CN206988262U - A kind of Bobtail tension rivet - Google Patents
A kind of Bobtail tension rivet Download PDFInfo
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- CN206988262U CN206988262U CN201720768009.6U CN201720768009U CN206988262U CN 206988262 U CN206988262 U CN 206988262U CN 201720768009 U CN201720768009 U CN 201720768009U CN 206988262 U CN206988262 U CN 206988262U
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- rivet
- lock part
- bobtail tension
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- short
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Abstract
The utility model discloses a kind of Bobtail tension rivet, the collar including rivet and with rivets, rivet includes the ailhead being sequentially connected, polished rod, annular tight lock part and short-tail, short-tail include the lock part that is connected with annular tight lock part, and what is be connected with lock part expand Access Division, lock part and Access Division is expanded, and annular tight lock part is connected by arc-shaped transition structure.During work; the axially position locking end face locking of claw in the lock part and installation tool of short-tail; the concave sphere profile department cooperation for expanding Access Division and claw of short-tail; short-tail lock part and claw locking end face axial restriction effect under; claw is fully engaged against with short-tail, and installation tool is automatically positioned with the collar, aligned, while reduces the effect for the stress concentration that rivet occurs in installation process; while so as to improve installation effectiveness, it is effectively protected Bobtail tension rivet and is not damaged by.
Description
Technical field
Machining technology field is the utility model is related to, more particularly to a kind of Bobtail tension rivet.
Background technology
The fastening that Bobtail tension rivet is mainly used in high strength component with holes (between steel, aluminium alloy, stainless steel) connects
Field is connect, existing Bobtail tension rivet mainly there are two kinds of structures of more kerves and single kerve according to the characteristics of its short-tail.
It refer to accompanying drawing, Fig. 1 and the structural representation that Fig. 2 is more kerve short-tail rivets, the locking of more kerve short-tail rivets
Section tooth form is by the r in Fig. 21, r2, r3And r4The mixed starters line style of corresponding circular arc composition, but the tooth Profile Machining manufacture difficulty
Greatly, the accuracy of manufacture is difficult to control, and SHAPE DETECTION is relatively difficult, therefore manufacturing cost is also higher；The short-tail of more kerves is provided with more
Individual annular pull grooves, because the tooth form of the kerve and the tooth form of installation tool can not be fully engaged against, cause load centralization in minority
Kerve in, easily cause load overload that kerve bears and destroy；Fig. 3 is the structural representation of single kerve short-tail rivet,
Although single kerve can reduce the limitation of operation difficulty, annular groove and tooth due to installation tool structure to a certain extent, composition
Round-corner transition radius distance value between the middle smooth linear section of annular groove and the tapered feature of afterbody is very small, is installed in rivet
Cheng Zhong, kerve produce larger stress concentration effect in the presence of axial tension, also easily cause the damage of kerve.
Therefore, how a kind of Bobtail tension rivet is provided, can effectively solve the problem that short-tail and erector in rivet setting process
Tool is quick, efficiently coordinates, and reduces the effect of kerve stress concentration, so as to protect Bobtail tension rivet to be not damaged by, while realizes drawing
The Fast Installation of rivet is the technical problem of those skilled in the art's urgent need to resolve.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Bobtail tension rivet, can effectively solve the problem that and pacifies in rivet
During dress the problem of stress concentration, so as to protect Bobtail tension rivet to be not damaged by, while the Fast Installation of pulling rivet is realized.
To achieve the above object, the utility model provides following technical scheme：
A kind of Bobtail tension rivet, including rivet and the collar with the rivets, the rivet include what is be sequentially connected
Ailhead, polished rod, annular tight lock part and short-tail, the short-tail include the lock part that is connected with the annular tight lock part, and with institute
That states that lock part is connected expands Access Division, and the lock part expands Access Division with described, and the annular tight lock part passes through arc
Shape transition structure connects.
Preferably, the Access Division of expanding is ball bumps structure.
Preferably, the Access Division of expanding includes the first arc segment, the second arc segment and connection first arc
Shape section and the column section of second arc segment.
Preferably, the rear end face for expanding Access Division is vertical end face.
Preferably, it is additionally provided with along the circumference of the ailhead and the junction of the polished rod for reducing unloading for stress concentration
Lotus groove.
