CN211708668U

CN211708668U - Positioning blind rivet and zero point positioning device thereof

Info

Publication number: CN211708668U
Application number: CN202020151335.4U
Authority: CN
Inventors: 覃勇; 魏显奎; 邱详宇; 李子言
Original assignee: Shanghai Shangfei Aircraft Equipment Manufacturing Co ltd
Current assignee: Shanghai Shangfei Aircraft Equipment Manufacturing Co ltd
Priority date: 2020-02-04
Filing date: 2020-02-04
Publication date: 2020-10-20
Anticipated expiration: 2030-02-04

Abstract

The utility model provides a location blind rivet and positioner at zero point thereof, wherein should fix a position the blind rivet and include: the nail body is provided with a guide head, a positioning section, a supporting section, an installing head and a pin hole, wherein the pin hole penetrates through the nail body so as to open at the guide head and the installing head; this support section sets up in this nail body middle section to connect this guide head and location section, wherein this support section includes: the transition part is arc-shaped, and the arc surface of the transition part is in tangential transition with the wall surface of the support part; the positioning section extends out from the transition part and is in a tapered cylinder shape; the mounting head extends out from the positioning section, thereby effectively solving the problem that the stress concentration of the transition part of the positioning blind rivet is easy to generate cracks, properly disposing the stress position, avoiding the stress accumulation at the non-supporting part to generate cracks, and improving the integral stress level and service life of the positioning blind rivet.

Description

Positioning blind rivet and zero point positioning device thereof

Technical Field

The utility model relates to a zero point location technical field especially relates to the location blind rivet that uses among the positioning system at zero point and adopt this location blind rivet's positioner at zero point.

Background

The zero point positioning system is a unique positioning and locking device, and can keep a workpiece from one station to another station, from one process to another process, or from one machine tool to another machine tool, and the zero point is always kept unchanged. Therefore, the auxiliary time for re-aligning the zero point can be saved, the working continuity is ensured, and the working efficiency is improved.

The rivet in the zero point positioning system is mainly used for connecting the supporting plate and the clamping mechanism, the supporting plate and the clamping mechanism are connected in a rigid connection mode, and in the clamping process, the rivet is prone to deviation in position, so that the clamping force is unbalanced when the steel balls are clamped, the clamping force is unstable, and safety accidents are prone to being caused.

Therefore, in order to solve the above problems, there is provided a set rivet as in the prior art, patent No.: CN201620215269.6, the locating blind rivet is composed of an installation end head, an inclined plane locating part, a steel ball clamping part and a leading-in end head which are arranged from top to bottom in sequence; the diameter of the inclined plane positioning part is sequentially reduced from top to bottom, and the upper surface of the inclined plane positioning part is a horizontal plane; the outer surface of the steel ball clamping part consists of a straight line section and an inclined plane section, the straight line section and the inclined plane section form an included angle alpha, and the included angle alpha is more than 90 degrees and less than 180 degrees. The utility model has the advantages that: the inclined plane positioning part of the positioning rivet is in clearance fit with the conical surface of the central hole of the shell, so that the degree of freedom of the positioning rivet X, Y in the direction is limited; the upper surface of the bevel positioning part is attached to the lower surface of the supporting plate, so that the Z-direction freedom degree of the positioning blind rivet is limited; the positioning blind rivet realizes precision centering in the clamping process, so that the stability of clamping force is improved.

However, after the blind rivet is used for a long time, the inventor gradually finds that certain defects exist, for example, the transition part of the blind rivet can generate cracks due to stress concentration in the actual use process, so that production accidents are easily caused on the one hand, the service life of the blind rivet is greatly reduced on the other hand, the phenomenon is not easily noticed by naked eyes in the hidden initial stage, problems such as reduction of processing precision and the like can be caused, the unknown user often can be confused and unconscious, but the source of the problem can not be found, and great inconvenience is brought to production.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a positioning blind rivet and zero point positioning device thereof, which can solve the problem of crack generation easily caused by stress concentration at the transition part of the positioning blind rivet.

In order to achieve the above object, according to an aspect of the present invention, there is provided a positioning blind rivet, comprising: the nail body is provided with a guide head, a positioning section, a supporting section, an installing head and a pin hole, wherein the pin hole penetrates through the nail body so as to form an opening at the guide head and the installing head; the support section sets up nail body middle section in order to connect guide head and location section, wherein the support section includes: the transition part is arc-shaped, and the arc surface of the transition part is in tangential transition with the wall surface of the support part; the positioning section extends out from the transition part and is in a tapered cylinder shape; the mounting head extends out from the positioning section.

