CN115805284A

CN115805284A - Rivet pulling device, self-plugging rivet and self-plugging rivet installation combination

Info

Publication number: CN115805284A
Application number: CN202210545477.2A
Authority: CN
Inventors: 黄圣国; 贾峰; 梅敏; 林志强
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2023-03-17

Abstract

The application relates to a rivet device, self-plugging rivet and self-plugging rivet installation combination, rivet device includes: a main body; the clamping head is arranged at one end of the main body and is provided with a clamping cavity for clamping the blind rivet; a flexible structure covering at least a portion of the wall of the clamping cavity; wherein the strength of the flexible structure is less than the strength of the gripping head. Because the chamber wall in centre gripping chamber covers there is the flexible construction that changes and take place deformation, consequently insert the interior blind rivet of centre gripping chamber and pass through the chamber wall contact of flexible construction and centre gripping chamber to turning into the sliding friction between the chamber wall in centre gripping chamber and the blind rivet between flexible construction and the blind rivet, the static friction between the chamber wall in flexible construction and centre gripping chamber ensures can not lead to both to take place wearing and tearing and produce the piece because of the sliding friction between holding head and the blind rivet, finally avoids the battery to lead to functional failure because of the piece.

Description

Rivet pulling device, self-plugging rivet and self-plugging rivet installation combination

Technical Field

The application relates to the technical field of batteries, in particular to a rivet pulling device, a self-plugging rivet and a self-plugging rivet installation combination.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

The self-plugging rivet is pulled by a special riveter to enable a rivet body to expand to achieve a riveting effect, and is particularly suitable for riveting occasions where common rivets (needing riveting from two sides) are inconvenient to use, so that the self-plugging rivet is widely used for connecting various components in a power battery, and convenience is brought to the assembly of the power battery. However, the conventional blind rivet is easy to generate fragments in the installation process, and the fragments falling into the battery pack affect the normal operation of the power battery.

Disclosure of Invention

In view of the above problems, the present application provides a rivet pulling device, a blind rivet and a blind rivet installation combination, which can avoid the problem that the blind rivet generates fragments in the installation process.

In a first aspect, the present application provides a rivet apparatus, comprising:

a main body;

the clamping head is arranged at one end of the main body and is provided with a clamping cavity for clamping the blind rivet; and

a flexible structure covering at least part of the cavity wall of the clamping cavity;

wherein the strength of the flexible structure is less than the strength of the gripping head.

In the technical scheme of this application embodiment, because the chamber wall in centre gripping chamber covers there is the flexible construction that changes and take place deformation, consequently, insert the interior blind rivet of centre gripping chamber and pass through the flexible construction and the chamber wall contact in centre gripping chamber, thereby turn into the sliding friction between the chamber wall in centre gripping chamber and the blind rivet between flexible construction and the blind rivet, the static friction between the chamber wall in flexible construction and centre gripping chamber, ensure that can not lead to both to take place wearing and tearing and produce the piece because of sliding friction between holding head and the blind rivet, finally avoid the battery to lead to functional failure because of the piece.

In one embodiment, the clamping head comprises a plurality of clamping jaws, all of which together enclose the clamping cavity. So, the centre gripping head is formed by a plurality of clamping jaws, and a plurality of clamping jaws are gathered together each other and can be conveniently centre gripping self-plugging rivet, and a plurality of clamping jaws keep away from each other and can release self-plugging rivet.

In one embodiment, the flexible structure is sleeved in the clamping cavity, and the flexible structure encloses to form a clamping space for clamping the blind rivet. Therefore, the flexible structure can be installed only by sleeving the flexible structure in the clamping cavity, and the self-plugging rivet can be inserted into the clamping space formed by the flexible structure along the axial direction. The flexible structure can be applied to the existing rivet pulling device without performing additional adaptive improvement on the structure of the rivet pulling device, so that the flexible structure has a wide application range.

In one embodiment, the flexible structure is an interference fit with the gripping head. So, rely on interference fit between them can avoid the flexible construction to drop from the clamping head, improve the convenience of use of rivet device, and need not additionally to use other fasteners to be fixed in the clamping head with the flexible construction.

In a second aspect, the present application provides a blind rivet comprising:

a core bar;

the nail sleeve is sleeved at one axial end of the core rod; and

the flexible structure at least partially covers the outer circular surface of the other axial end of the core rod;

wherein the strength of the flexible structure is less than the strength of the core rod.

In the technical scheme of this application embodiment, because the outer disc cover of core bar has the flexible construction that changes and take place deformation, consequently self-plugging rivet passes through the flexible construction and contacts with rivet pulling device, thereby with rivet pulling device and self-plugging rivet between the sliding friction turn into between flexible construction and the self-plugging rivet, the static friction between flexible construction and the rivet pulling device, ensure to rivet pulling device and self-plugging rivet between can not lead to both to take place wearing and tearing and produce the piece because of sliding friction, finally avoid the battery to lead to functional failure because of the piece.

In one embodiment, the flexible structure is sleeved at the other axial end of the core rod, and the flexible structure circumferentially surrounds the core rod. Therefore, the flexible structure can be installed only by sleeving the flexible structure on the core rod, and can be applied to the existing self-plugging rivet without performing additional adaptive improvement on the structure of the self-plugging rivet, so that the self-plugging rivet has a wide application range.