Preferably, the outer surface of the annular tight lock part is provided with the rivet thread and rivet screw channel to distribute alternately.
Preferably, the rivet screw channel is the smooth and continuous cambered surface for the circular arc composition that tri- sections of radiuses of b, c do not wait by a,
And the cambered surface radius of the corresponding cambered surface is Ra, Rb, Rc, the Ra ＞ Rb ＞ Rc, the Ra are the two neighboring rivet spiral shell
Tooth (the distance between 0.3-0.55 times；The angle of the tangent line of the circular arc a and the axis of the annular tight lock part is β, its
In, 40 °≤β≤48 °；The lead angle of the rivet thread is α, wherein 2.5 °≤α≤3.5 °.
Preferably, the axial length for expanding Access Division is L, and the external diameter of the annular tight lock part is d, wherein, L=
(0.9-1.1)×d；The maximum radial width for expanding Access Division is e, and the external diameter of the annular tight lock part is d, wherein, e=
(0.75-0.95)×d。
Preferably, the taper of the lock part is 2-8 degree.
Preferably, by the first side plate bending being sequentially connected, conical surface section and the second side plate bending form the lock part.
Preferably, the smallest radial width of the conical surface section is d1, and the external diameter of the annular tight lock part is d, wherein, 0.5d
≤d1≤0.9。
Preferably, the collar includes cylindrical sleeves and the flange being connected with the cylindrical sleeves.
Preferably, the cylindrical sleeves include the conical surface introduction segment coordinated with installation tool, for increasing the resistance of frictional force
Sliding section, and the cooperation section coordinated with the installation tool, described anti-skid section is straight knurled portions.
Preferably, stepped hole is provided with the inner face of the flange, the stepped hole includes macropore and aperture, described
A diameter of C of macropore, a diameter of B of the aperture, wherein C=(1-1.2) × B, and the depth of the stepped hole are the method
Blue thickness and 2 times of rivet thread spacing sums.
Preferably, described anti-skid section of length L1 is 1-4 times of the distance between two neighboring rivet thread.
Preferably, profiling packing ring is additionally provided between the collar and connected component, the hardness of the profiling packing ring is big
In equal to 42HRC.
As can be seen from the above technical solutions, the Bobtail tension rivet disclosed in the utility model embodiment, including rivet and
With the collar of rivets, rivet includes the ailhead being sequentially connected, and polished rod, annular tight lock part and short-tail, short-tail includes and annular
The connected lock part of tight lock part, and what is be connected with lock part expand Access Division, and lock part is with expanding Access Division, and ring lock
Tight portion is connected by arc-shaped transition structure.During work, the axially position locking end of claw in the lock part and installation tool of short-tail
Face locking, the concave sphere profile department cooperation for expanding Access Division and claw of short-tail, in the lock part of short-tail and the lock of claw
Under the axial restriction effect in not-go-end face, claw is fully engaged against with short-tail, automatic alignment, is automatically positioned, therefore is realizing rivet, set
The fast positioning of ring, be not in the phenomenon of stress concentration in rivet setting process, so as to be effectively protected under conditions of installing
Bobtail tension rivet is not damaged by, while realizes the Fast Installation of pulling rivet.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below to embodiment or
The required accompanying drawing used is briefly described in description of the prior art, it is clear that, drawings in the following description are only
Embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to the accompanying drawing of offer.
Fig. 1 is the structural representation of more kerve short-tail rivets disclosed in prior art；
Fig. 2 is I mplifying structure schematic diagrams in Fig. 1；
Fig. 3 is the structural representation of prior art list kerve short-tail rivet；
Fig. 4 is the structural representation of the Bobtail tension rivet disclosed in the utility model embodiment；
Fig. 5-Fig. 6 is Fig. 4 I mplifying structure schematic diagrams；
Fig. 7 is Fig. 4 II mplifying structure schematic diagrams；
Fig. 8 is the structural representation of the collar disclosed in the utility model embodiment；
Fig. 9 is diagrammatic cross-sections of this Fig. 8 along E-E directions.
