CN216563561U - Stud unit, connecting mechanism and die for press riveting connecting mechanism - Google Patents

Abstract

The utility model discloses a stud unit, which is used for being connected with a plate, wherein the plate is provided with a first through hole, and the stud unit comprises: the stud comprises a body and an arc-shaped part formed on one side of the body, and the torsion piece is sleeved between the body and the arc-shaped part, and two ends of the torsion piece are fixedly connected with the body and the arc-shaped part respectively; the outer diameters of the body and the torsion piece are smaller than the diameter of the first through hole, and the outer diameter of one end, away from the torsion piece, of the arc-shaped part is larger than the diameter of the first through hole; arc portion and torsion piece are all connected with first through-hole through pressing the rivet. The utility model has at least the following advantages: the connecting mechanism is simple, only a pressure riveting die with set pressure riveting force is required to act on the stud, so that the plate deforms and flows into the gap of the torsion piece, the resistance generated by the metal form is utilized to provide the torsion, the pushing force is exerted, the connecting strength is high, the plate cannot fall off, and the production cost is not increased; and the plate and the stud can be tightly combined, no visible gap exists on the section, and the connection is firm.

Description

Stud unit, connecting mechanism and die for press riveting connecting mechanism

Technical Field

The utility model relates to the technical field of fasteners, in particular to a stud unit, a connecting mechanism and a die for a press riveting connecting mechanism.

Background

With the continuous development of industry, the requirement for connecting two materials made of the same material is wider and wider, and particularly, the connection between two copper pieces, especially the copper pieces used in conductive equipment, needs reliable performance after connection and also needs to avoid the generation of a gap at the joint of the two copper pieces.

Because the copper parts used for electric conduction are low in hardness and are not suitable for the traditional riveting mode, the connection between the copper parts is usually realized by interference fit at present, but after the copper parts in the interference fit are combined by mutual deformation, the friction force of the contact surfaces provides torsion and push-out force, so that the mechanical strength of the connection between the copper parts is low and unreliable; and affected by the tolerance of the copper plate hole, the tolerance of the outer diameter of the stud is seriously affected, the two copper parts cannot be perfectly matched, the connection performance is extremely low, the falling risk exists, or the copper scraps and the stud are seriously deformed due to extrusion, and the existence of a gap is difficult to avoid on the contact surface of the connection part, so that the electric conductivity of the copper parts is affected.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a stud unit, a connecting mechanism and a die for a press riveting connecting mechanism, which are used for solving the problems that the connecting performance between copper pieces is poor, and the contact surface has a gap to influence the conductivity.

The embodiment of the application discloses a stud unit, a connecting mechanism and a die for a press riveting connecting mechanism, the connecting mechanism is simple, only the press riveting die with the set press riveting force is required to act on a stud, an upper die exerts a force on an arc-shaped part, a convex circular ring on a lower die exerts a force on a plate, the plate deforms and flows into a gap of a torsion piece on the stud, the stud cannot deform, the influence of tolerance is small, the stud and the plate can be perfectly matched, the resistance generated by metal forms is utilized to provide torsion, the pushing force is exerted, the connecting strength is high, the plate cannot fall off, and compared with a traditional connecting method, the production cost is not increased; and the plate and the stud can be tightly combined, no visible gap exists on the section, and the connection is firm.

Wherein, this double-screw bolt unit is used for being connected with panel, be equipped with first through-hole on the panel, include:

the bolt comprises a body and an arc-shaped part formed on one side of the body, and the torsion piece is sleeved between the body and the arc-shaped part, and two ends of the torsion piece are fixedly connected with the body and the arc-shaped part respectively;

the outer diameters of the body and the torsion piece are smaller than the diameter of the first through hole, and the outer diameter of one end, away from the torsion piece, of the arc-shaped portion is larger than the diameter of the first through hole.

Furthermore, the plate is made of pure copper.

Furthermore, the stud is made of pure copper.

Further, the torsion member may have a spline or a hexagonal cross section.

Further, the spline teeth can be straight teeth or helical teeth.

Further, the outer diameter of the torsion piece is smaller than or equal to the outer diameter of the body.

Furthermore, the arc part comprises a first end surface and a second end surface which are oppositely arranged, and a first arc surface and a second arc surface which are respectively connected with the first end surface and the second end surface and are oppositely arranged.

Further, the diameter of the first end face is smaller than that of the second end face, and the diameter of the first end face is smaller than that of the through hole.