In one embodiment, the flexible structure is an interference fit with the stem. Therefore, the flexible structure can be prevented from falling off from the core rod by means of interference fit of the two, the use convenience of the self-plugging rivet is improved, and the flexible structure is fixed on the core rod without additionally using other fasteners.

In a third aspect, the present application provides a blind rivet setting assembly, comprising:

the self-plugging rivet comprises a core bar and a rivet sleeve sleeved at one axial end of the core bar;

the rivet pulling device comprises a main body and a clamping head arranged at one end of the main body, wherein the clamping head is provided with a clamping cavity for clamping the other axial end of the core rod; and

the flexible structure is positioned between the core rod and the cavity wall of the clamping cavity;

wherein the strength of the flexible structure is less than the strength of the mandrel and the strength of the gripping head.

In the technical scheme of this application embodiment, because be equipped with between the outer disc of core bar and the chamber wall in centre gripping chamber and change the flexible construction that takes place deformation, consequently, insert the core bar in the centre gripping intracavity and pass through the chamber wall contact in flexible construction and centre gripping chamber, thereby with the sliding friction between the chamber wall in centre gripping chamber and the core bar turn into between flexible construction and the core bar, the static friction between the chamber wall in flexible construction and centre gripping chamber, guarantee between holding head and the core bar can not lead to both to take place wearing and tearing and produce the piece because of sliding friction, finally avoid the battery to lead to functional failure because of the piece.

In one embodiment, the flexible structure covers at least a portion of the walls of the clamping cavity. Because the chamber wall in centre gripping chamber covers there is the flexible construction that changes and take place deformation, consequently insert the core bar in the centre gripping intracavity and pass through the wall contact in flexible construction and centre gripping chamber to with the sliding friction between the chamber wall in centre gripping chamber and the core bar turn into between flexible construction and the core bar, the static friction between the chamber wall in flexible construction and centre gripping chamber, guarantee can not lead to both to take place wearing and tearing and produce the piece because of sliding friction between centre gripping head and the core bar, finally avoid the battery to lead to functional failure because of the piece.

In one embodiment, the flexible structure is sleeved in the clamping cavity to enclose a clamping space for clamping the blind rivet, and the flexible structure is in interference fit with the clamping head.

So, only need locate the centre gripping intracavity with the flexible construction through the interference fit cover and can accomplish the installation of flexible construction, this flexible construction can be applied to in the device is riveted to current drawing, and need not to carry out extra adaptability to the structure of riveting the device and improve, also need not additionally to use other fasteners to be fixed in the holding head with the flexible construction to extensive application scope has.

In one embodiment, the flexible structure at least partially covers the outer circumferential surface of the other axial end of the core rod.

Because the outer circular surface of the core rod is covered with the flexible structure which is easier to deform, the self-plugging rivet is in contact with the cavity wall of the clamping cavity through the flexible structure, so that the sliding friction between the cavity wall of the clamping cavity and the self-plugging rivet is converted into the static friction between the flexible structure and the self-plugging rivet and between the flexible structure and the cavity wall of the clamping cavity, the situation that the wear of the cavity wall of the clamping cavity and the self-plugging rivet is caused by the sliding friction to generate fragments is ensured, and finally, the situation that the functional failure of the battery is caused by the fragments is avoided.

In one embodiment, the flexible structure is sleeved outside the core rod to circumferentially surround the core rod, and the flexible structure is in interference fit with the core rod.

Therefore, the flexible structure can be installed only by sleeving the flexible structure on the core rod, and can be applied to the existing blind rivet without performing additional adaptive improvement on the structure of the blind rivet and additionally fixing the flexible structure on the core rod by using other fasteners, so that the blind rivet has a wide application range.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

FIG. 3 is a schematic view of a gripping head according to some embodiments of the present application;

FIG. 4 isbase:Sub>A cross-sectional view A-A of the gripping head of FIG. 3 according to some embodiments of the present application;

FIG. 5 isbase:Sub>A cross-sectional view taken along line A-A of the gripping head of FIG. 3 according to some embodiments of the present application;

FIG. 6 is a schematic structural view of a blind rivet according to some embodiments of the present application;

the reference numbers in the detailed description are as follows:

10000. a vehicle; 1000. a battery; 2000. a controller; 3000. a motor;

100. a box body; 110. a first portion; 120. a second portion; 200. a battery cell;

300. a clamping head; 310. a clamping jaw; 320. a clamping cavity;

400. self-plugging rivets; 410. a core bar; 411. a nail sleeve main body; 420. nailing a sleeve; 421. a nail sleeve main body; 422. a nail sleeve limiting part;

500. a flexible structure; 510. and (4) clamping the space.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The self-plugging rivet is used as a fastener which can rivet from the single side of a part to be fixed, and is widely applied to power batteries for fixedly connecting two or more parts to be fixed. Specifically, the blind rivet comprises a core rod and a rivet sleeve, wherein the rivet sleeve is arranged at one end of the core rod. When the piece to be fixed is fixed, the nail sleeve is firstly arranged on the piece to be fixed in a penetrating mode, then the rivet pulling device is used for exerting axial tension on the core rod, the nail sleeve overcomes the yield limit of the material of the nail sleeve to deform and expand under the action of the core rod, then the core rod overcomes the tensile limit of the core rod to break and is drawn out of the nail sleeve, and the piece to be fixed is fixedly connected with each other through the deformed and expanded nail sleeve.