Figure 10 is the assembling structure schematic diagram of the rivet and the collar disclosed in the utility model embodiment；
Figure 11 is the structural representation that the Bobtail tension rivet disclosed in the utility model embodiment coordinates with installation tool；
Figure 12 is the structural representation of the Bobtail tension rivet with profiling packing ring disclosed in the utility model embodiment.
Wherein, each component names are as follows：
1- rivets, 11- ailheads, 111- compensating grooves, 12- polished rods, 13- annular tight lock parts, 131- rivet threads, 132- rivets
Screw channel, 14- short-tails, 141- lock parts, the side plate bendings of 1411- first, 1412- conical surface sections, the side plate bendings of 1413- second, 142- expand
Access Division, 2- are connected component, the 3- collars, 31- cylindrical sleeves, 311- introduction parts, the straight knurled portions of 312-, 313- auxiliary sections, 32-
Flange, 33- collar threads, 34- collar screw channels, 4- installation tools, 41- molding die cavities, 411- tapered slopes, the 412- faces of cylinder,
42- claws, 421- pyramidal slips face, 422- sphere profile departments, 5- profiling packing rings.
Embodiment
In view of this, core of the present utility model is to provide a kind of Bobtail tension rivet, can effectively solve the problem that and pacifies in rivet
During dress the problem of stress concentration, so as to protect Bobtail tension rivet to be not damaged by, while the Fast Installation of pulling rivet is realized.
In order that those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.
As shown in figure 4, the Bobtail tension rivet disclosed in the utility model embodiment, including rivet 1 and coordinate with rivet 1
The collar 3, rivet 1 include the ailhead 11 being sequentially connected, and polished rod 12, annular tight lock part 13 and short-tail 14, short-tail 14 includes and annular
The connected lock part 141 of tight lock part 13, and what is be connected with lock part 141 expand Access Division 142, and lock part 141 is with expanding card
Socket part 142, and annular tight lock part 13 are connected by arc-shaped transition structure.
During work, the axially position locking end face locking of the lock part 141 and claw 42 in installation tool 4 of short-tail 14 is short
Tail 14 expands Access Division 142 and the concave sphere profile department cooperation of claw 42, in lock part 141 and the claw 42 of short-tail 14
Locking end face axial restriction effect under, claw 42 is fully engaged against with short-tail 14, automatic alignment, is automatically positioned, therefore in reality
Be not in the phenomenon of stress concentration in rivet setting process under conditions of existing rivet, the fast positioning of the collar, installation, so as to
It is effectively protected Bobtail tension rivet to be not damaged by, while realizes the Fast Installation of pulling rivet.
Further, it is ball bumps structure to expand Access Division 142.
Further, expanding Access Division 142 includes the first arc segment, the first arcuate section of the second arc segment and connection
The column section of section and the second arc segment.
It is to be understood that shape of first arc segment with the second arc segment finger-type into the outer wall for expanding Access Division 142
Shape, top surface and the bottom surface of column section are horizontal plane.
Further, the rear end face of Access Division 142 is expanded for vertical end face, it is necessary to explain, rear end mentioned here
Face refers to one end end face away from annular tight lock part.
In order to avoid in installation process, Bobtail tension rivet axial direction is sent out because shape drastically changes and produces stress concentration
The risk of raw broken end, the compensating groove for reducing stress concentration is additionally provided with along the circumference of ailhead 11 and the junction of polished rod 12
111。
As shown in figure 5, the outer surface of annular tight lock part 13 is provided with the rivet thread 131 and rivet screw channel to distribute alternately
132.Wherein, rivet screw channel 132 is the smooth and continuous cambered surface for the circular arc composition that tri- sections of radiuses of b, c do not wait by a, and correspondingly
The cambered surface radius of cambered surface is Ra, Rb, Rc, and Ra ＞ Rb ＞ Rc, Ra are numerically the 0.3- of the distance between two neighboring thread 131
0.55 times.
It should be noted that the angle of circular arc a tangent line and the axis of annular tight lock part 13 is β, wherein, 40 °≤β≤
48 °, the lead angle of spiral shell rivet thread 131 is α, wherein 2.5 °≤α≤3.5 °.It is arranged such, Bobtail tension rivet enters with the collar 3
When row coordinates, the radial compression that annular tight lock part 13 bears the main fricting working surface of installation tool with the collar 3 acts on, short so as to complete
Tail pulling rivet is fastenedly connected, while facilitates the fixation of suspension status lower collar 3.