In a possible preferred embodiment, the guide head comprises: the guide surface, the transition surface and the tensioning surface are respectively arranged on two sides of the transition surface in an inclined mode, and the length relation between the height A of the guide surface, the height B of the transition surface and the height C of the tensioning surface is A > C > B.

In a possible preferred embodiment, the angle a, c of the guide and tensioning surfaces to the transition surface is 135 °.

In a possible preferred embodiment, an annular groove is further provided at the transition of the positioning section and the mounting head.

In a possible preferred embodiment, the support is cylindrical and extends from the rear side of the guide head, wherein the tensioning surface is in an oblique transition with the wall of the support, so as to define a tensioning zone at the junction of the two.

In order to achieve the above object, according to the present invention, there is also provided a zero point positioning device, comprising: the positioning device comprises a zero point positioning unit, a positioning blind rivet, an angular blind rivet and a carrier plate, wherein the positioning blind rivet is made of any one of the positioning blind rivets in the preferred embodiment.

Through the utility model provides a this location blind rivet and positioner at zero point thereof can effectively solve the easy problem that crackle was produced to location blind rivet transition portion stress concentration for atress position department can obtain proper processing, avoids stress to gather at non-supporting part department and produces the crackle, thereby has improved the whole atress level of location blind rivet and whole life-span, and then has improved the stability, reliability and the relative precision that adopt this type of location blind rivet processing production, and has effectively reduced the production material cost and the assembly required precision of this type of location blind rivet, makes the utility model provides a location blind rivet has practical application and commercial spreading value.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a schematic view of the positioning blind rivet structure of the present invention;

FIG. 2 is a schematic view of the fixing structure of the positioning rivet on the carrier plate according to the present invention;

FIG. 3 is a schematic sectional view of the positioning rivet and the positioning pin of the present invention;

fig. 4 is a schematic view of the sectional structure of the positioning blind rivet of the present invention applied to the zero point positioning system.

The guide head 1, the positioning section 2, the support section 3, the mounting head 4, the pin hole 5, the positioning pin 6, the pin head 61, the guide surface 11, the transition surface 12, the tensioning surface 13, the zero point positioning unit 7, the steel ball 71, the support part 31, the transition part 32, the positioning surface 21, the positioning wall 22, the carrier plate 8, the angular rivet 9, the annular groove 41 and the carrier plate interface 81.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained without creative efforts by those skilled in the art shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in combination with the prior art according to specific situations.

Referring to fig. 1 to 4, the present invention provides a positioning blind rivet, which is mainly used for being adapted to a zero point positioning unit to form positioning locking, and can also be matched with an angular blind rivet 9 in the whole zero point positioning system to adjust and ensure the whole positioning accuracy deviation of the zero point positioning system.

In order to mainly solve the problem that the positioning rivet transition part 32 is prone to crack due to stress concentration, in a preferred embodiment, as shown in fig. 1, the positioning rivet comprises: the nail body is provided with guiding head 1, location section 2, support section 3, installation head 4 and pinhole 5 respectively everywhere at the nail body, and wherein this pinhole 5 runs through this nail body to in this guiding head 1 and 4 openings of installation head, still be equipped with the screw thread in this pinhole 5 in addition and with the dowel 6 that supplies the adaptation screw thread to join in marriage, wherein guiding head 1 sets up the top of nail body, it includes: a guide surface 11, a transition surface 12 and a tension surface 13, the guide surface 11 and the tension surface 13 being arranged obliquely on either side of the transition surface 12, respectively, the angles a, C of the guide surface 11 and the tension surface 13 with the transition surface 12 being 135 ° in the preferred embodiment, and the relationship of the length of the height a of the guide surface 11, the height B of the transition surface 12 and the height C of the tension surface 13 being a > C > B, thereby defining the guide head 1 which is disc-shaped.