The inventor has noted that during the installation of blind rivets, debris is generated, and the falling of the debris inside the power battery easily causes the insulation failure inside the power battery, thereby causing the functional failure of the power battery. The inventor finds that the scrap is from the fact that the pulling rivet device is clamped on the side wall of the core rod, and during the process that the pulling rivet device applies axial pulling force to the core rod, friction force is generated between the pulling rivet device and the side wall of the core rod to drive the core rod to move. However, when the axial tension required for the core rod is large, the pulling rivet device and the core rod can slide relatively to each other to a certain extent, so that the core rod is scratched to generate chips.

Based on the above problems, in order to solve the problem that the functional failure of the power battery is caused by the fragments generated by the self-plugging rivet in the installation process, the inventor designs the self-plugging rivet through deep research, and the sliding friction between the self-plugging rivet and the rivet pulling device can be effectively eliminated by arranging the flexible structure between the contact surfaces of the self-plugging rivet and the rivet pulling device, so that the self-plugging rivet is prevented from generating the fragments in the installation process, and finally the problem that the functional failure of the power battery is caused by the fragments is avoided.

The blind rivet is installed in an electric device using a battery as a power supply, and the electric device can be but is not limited to a mobile phone, a flat panel, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments are described by taking an electric device as an example of a vehicle according to an embodiment of the present application.

Referring to fig. 1, a vehicle 10000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile. The inside of the vehicle 10000 is provided with a battery 1000, and the battery 1000 may be provided at the bottom or the head or the tail of the vehicle 10000. The battery 1000 may be used for power supply of the vehicle 10000, for example, the battery 1000 may serve as an operation power source of the vehicle 10000. The vehicle 10000 can further include a controller 2000 and a motor 3000, wherein the controller 2000 is used for controlling the battery 1000 to supply power to the motor 3000, for example, for starting, navigation and operation power demand of the vehicle 10000.

In some embodiments of the present application, the battery 1000 may be used as an operating power source of the vehicle 10000, and may also be used as a driving power source of the vehicle 10000 to provide driving power for the vehicle 10000 instead of or partially instead of fuel or natural gas.

Referring to fig. 2, fig. 2 is an exploded view of a battery 1000 according to some embodiments of the present disclosure. The battery 1000 includes a case 100 and a battery cell 200, and the battery cell 200 is accommodated in the case 100. The case 100 is used to provide a receiving space for the battery cells 200, and the case 100 may have various structures. In some embodiments, the case 100 may include a first portion 110 and a second portion 120, the first portion 110 and the second portion 120 cover each other, and the first portion 110 and the second portion 120 together define a receiving space for receiving the battery cell 200. The second part 120 may be a hollow structure with an open end, the first part 110 may be a plate-shaped structure, and the first part 110 covers the open side of the second part 120, so that the first part 110 and the second part 120 define an accommodating space together; the first portion 110 and the second portion 120 may be both hollow structures with one side open, and the open side of the first portion 110 is covered on the open side of the second portion 120. Of course, the box 100 formed by the first portion 110 and the second portion 120 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 1000, there may be a plurality of battery cells 200, and a plurality of battery cells 200 may be connected in series, in parallel, or in series-parallel, where in series-parallel refers to that a plurality of battery cells 200 are connected in series and in parallel. The plurality of battery cells 200 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery cells 200 is accommodated in the box body 100; of course, the battery 1000 may also be formed by connecting a plurality of battery cells 200 in series, in parallel, or in series-parallel to form a battery 1000 module, and then connecting a plurality of battery 1000 modules in series, in parallel, or in series-parallel to form a whole, and accommodating the whole in the box 100. The battery 1000 may further include other structures, for example, the battery 1000 may further include a bus member for achieving electrical connection between the plurality of battery cells 200.

Wherein, each battery cell 200 may be a secondary battery 1000 or a primary battery 1000; but is not limited to, the lithium sulfur battery 1000, the sodium ion battery 1000, or the magnesium ion battery 1000. The battery cell 200 may be cylindrical, flat, rectangular parallelepiped, or other shape.

The battery cell 200 refers to the smallest unit constituting the battery 1000. The battery cell 200 includes end caps, a housing, an electrical core assembly, and other functional components.

The end cap refers to a member that covers an opening of the case to insulate the internal environment of the battery cell 200 from the external environment. Without limitation, the shape of the end cap may be adapted to the shape of the housing to fit the housing. Alternatively, the end cap may be made of a material (e.g., an aluminum alloy) having certain hardness and strength, so that the end cap is not easily deformed when being extruded and collided, and thus the single battery 200 may have higher structural strength and improved safety performance. The end cap may be provided with functional components such as electrode terminals. The electrode terminals may be used to be electrically connected with the electric core assembly for outputting or inputting electric power of the battery cell 200. In some embodiments, a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 200 reaches a threshold value may be further disposed on the end cap. The end cap may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment. In some embodiments, insulation may also be provided on the inside of the end cap, which may be used to isolate the electrical connections within the housing from the end cap to reduce the risk of shorting. Illustratively, the insulator may be plastic, rubber, or the like.