As shown in fig. 7, the Bobtail tension rivet disclosed in the utility model embodiment, the axial length of Access Division 142 is expanded
For L, the external diameter of annular tight lock part 13 is d, wherein, L=(0.9-1.1) × d；The maximum radial width for expanding Access Division 142 is
E, the external diameter of annular tight lock part 13 is d, wherein, e=(0.75-0.95) × d；The taper of lock part 141 is 2-8 degree.
It should be noted that lock part 141 is by the first side plate bending 1411 being sequentially connected, the cambered surface of conical surface section 1412 and second
Section 1413 forms, and wherein the smallest radial width of conical surface section 1412 is d1, and the external diameter of annular tight lock part 13 is d, wherein, 0.5d≤
d1≤0.9。
It is arranged such, can further reduces the phenomenon of stress concentration when installation tool coordinates with short-tail 14, so as to protect
Bobtail tension rivet is not damaged by.
Fig. 8 is refer to, the collar 3 includes cylindrical sleeves 31 and the flange 32 being connected with cylindrical sleeves 31, and component is tight when carrying out
Gu when, Bobtail tension rivet is passed through be connected component 2 first, then the collar 3 is inserted in connected component 2, the collar 3 is drawn by short-tail
Rivet is fastenedly connected with connected component 2.
It should be noted that cylindrical sleeves 31 include the introduction segment 311 coordinated with installation tool 4, increase the resistance of frictional force
Sliding section 312 and the cooperation section 313 coordinated with installation tool 4.It is to be understood that introduction segment 311 is certain length, angle
Chamfering, its effect be, ensures that the collar 3 is easier centering with installation tool 4 during installation.
Anti-skid section 312 is straight knurled portions, and straight annular knurl is axially distributed on cylindrical sleeves 31, due to the initial deformation of the collar 3
Power is bigger, and reliability in installation process tool is higher, thus straight knurled portions can further increase the collar 3 frictional force and
Initial deformation power of the collar 3 in die cavity is molded.
It should be further stated that in order to reduce cutting blade stress, extend cutting-tool's used life, while ensure to cover
Ring 3 when axially cutting can back chipping, the utility model embodiment is provided with stepped hole on the inner face of flange 32.
As shown in figure 8, the stepped hole disclosed in the utility model embodiment includes macropore and aperture, a diameter of C of macropore,
A diameter of B of aperture, wherein C=(1-1.2) × B；Anti-skid section 312 of length L1 between two neighboring collar thread 33 away from
From 1-4 times；The depth of stepped hole is the thickness and 2 times of spacing sums of thread 131 of flange 32.It is arranged such, can greatly improves
Intensity after the installation of the collar 3.
It should be noted that profiling packing ring 5 is additionally provided between the collar 3 and connected component 2.It is it is to be understood that imitative
The thickness of shape packing ring is more than or equal to 42HRC, and it is to expand the application of Bobtail tension rivet to be arranged such, and is out-of-flatness, different
The operating mode that is fastenedly connected between shape component provides a solution.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (16)
1. a kind of Bobtail tension rivet, including rivet (1) and the collar (3) with the rivet (1) cooperation, it is characterised in that described
Rivet (1) includes the ailhead (11) being sequentially connected, polished rod (12), annular tight lock part (13) and short-tail (14), the short-tail (14)
Clamping is expanded including the lock part (141) being connected with the annular tight lock part (13), and with what the lock part (141) was connected
Portion (142), the lock part (141) expands Access Division (142) with described, and the annular tight lock part (13) passes through arc mistake
Cross structure connection.
2. Bobtail tension rivet according to claim 1, it is characterised in that the Access Division (142) of expanding is ball bumps
Structure.
3. Bobtail tension rivet according to claim 1, it is characterised in that the Access Division (142) of expanding includes the first arc
Shape section, the second arc segment and the column section for connecting first arc segment and second arc segment.
4. Bobtail tension rivet according to claim 1, it is characterised in that it is described expand Access Division (142) rear end face be
Vertical end face.
