CN217107787U

CN217107787U - Sealed rivet nut and forming device for same

Info

Publication number: CN217107787U
Application number: CN202122897348.3U
Authority: CN
Inventors: 秦坤; 林勇德; 汪红兵; 段森月; 路凤
Original assignee: Penn Engineering Automotive Fasteners Kunshan Co ltd
Current assignee: Penn Engineering Automotive Fasteners Kunshan Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-08-02
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a sealed rivet nut and forming device who is used for sealed rivet nut, wherein sealed rivet nut includes: the nut body comprises a rod body and a flange part fixedly connected with the rod body, wherein a first groove which is sunken towards the inside of the rod body is formed in part of the rod body, and a second groove which is sunken towards the inside of the flange part is formed in one side, close to the rod body, of the flange part; and the sealing unit can be arranged in the first groove, and can be jacked into the second groove by a plate in the first groove and abutted against the plate in the rivet pulling process of the nut body. The utility model discloses can be applicable to the higher condition of moment of torsion requirement. Meanwhile, sealing can be achieved only by the region where the sealing unit is located, so that the contact area between the flange portion and the plate is reduced, and the sealing device is suitable for the condition of limited space.

Description

Sealed rivet nut and forming device for same

Technical Field

The utility model relates to a fastener field of making, specific is a sealed rivet nut and forming device who is used for sealed rivet nut.

Background

The rivet nut is a nut which is tightly connected with a connected piece in a rivet mode, and is widely used for assembling electromechanical and light industrial products such as automobiles, aviation, instruments, furniture, decorations and the like at present. The novel riveting tool is developed for overcoming the defects that a welding nut of a metal sheet and a thin pipe is easy to melt, an internal thread is easy to slip, and the like, does not need to tap the internal thread, does not need to weld the nut, is firm in riveting, is high in efficiency, and is convenient to use. In the prior art, in order to enable the rivet nut to have a sealing effect, a groove is formed in a flange portion of the rivet nut, and a sealant is coated inside the groove. However, in the actual use process, the sealant needs to achieve a better sealing effect, a larger contact surface is required between the area coated with the sealant and the plate, and the situation that the glue cracks easily occurs when the torque is higher is avoided, so that the sealant cannot be applied to the scene with limited space and higher torque.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the prior art, the embodiment of the utility model provides a sealed rivet nut and forming device who is used for sealed rivet nut, it is used for solving the above-mentioned unable problem that is applicable to the limited and higher scene of moment of torsion in space.

The embodiment of the application discloses: a sealing blind rivet nut, comprising: the nut body comprises a rod body and a flange part fixedly connected with the rod body, wherein a first groove which is sunken towards the inside of the rod body is formed in part of the rod body, and a second groove which is sunken towards the inside of the flange part is formed in one side, close to the rod body, of the flange part; and the sealing unit can be arranged in the first groove, and can be jacked into the second groove by a plate in the first groove and abutted against the plate in the rivet pulling process of the nut body.

Further, the sealing unit is an O-shaped sealing ring, and the sealing unit is partially arranged outside the first groove.

Furthermore, the rod body comprises a plurality of first grooves which are annularly arranged on the side wall of the rod body, and the adjacent first grooves are mutually isolated.

Furthermore, the first groove is annularly arranged on the side wall of the rod body, and the section of the first side wall, perpendicular to the extending direction of the rod body, is annular.

Further, the depth of the second groove is smaller than the width of the second groove, and the length of the sealing unit in any direction is between the depth and the width of the second groove.

Further, one end, far away from the rod body, of the second groove comprises a transition unit, and the transition unit extends from the second groove to the flange part in the direction far away from the rod body.

Further, the transition unit is linear.

The embodiment of the application also discloses a forming device for sealing rivet nut, including the cold heading machine, and install in mould subassembly on the cold heading machine, mould subassembly includes: the opening and closing mold core can be arranged on the outer side of the side wall of the rod body of the sealed rivet nut, the opening and closing mold core is close to the part of the side wall and is provided with a protruding part, and the protruding part can enable the rod body to form a first groove when the mold is closed.

The utility model has the advantages as follows:

1. the sealing unit can be filled in the second groove through elastic deformation of the sealing unit in the second groove, so that the sealing unit is abutted against the second groove and the plate, the friction force between the sealing unit and the second groove and between the sealing unit and the plate is large, and finally the sealing unit plays a role in sealing the second groove and the plate. After the sealing unit is filled in the second groove, the friction coefficient between the sealing unit and the second groove and between the sealing unit and the plate is gradually increased due to the existence of extrusion force, so that the friction force is increased, and the sealing unit can be suitable for the condition with higher torque requirement. Meanwhile, sealing can be achieved only by the region where the sealing unit is located, so that the contact area between the flange portion and the plate is reduced, and the sealing device is suitable for the condition of limited space.