The housing is an assembly for mating with end caps to form an internal environment of the battery cell 200, wherein the formed internal environment may be used to house the cell assembly, electrolyte, and other components. The housing and the end cap may be separate components, and an opening may be formed in the housing, and the opening may be covered by the end cap to form the internal environment of the battery cell 200. The end cap and the housing may be integrated, and specifically, the end cap and the housing may form a common connecting surface before other components are inserted into the housing, and when the interior of the housing needs to be sealed, the end cap covers the housing. The housing may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing may be determined according to the specific shape and size of the electric core assembly. The material of the housing may be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this application.

The cell assembly is a component in which electrochemical reactions occur in the battery cell 200. One or more electrical core assemblies may be contained within the housing. The cell assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive plate and the negative plate with the active materials form the main body part of the electric core assembly, and the parts of the positive plate and the negative plate without the active materials form the tabs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 1000, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

Referring to fig. 3 and 4, according to some embodiments of the present application, a rivet pulling device is provided, which can be used to rivet different components of the battery 1000 that need to be fixed, in cooperation with the blind rivet 400. In one embodiment, for example, the rivet apparatus may be used to assemble the case 100 of the battery 1000.

The blind rivet apparatus includes a main body, a clamping head 300, and a flexible structure 500. The clamping head 300 is installed at one end of the main body, the clamping head 300 is provided with a clamping cavity 320 for clamping the blind rivet 400, the flexible structure 500 covers at least part of the cavity wall of the clamping cavity 320, and the strength of the flexible structure 500 is smaller than that of the clamping head 300.

The rivet device can be driven electrically, pneumatically or manually, depending on the driving method. In the following examples, the rivet device is electrically driven. The main body comprises a main shell body and an electric driving structure accommodated in the main shell body, and the main body can be held by a user and provides power for the clamping head 300 to drive the clamping head 300 to clamp the blind rivet 400 and contract towards the direction of the main body.

The clamping head 300 is mounted to one end of the main body, and is a member for generating a clamping force to clamp the blind rivet 400. The shape of the clamping cavity 320 matches the shape of the blind rivet 400, one end of the blind rivet 400 may extend into the clamping cavity 320 in the axial direction of the clamping cavity 320, and the cavity wall of the clamping cavity 320 may apply a clamping force to the blind rivet 400 to clamp the blind rivet 400.

The flexible structure 500 is formed of a non-conductive material having a strength less than that of the gripping head 300 and thus is more easily deformed by an external force than the gripping head 300. The flexible structure 500 may cover the entire wall of the clamping chamber 320 or only a portion of the wall of the clamping chamber 320. When the flexible structure 500 covers only a part of the cavity walls of the clamping cavity 320, the specific positions of the cavity walls of the clamping cavity 320 covered by the flexible structure may be set according to the shape of the cavity walls and the blind rivet 400, so that the cavity walls of the clamping cavity 320 do not directly contact with the blind rivet 400.

Because the cavity wall of the clamping cavity 320 is covered with the flexible structure 500 which is more prone to deformation, the blind rivet 400 inserted into the clamping cavity 320 is in contact with the cavity wall of the clamping cavity 320 through the flexible structure 500, so that sliding friction between the cavity wall of the clamping cavity 320 and the blind rivet 400 is converted into static friction between the flexible structure 500 and the blind rivet 400 and between the flexible structure 500 and the cavity wall of the clamping cavity 320, it is ensured that no debris is generated between the clamping head 300 and the blind rivet 400 due to abrasion caused by the sliding friction, and finally, functional failure of the battery 1000 due to the debris is avoided.

According to some embodiments of the present application, the gripping head 300 includes a plurality of gripping jaws 310, all of the gripping jaws 310 collectively enclosing a gripping cavity 320.

The clamping head 300 preferably comprises three clamping jaws 310, the length direction of each clamping jaw 310 extends along the axial direction of the clamping head 300, the cross section of each clamping jaw 310 perpendicular to the axial direction is approximately in a fan-shaped ring shape, each clamping jaw 310 comprises an inner wall, an outer wall and a first side wall and a second side wall, the first side wall and the second side wall are connected between the inner wall and the outer wall, the length of the outer wall is larger than that of the inner wall in the circumferential direction of the clamping cavity 320, the first side wall and the second side wall extend obliquely towards the direction away from each other in the direction from the inner wall to the outer wall, and the distance between the first side wall and the second side wall is gradually increased. When all the clamping jaws 310 are brought together to form the clamping chamber 320, the inner walls of the clamping jaws 310 form the chamber wall of the clamping chamber 320, and the outer walls of the clamping jaws 310 form the outer circular surface of the clamping head 300. It will be appreciated that the shape and number of jaws 310 is not so limited and may be provided as desired.