5. Bobtail tension rivet according to claim 1, it is characterised in that along the ailhead (11) and the polished rod (12)
The circumference of junction is additionally provided with the compensating groove (111) for reducing stress concentration.
6. Bobtail tension rivet according to claim 1, it is characterised in that the outer surface of the annular tight lock part (13) is set
There is the rivet thread (131) and rivet screw channel (132) to distribute alternately.
7. Bobtail tension rivet according to claim 6, it is characterised in that the rivet screw channel (132) is by a, tri- sections of b, c
The smooth and continuous cambered surface for the circular arc composition that radius does not wait, and the cambered surface radius of the corresponding cambered surface is Ra, Rb, Rc are described
Ra ＞ Rb ＞ Rc, the Ra are 0.3-0.55 times of the distance between the two neighboring rivet thread (131)；The circular arc a
The angle of axis of tangent line and the annular tight lock part (13) be β, wherein, 40 °≤β≤48 °；The rivet thread (131)
Lead angle be α, wherein 2.5 °≤α≤3.5 °.
8. Bobtail tension rivet according to claim 1, it is characterised in that the axial length for expanding Access Division (142)
For L, the external diameter of the annular tight lock part (13) is d, wherein, L=(0.9-1.1) × d；It is described to expand Access Division (142) most
Big radial width is e, and the external diameter of the annular tight lock part (13) is d, wherein, e=(0.75-0.95) × d.
9. Bobtail tension rivet according to claim 1, it is characterised in that the taper of the lock part (141) is 2-8 degree.
10. Bobtail tension rivet according to claim 1, it is characterised in that the lock part (141) by be sequentially connected
One side plate bending (1411), conical surface section (1412) and the second side plate bending (1413) composition.
11. Bobtail tension rivet according to claim 10, it is characterised in that the smallest radial of the conical surface section (1412) is wide
To spend for d1, the external diameter of the annular tight lock part (13) is d, wherein, 0.5d≤d1≤0.9.
12. Bobtail tension rivet according to claim 6, it is characterised in that the collar (3) include cylindrical sleeves (31) and
The flange (32) being connected with the cylindrical sleeves (31).
13. Bobtail tension rivet according to claim 12, it is characterised in that the cylindrical sleeves (31) include and erector
Have (4) coordinate conical surface introduction segment (311), for increasing anti-skid section (312) of frictional force, and with the installation tool (4)
The cooperation section (313) of cooperation, and described anti-skid section (312) are straight knurled portions.
14. Bobtail tension rivet according to claim 12, it is characterised in that set on the inner face of the flange (32)
There is stepped hole, the stepped hole includes macropore and aperture, a diameter of C of the macropore, a diameter of B of the aperture, wherein C=
(1-1.2) × B, and the depth of the stepped hole is the thickness and 2 times of rivet thread (131) spacing sums of the flange (32).
15. Bobtail tension rivet according to claim 13, it is characterised in that the length L1 of anti-skid section (312) is phase
1-4 times of the distance between adjacent two rivet threads (131).
16. Bobtail tension rivet according to claim 1, it is characterised in that between the collar (3) and connected piece (2)
Profiling packing ring (5) is additionally provided with, the hardness of the profiling packing ring (5) is more than or equal to 42HRC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720768009.6U CN206988262U (en) | 2017-06-28 | 2017-06-28 | A kind of Bobtail tension rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720768009.6U CN206988262U (en) | 2017-06-28 | 2017-06-28 | A kind of Bobtail tension rivet |
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| Publication Number | Publication Date |
|---|---|
| CN206988262U true CN206988262U (en) | 2018-02-09 |
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ID=61400381
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720768009.6U Active CN206988262U (en) | 2017-06-28 | 2017-06-28 | A kind of Bobtail tension rivet |
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| CN (1) | CN206988262U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218280A (en) * | 2017-06-28 | 2017-09-29 | 上海奥达科股份有限公司 | A kind of assembly and disassembly methods of Bobtail tension rivet and Bobtail tension rivet |
-
2017
- 2017-06-28 CN CN201720768009.6U patent/CN206988262U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218280A (en) * | 2017-06-28 | 2017-09-29 | 上海奥达科股份有限公司 | A kind of assembly and disassembly methods of Bobtail tension rivet and Bobtail tension rivet |
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