Specifically, since the positioning rivet needs to be connected through the positioning pin 6 when being coupled with the carrier plate 8, in the prior art, the pin head 61 of the positioning pin 6 is at least partially accommodated in the pin hole 5, so that a counter bore needs to be added to the pin hole 5 of the guide head 1 section, thereby increasing the processing cost and the processing requirement of the positioning rivet on one hand, and increasing the assembly difficulty on the other hand, the pin head 61 of the positioning pin 6 needing to be adapted can be embedded into the counter bore, and thus certain requirements on the precision and the assembly of the positioning pin 6 needing to be adapted are provided.

And the utility model discloses a solve this problem, the inventor then adopts above-mentioned scheme to change the structure of this guide head 1, this dished guide head 1 can reduce the material consumption cost on the one hand, on the other hand is because the guide head 1 of this structure is direct offsets with the round pin head 61 of this shop bolt 6, consequently, need not to set up the counter bore, directly insert this pinhole 5 back through shop bolt 6, support shop bolt 6 through this round pin head 61 and this guide head 1 contact, can make this support plate 8 and this location blind rivet can be firm be connected, thereby reduced to shop bolt 6 assembly and required precision.

It should be noted that, since the guiding head 1 is designed to be disc-like, when the guiding head 1 of the structure is inserted into the zero point positioning unit 7, the steel ball 71 exerts resistance on the tensioning surface 13, and the pin head 61 of the positioning pin 6 exerts fastening force on the guiding surface 11, so that the two acting forces keep force balance in the area of the transition surface 12, and the disc-like structure can better resist deformation force of the two, thereby improving reliability of the guiding head 1, and promoting more stable connection of the carrier plate 8 and the zero point positioning unit 7.

Wherein this support section 3 sets up the middle section at this location blind rivet for connect this guide head 1 and location section 2, under preferred embodiment, this support section 3 includes: a support portion 31 and a transition portion 32, wherein the support portion 31 is cylindrical and extends from the rear side of the guide head 1, and the tightening surface 13 and the wall surface of the support portion 31 are in an inclined transition shape to define a tightening zone at the junction of the two, so as to allow the steel ball 71 in the zero point positioning unit 7 to clamp the guide head 1 in the tightening zone, thereby ensuring a stable fit with the zero point positioning unit 7.

And this transition portion 32 is preferably an arc in this embodiment, and it extends from this supporting portion 31, and the cambered surface of this transition portion 32 is tangent transition with the wall of this supporting portion 31, thereby make this transition portion 32 department bear the stress of this support plate 8 can be along with the cambered surface guide to this supporting portion 31 on, compare with prior art, because in the scheme of the utility model, this transition portion 32 is the cambered surface and is tangent transition with the wall of this supporting portion 31, rather than only adopt the cambered surface and the unconditional connection transition of the wall of this supporting portion 31, consequently in both transition portions 32, there is not stress transmission separation region, consequently is difficult to gather stress in somewhere on this stress transmission route, thereby has solved the problem that stress is gathered.

And prior art has then adopted the chamfer transition, consequently forms a stress gathering zone in the transitional coupling department of chamfer easily, thereby cause here crackle to produce easily, and the utility model discloses a cambered surface of this transition portion 32 of design is tangent scheme of transition with the wall of this supporting part 31, makes whole stress transmission region comparatively unobstructed, has eliminated the stress accumulation region from this, is difficult to cause the crackle by stress on making the support section 3, has solved prior art's defect from this, makes the life-span greatly increased of this location blind rivet, and has improved the reliability of the positioning system at zero point that adopts this type of location blind rivet, has brought the facility for production.

Wherein the positioning section 2 extends from the transition portion 32 of the supporting portion 31 and is cylindrical with a certain taper, and the cylindrical surface of the positioning section 2 is provided with a positioning surface 21, as shown in fig. 4, wherein the positioning surface 21 changes its inclination angle with the taper of the positioning section 2 in the present embodiment, so as to fit with the positioning wall 22 in the zero point positioning unit 7, therefore, after the positioning blind rivet is inserted into the zero point positioning unit 7, through the joint of the positioning surface 21 and the positioning wall 22, the positioning and fixing effect can be formed, as shown in fig. 3, the positioning surface 21 and the supporting portion 31 form a curved surface connection through the transition portion 32, therefore, the stress on the positioning surface 21 is conveniently guided to be transmitted to the supporting part 31 from the cambered surface, the smoothness of a stress transmission path is ensured, the problem of stress concentration is solved, and the possibility of cracks at the connecting part of the positioning section 2 and the transition part 32 due to stress accumulation is prevented.