Thus, the clamping head 300 is formed by a plurality of clamping jaws 310, the plurality of clamping jaws 310 are gathered together under the driving of the main body to conveniently clamp the blind rivet 400, and the plurality of clamping jaws 310 are far away from each other under the driving of the main body to release the blind rivet 400.

As shown in fig. 5, according to some embodiments of the present application, the flexible structure 500 is sleeved in the clamping cavity 320, and the flexible structure 500 encloses to form a clamping space for clamping the blind rivet 400.

The flexible structure 500 is a hollow cylindrical structure, the cross section of the flexible structure 500 perpendicular to the axial direction is in a circular ring shape, the outer contour of the flexible structure 500 is matched with the shape of the clamping cavity 320, the clamping space axially penetrates through the flexible structure 500, and the shape of the clamping space is matched with the shape of the blind rivet 400, so that the blind rivet 400 can be axially inserted into the clamping space.

Specifically, in some embodiments, the inner diameter of the flexible structure 500 is equal everywhere and the outer diameter of the flexible structure 500 is also equal everywhere in the axial direction. In other embodiments, the inner diameter of the flexible structure 500 may not be equal at different positions in the axial direction, and the outer diameter may not be equal at different positions in the axial direction, so as to match different shapes of the gripping lumens 320.

Referring again to fig. 4, in some other embodiments, there are multiple flexible structures 500, each flexible structure 500 is a planar structure attached to the inner wall of one of the jaws 310, and the specific shape of the flexible structure 500 matches the shape of the inner wall of the jaw 310, so as to cover the inner wall of the jaw 310 completely.

Thus, the flexible structure 500 can be mounted only by sleeving the flexible structure 500 in the clamping cavity 320, and the blind rivet 400 can be axially inserted into the clamping space formed by the flexible structure 500. The flexible structure 500 can be applied to an existing rivet apparatus without additional adaptive modification of the structure of the rivet apparatus, thereby having a wide application range.

According to some embodiments of the present application, the flexible structure 500 is an interference fit with the gripping head 300.

The interference fit is that elastic pressure is generated between the surfaces of the parts after assembly by means of the interference value of the shaft and the hole, so that tight connection is obtained. The outer diameter of the flexible structure 500 is slightly larger than the inner diameter of the clamping cavity 320, so that the flexible structure 500 generates elastic pressure under the action of the clamping head 300, thereby tightly connecting the two.

Thus, the flexible structure 500 can be prevented from falling off from the clamping head 300 by means of interference fit between the clamping head and the flexible structure, the use convenience of the rivet pulling device is improved, and other fasteners are not required to be additionally used for fixing the flexible structure 500 in the clamping head 300. It is understood that in other embodiments, the flexible structure 500 may be fixed relative to the gripping head 300 in other manners, which will not be described herein.

According to some embodiments of the present application, the present application provides a rivet pulling device, the rivet pulling device includes a main body and a clamping head 300 installed at one end of the main body, the clamping head 300 includes a plurality of clamping jaws 310, and the plurality of clamping jaws 310 jointly enclose and form a clamping cavity 320 for clamping a blind rivet 400. The rivet pulling device further comprises a cylindrical flexible structure 500, the flexible structure 500 is sleeved in the clamping cavity 320 and in interference fit with the clamping head 300, the strength of the flexible structure 500 is smaller than that of the clamping head 300, sliding friction can be avoided between the clamping head 300 and the blind rivet 400, and accordingly chipping caused by friction damage of the cavity wall of the clamping head 300 and the contact surface of the blind rivet 400 is prevented.

Referring to FIG. 6, according to some embodiments of the present application, a blind rivet 400 is provided, including a mandrel 410, a sleeve 420, and a flexible structure 500. The pin sleeve 420 is sleeved on one axial end of the core rod 410, and the flexible structure 500 at least partially covers the outer circular surface of the other axial end of the core rod 410. Wherein the strength of the flexible structure 500 is less than the strength of the core rod 410.

The core rod 410 is a solid cylindrical structure with a circular cross-section. One end of the core pin 410 in the axial direction forms a stopper for abutting against the pin sleeve 420. In this particular embodiment, the core rod 410 is formed of a metallic material or a composite material, and has a high strength and a certain ductility. It is understood that the size and shape of the core pin 410 are not limited and may be set as desired.

The nail sleeve 420 has a hollow cylindrical structure, and the cross section thereof is circular. The nail sleeve 420 comprises a nail sleeve main body 421 and a nail sleeve limiting part 422, the nail sleeve main body 421 is a hollow cylindrical structure, and the inner diameter of the nail sleeve main body 421 is larger than the outer diameter of the core rod 410. The nail sleeve limiting part 422 is connected to one axial end of the nail sleeve main body 421, the outer diameter of the nail sleeve limiting part 422 is larger than that of the nail sleeve main body 421, and the outer diameter of the nail sleeve limiting part 422 is gradually reduced from one end of the nail sleeve main body 421 to the other end thereof. When the pin sleeve 420 is assembled on the core rod 410, the pin sleeve 420 is sleeved on one axial end of the core rod 410, the central axis of the pin sleeve 420 is overlapped with the central axis of the core rod 410, and the pin sleeve limiting part 422 is located at one end of the pin sleeve main body 421, which is far away from the limiting part of the core rod 410. The tack sleeve 420 is also formed of a metallic material or a composite material, and has high strength and a certain ductility.