2. Although the first groove has the function of fixing the sealing unit, if the first groove is in contact with the second groove, if the first groove is arranged in the second groove, the sealing unit can be jacked into the first groove in the rivet pulling process, so that the contact area between the sealing unit and the second groove and between the sealing unit and the plate is reduced, the first groove is arranged on the rod body, namely, a certain preset distance is reserved between the first groove and the second groove, the filling effect can be better, and the sealing effect is further improved.

3. The sealing unit part is arranged outside the first groove, so that the sealing unit outside the first groove can be pushed by the plate in the riveting process, and the contact surface of the sealing unit and the plate is larger in the process of moving from the first groove to the second groove.

4. The transition unit can make the elastic unit gradually attach to the plate when deforming, so that the attaching effect between the plate and the flange part is increased, and the sealing performance between the plate and the sealing rivet nut is better.

In order to make the aforementioned and other objects, features and advantages of the invention 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 these drawings without creative efforts.

Fig. 1 is a schematic structural view of a sealing blind rivet nut in a first working state according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the sealing blind rivet nut in the second working state according to the embodiment of the present invention;

fig. 3 is a top view of a sealing blind rivet nut in an embodiment of the invention;

fig. 4 is a detail view of a sealing blind rivet nut in an embodiment of the invention;

fig. 5 is a schematic structural view of a forming device for sealing a blind rivet nut according to an embodiment of the present invention;

fig. 6 is a detail view of a forming device for sealing a blind rivet nut according to an embodiment of the present invention.

Reference numerals of the above figures: 1. a nut body; 11. a rod body; 111. a first groove; 112. a side wall; 12. a flange portion; 121. a second groove; 122. a transition unit; 3. a sealing unit; 4. a plate material; 5. opening and closing the mold core; 51. a projection.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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 by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the sealing blind rivet nut of the present embodiment includes:

the nut body 1, the nut body 1 can include the body of rod 11 and with body of rod 11 fixed connection's flange portion 12. In this embodiment, the flange portion 12 is located at one end of the rod body 11. Of course, in other alternative embodiments, the relative positions of the nut body 1 and the flange portion 12 may be adjusted according to actual needs. A part of the rod body 11 may be provided with a first groove 111 recessed into the rod body 11, and the first groove 111 is used for fixing the sealing unit 3 before the rivet pulling step is performed, so as to prevent the sealing unit 3 from moving relative to the nut body 1 before the rivet pulling step is performed. The flange portion 12 has a second groove 121 recessed inward of the flange portion 12 on a side thereof adjacent to the rod body 11, and the second groove 121 is configured to receive the sealing unit 3 ejected from the first groove 111 by the sheet material 4 when the blind riveting process is performed, so that the sealing unit 3 can be transferred to the second groove 121.

A sealing unit 3, wherein the sealing unit 3 can be placed in the first groove 111, so that the sealing unit 3 can be fixed by the first groove 111, thereby preventing the relative movement between the sealing unit 3 and the nut body 1 before the riveting step. The sealing unit 3 can be pushed from the first groove 111 into the second groove 121 by the plate 4 during the rivet pulling process of the nut body 1 and can be abutted against the second groove 121 and the plate 4.

In this embodiment, the sealing unit 3 is a sealing rubber ring, and the nut body 1 is gradually changed from a first working state to a second working state in the riveting process.

In the first working state, the nut body 1 is not subjected to rivet pulling or the plate 4 is not abutted against the sealing unit 3 in the rivet pulling process, and in this state, the sealing unit 3 is arranged in the first groove 111. When the rivet-pulling process is gradually carried out until the plate 4 abuts against the sealing unit 3, the plate 4 is gradually close to the sealing unit 3, the sealing unit 3 is finally jacked into the second groove 121, the second groove 121 is filled with the sealing unit 3 according to the shape of the second groove 121 due to the flowability of the material of the sealing unit 3, and then the bottom walls of the sealing unit 3 and the second groove 121 and the plate 4 are abutted, so that a second working state is achieved.