Further, the diameter of the second end face is 1.05-1.3 times of the diameter of the through hole.

The embodiment of the application further discloses a connecting mechanism, and the connecting mechanism comprises a stud unit and a plate, the stud unit comprises a stud and a torsion piece, the stud comprises a body and an arc-shaped part formed on one side of the body, the torsion piece is arranged between the body and the arc-shaped part, two ends of the torsion piece are respectively connected with the body and the arc-shaped part in a fixed connection mode, and the arc-shaped part and the torsion piece are connected with the first through hole through pressing rivets.

Further, the sheet material flows between the arc-shaped portion and the torsion member, flows into the torsion member gap, and flows between the torsion member and the body through deformation.

Further, after the stud and the plate are riveted, the second end face of the arc-shaped part is flush with the end face of the plate.

The embodiment of the application further discloses a mould for pressing rivet above coupling mechanism, the mould includes the mould and is located go up the mould below and rather than the relative lower mould that sets up, go up the mould can with the second terminal surface of arc portion is contradicted, the lower mould can with the bottom of panel is contradicted, be equipped with the second through-hole in the lower mould, the up end of lower mould is followed be equipped with protruding ring in the outer fringe of second through-hole, when the pressure is riveted, protruding ring can extrude the outer fringe of first through-hole makes stud unit and panel fastening connection.

Further, the second through hole is in clearance fit with the body.

The utility model has the following beneficial effects:

1. the connecting mechanism is simple, only a pressure riveting die with a set pressure riveting force is required to act on the stud, the upper die applies a force to the arc-shaped part, the convex circular ring on the lower die applies a force to the plate, so that the plate deforms and flows into a gap of a torsion piece on the stud, the stud cannot deform, the influence of tolerance is small, the stud and the plate can be perfectly matched, the resistance generated by metal forms is utilized to provide torsion, the pushing force is exerted, the connecting strength is high, the stud cannot fall off, and compared with a traditional connecting method, the production cost is not increased; and the plate and the stud can be tightly combined, no visible gap exists on the section, and the connection is firm.

2. And the lower die is provided with a convex circular ring, and when the lower die is riveted, the convex circular ring can extrude the outer edge of the first through hole to deform the plate, so that the stud unit is fixedly connected with the plate. If the lower die is not provided with the convex circular ring, the force applied to the plate by the die in the press riveting process is small, and the plate cannot be deformed or the plate is deformed to be small, so that the stud unit and the plate cannot be fastened and connected and are easy to fall off.

In order to make the aforementioned and other objects, features and advantages of the utility model comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a stud unit with splines before riveting with a plate in an embodiment of the utility model;

FIG. 2 is an enlarged view of A in FIG. 1 before riveting a stud unit having serrations thereon with a plate in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a stud unit with splines riveted to a plate according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a stud unit having a hexagonal cross section according to an embodiment of the present invention.

Reference numerals of the above figures: 1. a stud; 11. a body; 12. an arc-shaped portion; 121. a first end face; 122. a second end face; 123. a first arc-shaped surface; 124. a second arcuate surface; 2. a plate material; 3. a first through hole; 4. flower teeth; 5. an upper die; 6. a lower die; 7. a second through hole; 8. a convex circular ring; 9. hexagonal cross section.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The stud unit, the connecting mechanism and the die for the press riveting connecting mechanism are simple in structure, only the press riveting die with the set press riveting force is required to act on a stud, the upper die exerts a force on the arc-shaped part, the convex circular ring on the lower die exerts a force on the plate, the plate is deformed and flows into a gap of a torsion piece on the stud, the stud is not deformed, the influence of tolerance is small, the stud and the plate can be perfectly matched, the resistance generated by the metal form is utilized to provide the torsion, the pushing force is exerted, the connecting strength is high, the plate cannot fall off, and compared with a traditional connecting method, the production cost is not increased; and the plate and the stud can be tightly combined, no visible gap exists on the section, and the connection is firm.

This application embodiment stud unit, this stud unit be used for being connected with panel 2, be equipped with first through-hole 3 on panel 2, include:

the bolt comprises a bolt 1 and a torsion piece, wherein the bolt 1 comprises a body 11 and an arc-shaped part 12 formed on one side of the body 11, the torsion piece is sleeved between the body 11 and the arc-shaped part 12, and two ends of the torsion piece are respectively fixedly connected with the body 11 and the arc-shaped part 12;

the outer diameters of the body 11 and the torsion piece are smaller than the diameter of the first through hole 3, and the outer diameter of one end, away from the torsion piece, of the arc-shaped part 12 is larger than the diameter of the first through hole 3.