When the nail sleeve 420 is inserted into the fixed member, the nail sleeve position-limiting portion 422 is pressed against a side surface of the fixed member toward a side end surface of the nail sleeve main body 421. One end of the core rod 410, which is far away from the nail sleeve 420, is subjected to axial tension, which is far away from the nail sleeve 420, the nail sleeve main body 421 deforms and expands due to the pressure applied by the core rod 410, and the nail sleeve main body 421 expands and then clamps the fixed piece together with the nail sleeve limiting part 422.

The flexible structure 500 is formed of a non-conductive material having a strength less than that of the blind rivet 400, and thus is more easily deformed than the blind rivet 400 by an external force. The compliant structure 500 may cover only a partial area of the outer circumferential surface of the core pin 410 axially remote from one end of the tack bush 420 or may cover the entire area of the outer circumferential surface of the core pin 410 axially remote from one end of the tack bush 420. When the flexible structure 500 covers only a partial area of the outer circumferential surface of the core pin 410 axially away from one end of the tack bush 420, the position of the covered area thereof may be set as desired.

Because the outer circular surface of the core rod 410 is covered with the flexible structure 500 which is easier to deform, the blind rivet 400 is in contact with the rivet pulling device through the flexible structure 500, so that the sliding friction between the rivet pulling device and the blind rivet 400 is converted into the static friction between the flexible structure 500 and the blind rivet 400 and between the flexible structure 500 and the rivet pulling device, the situation that the rivet pulling device and the blind rivet 400 are abraded due to the sliding friction to generate fragments is avoided, and finally the functional failure of the battery 1000 due to the fragments is avoided.

According to some embodiments of the present application, the flexible structure 500 is sleeved on the other axial end of the core rod 410, and the flexible structure 500 circumferentially surrounds the core rod 410.

The flexible structure 500 is a hollow cylindrical structure, the cross section of the flexible structure 500 perpendicular to the axial direction is circular, and the inner contour of the flexible structure 500 is matched with the shape of the outer circular surface of the core rod 410, so as to circumferentially surround the core rod 410. Specifically, in some embodiments, the inner diameter of the flexible structure 500 is equal everywhere and the outer diameter of the flexible structure 500 is also equal everywhere in the axial direction. In other embodiments, the inner diameter of the flexible structure 500 may not be equal at different positions in the axial direction, and the outer diameter may not be equal at different positions in the axial direction, thereby meeting the requirements of blind rivets 400 of different shapes.

Thus, the flexible structure 500 can be mounted only by sleeving the flexible structure 500 on the core rod 410, and the flexible structure 500 can be applied to the existing blind rivet 400 without performing additional adaptive improvement on the structure of the blind rivet 400, thereby having a wide application range.

According to some embodiments of the present application, the flexible structure 500 is an interference fit with the core pin 410.

The interference fit is that elastic pressure is generated between the surfaces of the parts after assembly by means of the interference value of the shaft and the hole, so that tight connection is obtained. The inner diameter of the flexible structure 500 is slightly smaller than the outer diameter of the stem 410 of the blind rivet 400, so that the flexible structure 500 generates elastic pressure under the action of the stem 410, thereby tightly connecting the two.

Thus, the flexible structure 500 can be prevented from falling off from the core rod 410 by means of interference fit between the two, the use convenience of the blind rivet 400 is improved, and other fasteners are not required to be additionally used for fixing the flexible structure 500 on the core rod 410.

According to some embodiments of the present application, the present application provides a blind rivet 400, the blind rivet 400 includes a core rod 410 and a nail sleeve 420 sleeved on one axial end of the core rod 410, one end of the core rod 410, which is axially far away from the nail sleeve 420, is sleeved with a cylindrical flexible structure 500, the flexible structure 500 circumferentially surrounds the core rod 410, the strength of the flexible structure 500 is smaller than that of the blind rivet 400, thereby avoiding sliding friction between the blind rivet 400 and a rivet pulling device, and further preventing the contact surface of the blind rivet 400 or the rivet pulling device from generating fragments due to friction damage.

Referring to fig. 5 and 6, according to some embodiments of the present application, the present application provides a blind rivet installation assembly, including a blind rivet 400, a rivet pulling device and a flexible structure 500, in which the blind rivet 400 includes a mandrel 410 and a rivet sleeve 420 sleeved on one axial end of the mandrel 410, the rivet pulling device includes a main body and a clamping head 300 installed on one end of the main body, and the clamping head 300 has a clamping cavity 320 for clamping the other axial end of the mandrel 410. The flexible structure 500 is located between the stem 410 and the walls of the gripping cavity 320, and the strength of the flexible structure 500 is less than the strength of the stem 410 and the strength of the gripping head 300.