As shown in fig. 2, the mounting head 4 extends from the positioning section 2 to the bottom end of the nail body, wherein the mounting head 4 is in a cylindrical state, and the mounting head 4 is engaged with the upper surface of the positioning section 2 at a right angle so as to be inserted into the interface 81 on the carrier plate 8, and the upper surface of the positioning section 2 abuts against the plate surface at the position of the interface 81 on the carrier plate 8, thereby forming a positioning, so that the positioning rivet can be connected on the carrier plate 8 in a positioning manner. On the other hand, in the preferred embodiment, an annular groove 41 is further provided at the transition of the positioning segment 2 and the mounting head 4, so that the edge of the adaptor 81 fitted on the carrier plate 8 can penetrate into the annular groove 41, so as to finely adjust the position of the positioning rivet in the adaptor 81 of the carrier plate 8 during assembly, avoid interference and facilitate the fixed connection of the two.

Referring to fig. 4, in the actual use process, the positioning blind rivet of the present invention is inserted through the opening of the guide head 1 through the positioning pin 6, and is connected to the positioning blind rivet through the thread in the pin hole 5, after the positioning pin 6 is rotated to pass through the opening of the mounting head 4, the mounting head 4 is inserted into the adapter 81 of the carrier plate 8, and the positioning pin 6 is tightened, so that the tail of the positioning pin 6 is connected to the threaded hole in the adapter 81 of the carrier plate 8, thereby locking the position of the positioning blind rivet on the carrier plate 8 through the positioning pin 6. In this configuration, therefore, if the positioning pin 6 is screwed for the fastening effect, on the one hand the pin head 61 will exert a force on the guide head 1.

On the other hand, the upper surface of the positioning section 2 is also subjected to the acting force of the plate surface at the interface 81 of the carrier plate 8, when the carrier plate 8 is inserted into the zero point positioning unit 7 through the positioning rivet, the steel ball 71 generates clamping tension force at the tensioning surface 13, and at this time, a part of the force can form force balance with the acting force of the pin head 61 from the disc-shaped guide head 1, and the stress borne by the positioning surface 21 on the positioning section 2 after being matched with the positioning wall 22 of the zero point positioning unit 7 and the acting force borne by the upper surface of the positioning section 2 can be transmitted to the supporting part 31 through the transition part 32, so that each stressed position can be properly treated, the stress is prevented from accumulating at the non-supporting part 31 to generate cracks, the integral stress level of the positioning rivet is improved, and the stability, reliability and relative precision of production positioning are improved, and effectively reduce material cost and assembly accuracy requirement.

On the other hand, the utility model also provides a positioner at zero point, it includes: the positioning device comprises a zero point positioning unit, a positioning rivet, an angular rivet and a carrier plate, wherein the positioning rivet is made of the positioning rivet in any one of the preferred embodiments.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the appended claims and their full scope and equivalents, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning blind rivet, comprising: the nail body is provided with a guide head, a positioning section, a supporting section, an installing head and a pin hole, wherein the pin hole penetrates through the nail body so as to form an opening at the guide head and the installing head; the support section sets up nail body middle section in order to connect guide head and location section, wherein the support section includes: the transition part is arc-shaped, and the arc surface of the transition part is in tangential transition with the wall surface of the support part; the positioning section extends out from the transition part and is in a tapered cylinder shape; the mounting head extends out from the positioning section.

2. The positioning tack of claim 1, wherein the guide head comprises: the guide surface, the transition surface and the tensioning surface are respectively arranged on two sides of the transition surface in an inclined mode, and the length relation between the height A of the guide surface, the height B of the transition surface and the height C of the tensioning surface is A > C > B.

3. The setting rivet according to claim 2, wherein the angles a, c of the guide and tensioning surfaces to the transition surface are 135 °.

4. The positioning blind rivet of claim 1, wherein an annular groove is further provided at the transition of the positioning section and the mounting head.

5. The retaining pull stud of claim 2, wherein the support portion is cylindrical and extends from the rear side of the guide head, and wherein the tensioning surface transitions obliquely from the support portion wall to define a tensioning zone at the junction of the two.

6. A zero point positioning device, comprising: the positioning device comprises a zero point positioning unit, a positioning rivet, an angular rivet and a carrier plate, and is characterized in that the positioning rivet is made of the positioning rivet according to any one of claims 1 to 5.