10.9-grade high-strength bolts of the same specification.
The utility model discloses the fastener has combined the theory of operation of current check bolt and annular rivet, the fastener structure is different from conventional annular rivet and bolt, it is excessive that rivet crest and tooth low pass adoption circular arc, change modes such as tooth form angular value size and reduce the stress concentration of tooth root, when connecting, the rivet passes the mounting hole, embolia the lantern ring from rivet tail tooth section, make lantern ring thread type pretension district and rivet thread type locking groove accomplish the cooperation, the multilateral wrong type rivet head portion or the lantern ring of twisting torque wrench of reuse, make and produce sufficient pretightning force between the connecting piece, reuse special riveter and rivet the deformation district to the lantern ring riveting, whole process divides two steps to go on promptly: firstly, a torque wrench is used for screwing the head part or the lantern ring of the polygonal rivet, and pretightening force is obtained through torque; and secondly, riveting the deformed section of the lantern ring by using a riveter, and radially extruding the lantern ring by axially stretching the rivet to generate final clamping force.
The utility model discloses profitability: compare current high strength annular rivet connection vice, the utility model discloses the fastener can be realized being accomplished by the pretension between the connecting piece, and the pre-installation between the part realizes the pretension of connection process, makes and is connected the maximum pretightning force that can reach about 50% of clamp force of producing between the work piece, through increasing multilateral type screw thread pretension section at lantern ring part, realizes rivet fastener's pretension function. The utility model discloses installation, dismantlement are convenient, and locking, fatigue resistance are stronger, possess the connection advantage of check bolt and annular rivet fastener simultaneously.
Drawings
FIG. 1 is a schematic view of the fastener of the present invention;
FIG. 2 is a front view of the fastener rivet of the present invention;
FIG. 3 is a side view of the fastener rivet of the present invention;
FIG. 4 is a schematic cross-sectional view of the fastener collar of the present invention;
FIG. 5 is a side view of the fastener collar of the present invention;
fig. 6A to 6D are schematic views illustrating a fastening operation process of the fastener of the present invention; where fig. 6A is a twist pre-tightening, the arrow direction is the twist direction, fig. 6B is a caulking preparation, fig. 6C is a press-caulking, and fig. 6D is a caulking completion. The section structure schematic diagram of the lantern ring and the pre-tightening ring;
fig. 7A to 7C are schematic views illustrating the operation process of breaking open the fastener according to the present invention; wherein, fig. 7A is a preparation for breaking, fig. 7B is a cutting for breaking, fig. 7C is a separation by knob, and an arrow direction is a direction of knob;
fig. 8 is a schematic view of the structure of the tooth shape of the rivet of the present invention.
In the figure, 1 is a rivet, 1.1 is a polygonal rivet head, 1.2 is a rivet polish rod, 1.3 is a rivet thread type locking groove, 1.4 is a rivet ring groove tail tooth, 2 is a lantern ring, 2.1 is a lantern ring polygonal thread pre-tightening section, 2.2 is a lantern ring riveting deformation section, 3 is a connecting piece, 4 is a riveting tool, R1 is an arc of a tooth bottom, and R2 is an arc of a tooth top.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.
With reference to the attached drawings.
As shown in the figure, the fastener with the pre-tightening function comprises a rivet 1 and a lantern ring 2;
the rivet 1 sequentially comprises a polygonal rivet head 1.1, a rivet polish rod 1.2, a rivet thread type locking groove 1.3 and a rivet ring groove tail tooth 1.4; wherein, 1.3 sections of the rivet thread type locking groove are provided with rivet threads matched with the threads of the lantern ring;
the lantern ring 2 sequentially comprises a lantern ring multi-side thread pre-tightening section 2.1 and a lantern ring riveting deformation section 2.1; wherein, the lantern ring thread that matches with the rivet thread is set up to lantern ring multilateral type screw pretension section 2.1 inner wall.
The cross section outline of the polygonal rivet head 1.1 and the polygonal thread pre-tightening section 2.1 of the lantern ring is regular hexagon or regular quadrangle. In the present illustration, a regular hexagon.
As shown in fig. 8, the crests and roots of the longitudinal structure of the rivet thread are rounded off. The arc R1 of the tooth bottom comprises two arcs R1 with equal radius at two sides of the bottom edge of the tooth socket, the arc R2 of the tooth top comprises two arcs R2 with equal radius at two ends of the tooth socket, and the radius of the arc R2 of the tooth top is not equal to the radius of the arc R1 of the bottom edge of the tooth socket. The common thread form is an equilateral or isosceles triangle, and the angle of the form is 60. Or 55, which tends to cause stress fatigue in the tooth root. The utility model discloses rivet crest and the bottom of a tooth are through adopting the circular arc excessive, change modes such as tooth form angular value size to reduce the stress concentration of tooth root, and fastening effect is better.