The core bar 410 is a solid cylindrical structure with a circular cross-section. One end of the core pin 410 in the axial direction forms a stopper for abutting against the pin sleeve 420. In this particular embodiment, the core rod 410 is formed of a metallic material or a composite material, and has a high strength and a certain ductility. It is understood that the size and shape of the core pin 410 are not limited and may be set as desired.

The nail sleeve 420 has a hollow cylindrical structure, and the cross section thereof is circular. The nail sleeve 420 comprises a nail sleeve main body 421 and a nail sleeve limiting part 422, the nail sleeve main body 421 is a hollow cylindrical structure, and the inner diameter of the nail sleeve main body 421 is larger than the outer diameter of the core rod 410. The nail sleeve limiting part 422 is connected to one axial end of the nail sleeve main body 421, the outer diameter of the nail sleeve limiting part 422 is larger than that of the nail sleeve main body 421, and the outer diameter of the nail sleeve limiting part 422 is gradually reduced from one end of the nail sleeve main body 421 to the other end thereof. When the nail sleeve 420 is assembled on the core rod 410, the nail sleeve 420 is sleeved on one axial end of the core rod 410, the central axis of the nail sleeve 420 coincides with the central axis of the core rod 410, and the nail sleeve limiting part 422 is located at one end of the nail sleeve main body 421 far away from the limiting part of the core rod 410. The tack sleeve 420 is also formed of a metallic material or a composite material, and has high strength and a certain ductility.

The rivet device can be driven electrically, pneumatically or manually, depending on the driving method. In the following examples, the rivet device is electrically driven. The main body comprises a main housing and an electric driving structure accommodated in the main housing, and the main body can be held by a user and provides power for the clamping head 300 to drive the clamping head 300 to clamp the mandrel 410 of the blind rivet 400 and contract towards the body direction.

The clamping head 300 is mounted at one end of the main body and is a component for generating clamping force to clamp the blind rivet 400, the shape of the clamping cavity 320 is matched with the shape of the mandrel 410 of the blind rivet 400, one end of the mandrel 410, which is far away from the sleeve 420, can extend into the clamping cavity 320 along the axial direction of the clamping cavity 320, and the wall of the clamping cavity 320 can apply radial clamping force to the mandrel 410 to clamp the mandrel 410.

The flexible structure 500 is formed of a non-conductive material having a strength less than that of the stem 410 and that of the gripping head 300, and thus is more easily deformed by an external force than the stem 410 and the gripping head 300. When the stem 410 is clamped in the clamping cavity 320, the stem 410 and the clamping head 300 cannot directly contact under the obstruction of the flexible structure 500, but contact with the outer circular surface of the stem 410 and the cavity wall of the clamping cavity 320 through the inner side and the outer side of the flexible structure 500.

Because the flexible structure 500 which is easier to deform is arranged between the outer circular surface of the mandrel 410 and the cavity wall of the clamping cavity 320, the mandrel 410 inserted into the clamping cavity 320 is in contact with the cavity wall of the clamping cavity 320 through the flexible structure 500, so that the sliding friction between the cavity wall of the clamping cavity 320 and the mandrel 410 is converted into the static friction between the flexible structure 500 and the mandrel 410 and between the flexible structure 500 and the cavity wall of the clamping cavity 320, the clamping head 300 and the mandrel 410 are ensured not to be worn to generate fragments due to the sliding friction, and finally the functional failure of the battery 1000 due to the fragments is avoided.

According to some embodiments of the present application, the flexible structure 500 covers at least a portion of the cavity walls of the gripping cavity 320.

The flexible structure 500 is formed in the clamping cavity 320, and the flexible structure 500 may cover all cavity walls of the clamping cavity 320, or may cover only a part of cavity walls of the clamping cavity 320, and when the flexible structure 500 covers only a part of cavity walls of the clamping cavity 320, the specific positions of the cavity walls covered by the flexible structure may be set according to the cavity walls and the shape of the blind rivet 400.

Because the cavity wall of the clamping cavity 320 is covered with the flexible structure 500 which is more easily deformed, the core rod 410 inserted into the clamping cavity 320 is contacted with the cavity wall of the clamping cavity 320 through the flexible structure 500, so that the sliding friction between the cavity wall of the clamping cavity 320 and the core rod 410 is converted into the static friction between the flexible structure 500 and the core rod 410 and between the flexible structure 500 and the cavity wall of the clamping cavity 320, the clamping head 300 and the core rod 410 are ensured not to be worn to generate chips due to the sliding friction, and finally, the functional failure of the battery 1000 due to the chips is avoided.

According to some embodiments of the present application, the flexible structure 500 is sleeved in the clamping cavity 320 to form a clamping space for clamping the blind rivet 400, and the flexible structure 500 is in interference fit with the clamping head 300.

The flexible structure 500 is a hollow cylindrical structure, the cross section of the flexible structure 500 perpendicular to the axial direction is in a circular ring shape, the outer contour of the flexible structure 500 is matched with the shape of the clamping cavity 320, the clamping space axially penetrates through the flexible structure 500, and the shape of the clamping space is matched with the shape of the blind rivet 400, so that the blind rivet 400 can be axially inserted into the clamping space. The outer diameter of the flexible structure 500 is slightly larger than the inner diameter of the clamping cavity 320, so that the flexible structure 500 generates elastic pressure under the action of the clamping head 300, thereby tightly connecting the two.