With reference to fig. 1, 2, 3 and 4, in particular, in the present embodiment, the stud unit is used to connect with the plate 2. The plate 2 is provided with a first through hole 3. The plate 2 is made of pure copper. The stud unit comprises a stud 1 and a torsion piece. The stud 1 is made of pure copper. The stud 1 includes a body 11 and an arc portion 12 formed on one side of the body 11. The body 11 may be cylindrical. The arc portion 12 includes a first end surface 121 and a second end surface 122 disposed opposite to each other, and a first arc surface 123 and a second arc surface 124 connected to the first end surface 121 and the second end surface 122, respectively, and disposed opposite to each other. The torsion piece is sleeved between the body 11 and the arc-shaped portion 12, two ends of the torsion piece are fixedly connected with the body 11 and the arc-shaped portion 12 respectively, and the torsion piece is fixed when the riveting is carried out. The outer diameters of the body 11 and the torsion piece are smaller than the diameter of the first through hole 3, so that the stud 1 can be smoothly inserted into the first through hole 3 without any obvious gap. The outer diameter of one end, far away from the torsion piece, of the arc-shaped part 12 is larger than the diameter of the first through hole 3, so that the stud 1 and the first through hole 3 cannot be separated, and the die can be normally riveted.

Specifically, referring to fig. 1 and 3, in this embodiment, the torsion member may be a spline 4. The spline teeth 4 are used for improving the torsion. The spline teeth 4 can be straight teeth or helical teeth.

With particular reference to fig. 4, in an alternative embodiment, the torsion member may also have a hexagonal cross-section 9. The hexagonal cross section 9 can also be used to increase the torque.

Specifically, in this embodiment, the outer diameter of the torsion member is smaller than or equal to the outer diameter of the body 11, so that there is no significant gap between the body 11 and the first through hole 3. The gap between the torsion piece and the plate 2 is used for storing the material which is deformed and flows by the plate 2, so that the stud 1 and the plate 2 can be tightly connected and can not fall off.

Specifically, in the present embodiment, the arc portion 12 includes a first end surface 121 and a second end surface 122 that are oppositely disposed, and a first arc surface 123 and a second arc surface 124 that are connected to the first end surface 121 and the second end surface 122, respectively, and are oppositely disposed. The first end surface 121 and the second end surface 122 are both planar. The first end surface 121 abuts against an end surface of the torsion member. The second end surface 122 can abut against the upper die 5. The diameter of the first end surface 121 is smaller than that of the second end surface 122, so that the second end surface 122 can be clamped above the plate 2 to prevent the stud 1 from being separated from the first through hole 3. The diameter of the first end surface 121 is smaller than that of the through hole, so that the stud 1 and a part of the forming part can enter the first through hole 3, and the press riveting process can be smoothly carried out.

In an optional embodiment, the diameter of the second end surface 122 is 1.05 to 1.3 times of the diameter of the through hole as measured by experimental data, and when riveting, the second end surface 122 can be pressed into the first through hole 3, and the plate 2 and the stud 1 can be tightly connected under the condition that the loss of the plate 2 is small, so that the connection strength is high.

The connecting mechanism of the embodiment of the application comprises a stud unit and a plate 2. The plate 2 is provided with a first through hole 3. The plate 2 is made of pure copper. The stud unit comprises a stud 1 and a torsion piece. The stud 1 is made of pure copper. The stud 1 includes a body 11 and an arc portion 12 formed on one side of the body 11. The body 11 may be cylindrical. The arc portion 12 includes a first end surface 121 and a second end surface 122 disposed opposite to each other, and a first arc surface 123 and a second arc surface 124 connected to the first end surface 121 and the second end surface 122, respectively, and disposed opposite to each other. The torsion piece is arranged between the body 11 and the arc-shaped part 12, and two ends of the torsion piece are respectively fixedly connected with the body 11 and the arc-shaped part 12. The torsion piece can be straight teeth or helical teeth. The arc-shaped part 12 and the torsion piece are fixedly connected with the first through hole 3 through press riveting, the connection is firm, no visible gap exists in the section, and the separation cannot occur.

Specifically, in this embodiment, the plate 2 is deformed and flows between the arc portion 12 and the torsion member, between the torsion member and the body 11, and between the torsion member and the body 11 through the die riveting, so that the plate 2 is tightly connected to the stud 1, and the performance is better.