By means of the structure, the sealing unit 3 can be filled in the second groove 121 through the elastic deformation of the sealing unit 3 in the second groove 121, so that the sealing unit 3 is abutted against the second groove 121 and the plate 4, the friction force between the sealing unit 3 and the second groove 121 as well as between the sealing unit 3 and the plate 4 is large, and finally the sealing unit 3 has a sealing effect on the second groove 121 and the plate 4. After the sealing unit 3 fills the second groove 121, the friction coefficient between the sealing unit and the second groove 121 and the plate 4 is gradually increased due to the existence of the extrusion force, so that the friction force is increased, and the sealing unit can be applied to the situation with high torque requirement. At the same time, sealing is achieved only in the region of the sealing unit 3, so that the contact area between the flange portion 12 and the sheet 4 is reduced, thereby being suitable for a case where space is limited.

In addition, although the first groove 111 has an effect of fixing the sealing unit 3, if the first groove 111 contacts with the second groove 121, if the first groove 111 is disposed in the second groove 121, the sealing unit 3 is pushed into the first groove 111 during the rivet pulling process, so as to reduce the contact area between the sealing unit 3 and the second groove 121 and between the plate 4 and the second groove 121, and the first groove 111 is disposed on the rod body 11, so that a certain preset distance is formed between the first groove 111 and the second groove 121, which can improve the filling effect, and further increase the sealing effect.

Specifically, the sealing unit 3 is an O-ring, so that the sealing unit 3 can be annularly arranged on the outer side of the rod body 11. In the present embodiment, the cross-sectional outer contour of the rod body 11 along the direction perpendicular to the extending direction thereof is circular. Of course, in other alternative embodiments, the shape of the sidewall 112 of the rod 11 can be adjusted according to actual needs. The sealing unit 3 is partially disposed outside the first groove 111, so that the sealing unit 3 outside the first groove 111 can be pushed by the sheet material 4 during the riveting process, and thus the contact surface between the sealing unit 3 and the sheet material 4 is large during the movement from the first groove 111 to the second groove 121.

Specifically, as shown in fig. 3, the rod body includes a plurality of first grooves 111, the plurality of first grooves 111 are annularly disposed on a sidewall 112 of the rod body 11, and adjacent first grooves 111 are isolated from each other. In this embodiment, three first grooves 111 are annularly disposed on the sidewall 112 of the rod 11, but of course, in other alternative embodiments, the number of the first grooves 111 may be adjusted according to actual needs. The arrangement of the plurality of first grooves 111 can make the first grooves 111 easier to be formed by cold heading, so that the first grooves 111 can be prepared more conveniently.

Specifically, the first groove 111 may be annularly disposed on a sidewall 112 of the rod 11, and a cross section of the first sidewall 112 perpendicular to the extending direction of the rod 11 is annular, that is, in this embodiment, the first groove 111 is an annular groove disposed on the sidewall 112. In the present embodiment, the outer contour of the cross section of the rod 11 along the direction perpendicular to the extending direction is circular, and the first sidewall 112 is circular. Of course, in other alternative embodiments, the first sidewall 112 can be adapted according to the outer contour of the rod 11.

Specifically, the depth of the second groove 121 may be smaller than the width thereof, and the length of the sealing unit 3 in any direction is between the depth and the width of the second groove 121. After the sealing unit 3 enters the second groove 121, the length of the sealing unit 3 in any direction is smaller than the depth of the second groove 121, so that under the extrusion force of the plate 4, the sealing unit 3 can elastically deform, the sealing unit 3 can deform and extend along the depth direction of the second groove 121, finally the sealing unit 3 fills the second groove 121, and after the riveting is finished, the sealing unit 3 is arranged between the second groove 121 and the plate 4, so that the sealing effect between the plate 4 and the sealing rivet nut is realized.

Specifically, as shown in fig. 4, an end of the second groove 121 away from the rod 11 may include a transition unit 122, and the transition unit 122 extends from the second groove 121 to the flange portion 12 in a direction away from the rod 11. The transition unit 122 can enable the elastic unit to be gradually attached to the plate 4 when the elastic unit deforms, so that the attaching effect between the plate 4 and the flange part 12 is improved, and the sealing performance between the plate 4 and the sealing rivet nut is better.

Specifically, the transition unit 122 may be a linear type. The linear transition unit 122 can ensure that the transition unit 122 is more easily obtained while ensuring the fitting effect between the plate 4 and the flange part 12, so that the service life of a mold for preparing the transition unit 122 can be prolonged in the actual use process.

As shown in fig. 5 to 6, the present application further provides a forming device for a sealed blind rivet nut, including a cold header, and a die assembly mounted on the cold header, wherein the die assembly includes:

the mold comprises an opening and closing mold core 5, wherein the opening and closing mold core 5 can be arranged on the outer side of a side wall 112 of a rod body 11 of the sealed rivet nut, a protruding part 51 is arranged on a part, close to the side wall 112, of the opening and closing mold core 5, and the protruding part 51 can enable the rod body 11 to form a first groove 111 when the mold is closed.