Thus, the flexible structure 500 can be installed only by sleeving the flexible structure 500 in the clamping cavity 320 through interference fit, and the flexible structure 500 can be applied to the existing rivet pulling device without performing additional adaptive improvement on the structure of the rivet pulling device or additionally fixing the flexible structure 500 in the clamping head 300 by using other fasteners, so that the flexible structure 500 has a wide application range.

According to some embodiments of the present application, the flexible structure 500 at least partially covers the outer circumferential surface of the other axial end of the core rod 410.

The compliant structure 500 may cover only a partial area of the outer circumferential surface of the core pin 410 axially remote from one end of the tack bush 420 or may cover the entire area of the outer circumferential surface of the core pin 410 axially remote from one end of the tack bush 420. When the flexible structure 500 covers only a partial area of the outer circumferential surface of the core pin 410 axially away from one end of the tack bush 420, the position of the covered area thereof may be set as desired.

Since the outer circular surface of the core rod 410 is covered with the flexible structure 500 which is more easily deformed, the blind rivet 400 is in contact with the cavity wall of the clamping cavity 320 through the flexible structure 500, so that the sliding friction between the cavity wall of the clamping cavity 320 and the blind rivet 400 is converted into the static friction between the flexible structure 500 and the blind rivet 400 and between the flexible structure 500 and the cavity wall of the clamping cavity 320, the situation that the cavity wall of the clamping cavity 320 and the blind rivet 400 are abraded due to the sliding friction to generate fragments is ensured, and finally, the functional failure of the battery 1000 due to the fragments is avoided.

According to some embodiments of the present application, the flexible structure 500 is sleeved outside the core rod 410 to circumferentially surround the core rod 410, and the flexible structure 500 is in interference fit with the core rod 410.

The flexible structure 500 is a hollow cylindrical structure, the cross section of the flexible structure 500 perpendicular to the axial direction is circular, and the inner contour of the flexible structure 500 is matched with the shape of the outer circular surface of the core rod 410, so as to circumferentially surround the core rod 410. The inner diameter of the flexible structure 500 is slightly smaller than the outer diameter of the core pin 410 of the blind rivet 400, so that the flexible structure 500 generates an elastic pressure under the action of the core pin 410, thereby tightly connecting the two.

Thus, the flexible structure 500 can be mounted only by sleeving the flexible structure 500 on the core rod 410, and the flexible structure 500 can be applied to the existing blind rivet 400 without performing additional adaptive improvement on the structure of the blind rivet 400 or using additional fasteners to fix the flexible structure 500 on the core rod 410, thereby having a wide application range.

According to some embodiments of the present application, the present application provides a blind rivet installation combination, including blind rivet 400, rivet pulling device and flexible structure 500, blind rivet 400 includes core bar 410 and the nail cover 420 of locating the axial one end of core bar 410 of cover, and the rivet pulling device includes main body and installs the holding head 300 in main body one end, and holding head 300 includes a plurality of clamping jaws 310, and a plurality of clamping jaws 310 enclose jointly and close the centre gripping chamber 320 that forms and be used for centre gripping blind rivet 400. The flexible structure 500 is cylindrical, the flexible structure 500 may be sleeved on the mandrel 410 of the blind rivet 400 or in the clamping cavity 320 of the clamping head 300, and the strength of the flexible structure 500 is less than the strength of the mandrel 410 and the strength of the clamping head 300.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A blind rivet apparatus, comprising:

a main body;

2. The blind rivet apparatus of claim 1, wherein the gripping head includes a plurality of jaws, all of which collectively enclose the gripping cavity.

3. The rivet pulling device according to claim 1, wherein the flexible structure is sleeved in the clamping cavity, and the flexible structure encloses to form a clamping space for clamping the blind rivet.

4. The blind rivet apparatus of claim 3, wherein the flexible structure is an interference fit with the gripping head.

5. A blind rivet, comprising:

a core bar;

the nail sleeve is sleeved at one axial end of the core rod; and

6. The blind rivet according to claim 5, characterized in that the flexible structure is sleeved on the other axial end of the core rod and circumferentially surrounds the core rod.

7. Blind rivet according to claim 6, characterized in that the flexible structure is in an interference fit with the core pin.

8. A blind rivet installation combination is characterized by comprising:

wherein the strength of the flexible structure is less than the strength of the core bar and the strength of the clamping head.

9. Blind rivet setting assembly according to claim 8, characterized in that the flexible structure covers at least part of the cavity wall of the clamping cavity.

10. The blind rivet mounting assembly according to claim 9, wherein the flexible structure is sleeved in the clamping cavity to enclose a clamping space for clamping the blind rivet, and the flexible structure is in interference fit with the clamping head.

11. Blind rivet setting assembly according to claim 8, characterized in that the flexible structure at least partially covers the outer circumferential surface of the other axial end of the core rod.

12. The blind rivet mounting assembly according to claim 11, wherein the flexible structure is sleeved outside the core rod to circumferentially surround the core rod, and the flexible structure is in interference fit with the core rod.