Specifically, in this embodiment, after the stud 1 and the plate 2 are riveted, the second end surface 122 of the arc-shaped portion 12 is flush with the end surface of the plate 2, so that the conductivity of the product is better. If the second end surface 122 of the arc-shaped portion 12 is not flush with the end surface of the plate 2, the conductivity of the product may be affected if there is a gap.

The die for the connecting mechanism of the rivet pressing device comprises an upper die 5 and a lower die 6, wherein the lower die 6 is located below the upper die 5 and is opposite to the upper die. The upper die 5 may be rectangular. The lower die 6 may be rectangular. The upper die 5 can abut against the second end surface 122 of the arc-shaped portion 12. The lower die 6 can be abutted against the bottom of the plate 2. And a second through hole 7 is formed in the lower die 6. And a convex circular ring 8 is arranged on the upper end surface of the lower die 6 along the outer edge of the second through hole 7. When the riveting is carried out, the convex circular ring 8 can extrude the outer edge of the first through hole 3 to enable the plate 2 to deform, so that the stud unit is tightly connected with the plate 2. If the lower die 6 is not provided with the convex circular ring 8, the force applied to the plate 2 by the die in the press riveting process is small, and the plate 2 cannot be deformed or the plate 2 cannot be deformed to be small, so that the stud unit and the plate 2 cannot be fastened and connected and are easy to fall off.

Specifically, in this embodiment, the second through hole 7 is in clearance fit with the body 11, so that the mold can be combined with the body 11 and is press-riveted thereto.

The principle and the implementation mode of the utility model are explained by applying specific embodiments in the utility model, and the description of the embodiments is only used for helping to understand the technical scheme and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (14)

1. The utility model provides a double-screw bolt unit, this double-screw bolt unit is used for being connected with panel, be equipped with first through-hole on the panel, its characterized in that includes:

the bolt comprises a body and an arc-shaped part formed on one side of the body, and the torsion piece is sleeved between the body and the arc-shaped part, and two ends of the torsion piece are fixedly connected with the body and the arc-shaped part respectively;

the outer diameters of the body and the torsion piece are smaller than the diameter of the first through hole, and the outer diameter of one end, away from the torsion piece, of the arc-shaped portion is larger than the diameter of the first through hole.

2. The stud unit of claim 1, wherein the sheet material is pure copper.

3. The stud unit of claim 1, wherein the stud is made of pure copper.

4. The stud unit of claim 1, wherein the torque member is of splined or hexagonal cross-section.

5. The stud unit of claim 4, wherein the serrations are straight or skewed teeth.

6. The stud unit of claim 1, wherein the torque member has an outer diameter less than or equal to an outer diameter of the body.

7. The stud unit of claim 1, wherein the arcuate portion includes first and second oppositely disposed end surfaces, first and second oppositely disposed arcuate surfaces connecting the first and second end surfaces, respectively.

8. The stud unit of claim 7, wherein the first end surface has a diameter that is less than a diameter of the second end surface, the first end surface having a diameter that is less than a diameter of the through hole.

9. The stud unit of claim 8, wherein the diameter of the second end face is 1.05-1.3 times the diameter of the through hole.

10. The utility model provides a connecting mechanism, this connecting mechanism includes double-screw bolt unit and panel, be equipped with first through-hole on the panel, a serial communication port, the double-screw bolt unit includes double-screw bolt and torsion piece, the double-screw bolt includes the body and forms the arc portion of body one side, the torsion piece sets up between body and the arc portion and its both ends respectively with the body with arc portion fixed connection, the arc portion with the torsion piece all through the pressure rivet with first through-hole is connected.

11. The connection mechanism of claim 10, wherein the sheet material is deformed to flow between the arcuate portion and the torsion member, into the torsion member gap, and between the torsion member and the body.

12. The connecting mechanism of claim 10, wherein the second end surface of the arcuate portion is flush with the end surface of the sheet material after the stud is riveted to the sheet material.

13. The die for press riveting the connecting mechanism according to any one of claims 10 to 12, wherein the die comprises an upper die and a lower die which is positioned below the upper die and is arranged opposite to the upper die, the upper die can be abutted to the second end face of the arc-shaped portion, the lower die can be abutted to the bottom of the plate, a second through hole is formed in the lower die, a convex circular ring is arranged on the outer edge of the second through hole and can extrude the outer edge of the first through hole so that the stud unit is tightly connected with the plate when the press riveting is performed.

14. The mold of claim 13, wherein the second through hole is a clearance fit with the body.

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