As shown in the figure, the utility model discloses the fastener has combined the theory of operation of current check bolt and annular rivet connection fastener, it is excessive through adopting the circular arc to rivet soon the crest and the bottom of a tooth of formula rivet 1 structure, change modes such as profile angle value size and reduce the stress concentration of tooth root, when connecting, rivet 1 passes the mounting hole, embolia rivet 1 with the lantern ring 2 from the rivet tail tooth, the lantern ring screw that makes lantern ring multilateral type screw pretension section 2.1 accomplishes the cooperation with the rivet screw of rivet screw thread type locking trough section 1.3, reuse torque wrench and revolve the head hexagon of the rivet or the lantern ring of revolving multilateral type rivet head section 1.1, the messenger is by producing corresponding pretightning force between connecting piece 3, reuse special riveting tool rivets lantern ring riveting deformation section 2.2, the whole process divides two steps to go on promptly: firstly, a torque wrench is used for screwing a hexagonal head or a lantern ring of a rivet, and pretightening force is obtained through torque; and secondly, riveting the lantern ring deformation area by using a special riveting tool, and radially extruding the lantern ring by axially stretching the rivet to generate final clamping force.
The utility model discloses the installation of fastener and broken method of tearing open:
installing and breaking the tool: torque wrench, special riveting tool, broken instrument of tearing open and supporting power supply. Installation: the installation process is as shown in fig. 6A to 6D, firstly, the multi-side thread pre-tightening section 2.1 of the lantern ring is installed, the multi-side rivet head section 1.1 or the lantern ring is tightened by using a torque wrench, the rivet is screwed into the lantern ring riveting deformation section 2.2, the value of the generated pre-tightening force is judged according to the torque value displayed by the torque wrench, and the pre-tightening installation is completed. And then applying axial force to the rivet by using a riveting tool, and simultaneously radially extruding the lantern ring deformation area to complete the riveting operation of the lantern ring deformation area.
Breaking and dismantling: the breaking-in process is as shown in fig. 7A to 7C, and the breaking-in of the collar riveting deformation section 2.2 is first completed with a special breaking-in tool. The rivet is then unscrewed using a torque wrench.
The utility model discloses the fastener has pretension function before the installation, and the installation divides twice to go on, screws up lantern ring polygon type screw pretension section 2.1 through torque wrench for the first time, makes and is produced certain pretightning force between the connecting piece, and the second time is through specialized tool riveting lantern ring riveting deformation section 2.2, obtains final clamp force and accomplishes fastening connection. The utility model discloses an increase lantern ring multilateral type screw thread pretension section 2.1 in lantern ring part, realize the pretension function of fastener. The utility model discloses the fastener installation, dismantle conveniently, have the vice connection advantage of check bolt and annular rivet connection, locking, fatigue resistance are stronger.
Claims (4)
1. A fastener with a pre-tightening function is characterized in that: comprises a rivet and a lantern ring;
the rivet sequentially comprises a polygonal rivet head, a rivet polish rod, a rivet thread type locking groove and a rivet ring groove tail tooth; the rivet thread type locking groove section is provided with a rivet thread matched with the lantern ring thread;
the lantern ring sequentially comprises a multi-side thread pre-tightening section of the lantern ring and a riveting deformation section of the lantern ring; wherein, the lantern ring screw thread that matches with the rivet screw thread is set up to lantern ring multilateral type screw thread pretension section inner wall.
2. The fastener with a pretensioning function according to claim 1, characterized in that: the cross section outline of the polygonal rivet head and the polygonal thread pre-tightening section of the lantern ring is a regular hexagon or a regular quadrangle.
3. The fastener with a pretensioning function according to claim 2, characterized in that: the crest and the root of the longitudinal structure of the rivet thread are in arc transition.
4. The fastener with a pretensioning function according to claim 3, characterized in that: the circular arcs of the tooth bottom comprise two circular arcs with the same radius at two sides of the bottom edge of the tooth socket, the circular arcs of the tooth top comprise two circular arcs with the same radius at two ends of the tooth socket, and the circular arc radius of the tooth top is not equal to the circular arc radius at the bottom edge of the tooth socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020364549.XU CN211820288U (en) | 2020-03-20 | 2020-03-20 | Fastener with pretension function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020364549.XU CN211820288U (en) | 2020-03-20 | 2020-03-20 | Fastener with pretension function |
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| Publication Number | Publication Date |
|---|---|
| CN211820288U true CN211820288U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020364549.XU Active CN211820288U (en) | 2020-03-20 | 2020-03-20 | Fastener with pretension function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271358A (en) * | 2020-03-20 | 2020-06-12 | 眉山中车紧固件科技有限公司 | Fastener with pre-tightening function and mounting and breaking-in method thereof |
| CN112855816A (en) * | 2021-01-07 | 2021-05-28 | 浙江奇碟汽车零部件有限公司 | Detect frock of friction riveting intensity |
-
2020
- 2020-03-20 CN CN202020364549.XU patent/CN211820288U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271358A (en) * | 2020-03-20 | 2020-06-12 | 眉山中车紧固件科技有限公司 | Fastener with pre-tightening function and mounting and breaking-in method thereof |
| CN112855816A (en) * | 2021-01-07 | 2021-05-28 | 浙江奇碟汽车零部件有限公司 | Detect frock of friction riveting intensity |
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