In this embodiment, the blind rivet sealing nut extends along a first direction, and the outer profile of the blind rivet sealing nut in a cross section perpendicular to the first direction is circular. The number of the opening and closing mold cores 5 is three, and the opening and closing mold cores are annularly arranged outside the side wall 112 of the rod body 11 of the sealed rivet nut. During the mold closing process of the opening and closing mold core 5, the convex part 51 gradually acts on the side wall 112 of the rod body 11, and finally the first groove 111 is formed.

Borrow by above-mentioned structure, realized carrying out grooved effect on the body of rod 11 of sealed rivet nut to make the sealed rivet nut who makes by this forming device be formed with first recess 111, first recess 111 can hold sealed unit 3, and then make the sealed rivet nut who makes this forming device just can satisfy the higher condition of moment of torsion requirement under sealed prerequisite.

The utility model discloses well sealed rivet nut's preparation method, including following step:

a second groove 121 is formed at one end of the flange part 12 of the sealing rivet nut, which is close to the rod body 11.

A first groove 111 is formed on the rod body 11 using a cold heading forming process, and a predetermined distance is provided between the first groove 111 and the second groove 121. In this embodiment, the sealing unit 3 is disposed in the first groove 111, and the sealing unit 3 can be pushed into the second groove 121 by the plate 4 from the first groove 111 and abut against the second groove 121 and the plate 4 in the process of riveting the rod body 11 on the sealing rivet nut.

By means of the method, the strength of the product is greatly enhanced by using the cold heading forming process, so that the first groove 111 formed in the rod body 11 has higher strength, the phenomenon that the sealing unit 3 falls off after being assembled can be effectively prevented, and the sealing rivet nut can be ensured to meet the requirement of torque resistance under the condition that the head diameter of the flange part 12 is limited.

Specifically, after the step of forming the first groove 111 on the rod body 11 by using a cold heading forming process, and the first groove 111 and the second groove 121 have a predetermined distance therebetween, the method includes the following steps:

an O-shaped sealing ring corresponding to the size of the first groove 111 is arranged in the first groove, and the O-shaped sealing ring can be arranged on the rod body 11 in a surrounding mode, so that the sealing effect of the sealing rivet nut is enhanced.

And (4) rivet-pulling the sealing rivet nut and the plate 4, wherein the plate 4 pushes the O-shaped sealing ring to completely enter the second groove 121. Therefore, when the O-shaped sealing ring is arranged in the second groove 121, the extrusion force of the plate 4 to the O-shaped sealing ring generates elastic deformation, and the sealing effect between the sealing rivet nut and the plate 4 is further realized.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A sealed blind rivet nut, comprising:

the nut body comprises a rod body and a flange part fixedly connected with the rod body, wherein a first groove which is sunken towards the inside of the rod body is formed in part of the rod body, and a second groove which is sunken towards the inside of the flange part is formed in one side, close to the rod body, of the flange part;

and the sealing unit can be arranged in the first groove, and can be jacked into the second groove by a plate in the first groove and abutted against the plate in the rivet pulling process of the nut body.

2. The sealing blind rivet nut of claim 1, wherein the sealing unit is an O-ring, and a portion of the sealing unit is disposed outside the first groove.

3. The sealing blind rivet nut of claim 1, including a plurality of the first grooves, the plurality of first grooves being annularly disposed on the sidewall of the shank, adjacent first grooves being isolated from each other.

4. The blind rivet nut of claim 1, wherein the first groove is disposed around a sidewall of the shank, the first sidewall having an annular cross-section perpendicular to a direction of extension of the shank.

5. The sealing blind rivet nut of claim 1, wherein the depth of the second groove is less than its width, and the length of the sealing unit in either direction is between the depth and width of the second groove.

6. The sealing blind rivet nut of claim 1, wherein an end of the second groove remote from the shank includes a transition element extending from the second groove in a direction away from the shank toward the flange portion.

7. The sealing blind rivet nut of claim 6, wherein the transition unit is rectilinear.

8. The utility model provides a forming device for sealed rivet nut, includes the cold heading machine, and install in mould subassembly on the cold heading machine, its characterized in that, mould subassembly includes:

the opening and closing mold core can be arranged on the outer side of the side wall of the rod body of the sealed rivet nut, the opening and closing mold core is close to the part of the side wall and is provided with a protruding part, and the protruding part can enable the rod body to form a first groove when the mold is closed.