WO2023141938A1

WO2023141938A1 - Insert structure, battery and power-consuming device

Info

Publication number: WO2023141938A1
Application number: PCT/CN2022/074572
Authority: WO
Inventors: 蔡海盛; 林志强; 孙硕; 吴自强
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-08-03
Also published as: CN221508352U

Abstract

Provided in the present application are an insert structure, a battery and a power-consuming device. The insert structure comprises a first connector and a nut, wherein a mounting groove is formed in the first connector, the nut is provided with a columnar hollow portion for a bolt to be inserted, and the nut is embedded in the mounting groove and is configured to be movable in the mounting groove in at least one of a radial direction and an axial direction of the columnar hollow portion. Therefore, even if the first connector has a certain degree of manufacturing error, a reliable connection between the first connector and a counterpart can be achieved by means of the insert structure of the present application, and situations such as installation failure or a skewed bolt do not occur.

Description

Insert structure, battery and electric device

technical field

This application relates to the connection structure of injection molded parts, in particular to the insert structure, batteries and electrical devices.

Background technique

When attaching the counterpart to the injection molded part, an insert nut may be provided on the injection molded part, and the counterpart can be attached to the injection molded part by inserting a bolt into the insert nut. The industry has been seeking to improve the installation accuracy and installation reliability of counterpart parts relative to injection molded parts.

Utility model content

The present application is made in view of the above technical problems, and its purpose is to provide an insert structure, a battery and an electrical device that can ensure installation accuracy and realize reliable installation.

In order to achieve the above object, the first aspect of the present application provides an insert structure, which includes a first connecting piece and a nut, an installation groove is formed on the first connecting piece, and the nut has a columnar hollow for insertion of a bolt. part, the nut is embedded in the installation groove and configured to be movable in at least one of the radial direction and the axial direction of the cylindrical hollow part in the installation groove.

Thus, since the nut can move in the radial direction and/or axial direction of the columnar hollow portion into which the bolt is inserted while being inserted into the mounting groove of the first connecting member, even if one of the mounting holes of the first connecting member or the like There is a certain degree of manufacturing error in the upward direction, and the error can also be absorbed by the movement of the nut, so as to ensure that the installation accuracy will not be reduced, and there will be no adverse situations such as failure to install, skewed and damaged bolts.

In some embodiments, the nut has a nut body and a flange, the nut body integrally includes a hollow cylinder and a plate-shaped base at one end of the hollow cylinder, the flange is mounted on the hollow the other end of the column.

Thereby, the strength of the nut itself can be ensured, and the nut can be embedded in the installation groove so as to be movable in the installation groove so as not to fall off easily.

In some embodiments, the hollow cylindrical body has a protruding portion protruding radially outward, and the flange is mounted on the protruding portion.

Thereby, the strength around the head portion of the hollow columnar body of the nut can be enhanced, and reliable fastening with the bolt can be ensured.

In some embodiments, the outer diameter of the flange is larger than the outer diameter of the protruding portion of the hollow cylinder.

Thus, the nut can be inserted into the installation groove through the cooperation between the flange plate and the periphery of the installation groove, and a large movable margin can be ensured.

In some embodiments, the plate-shaped base includes a flat plate portion and an end edge portion disposed at an end portion of the flat plate portion, and the flat plate portion and the end edge portion are connected to form a right angle.

Thus, since the plate-shaped base has a flat plate and an end edge connected to the flat plate at right angles, the strength of the plate-shaped base can be ensured, and reliable connection between the first connecting piece and the counterpart can be achieved through the nut.

In some embodiments, a through hole is provided on the bottom surface of the installation groove of the first connector, and the nut embedded in the installation groove is configured to be able to move so that the cylindrical hollow part and the The relative position of the vias.

Thus, even if there is a manufacturing error in the position of the through hole on the first connecting piece, since the cylindrical hollow part of the nut can always be opposite to the through hole, it can be ensured that the bolt inserted into the hollow cylindrical body is inserted into the through hole in the correct posture and position. holes for a reliable connection.

In some embodiments, the installation slot includes a first slot space, a second slot space and a third slot space communicated with each other, the plate-like base of the nut is located in the first slot space, and the hollow cylindrical body Located in the second slot space, the flange is located in the third slot space.

Thereby, the nut can be easily inserted into the first connection piece.

In some embodiments, the inner diameter of the second groove space is smaller than the outer diameter of the flange and the outer diameter of the plate base, and the axial dimension of the second groove space is smaller than the The axial dimension of the hollow cylindrical body; the axial dimension of the first groove space is larger than the axial dimension of the plate base.

Therefore, the nut is not easy to come out of the mounting groove, and can also move in the radial direction and the axial direction of the cylindrical hollow part in the mounting groove, so various manufacturing errors can be eliminated, and high mounting accuracy can be achieved.

A second aspect of the present application provides a battery, which includes the insert structure provided in the first aspect of the present application.

In this way, the processing accuracy requirements for the first connecting piece can be reduced, and the installation accuracy of the first connecting piece and the counterpart can be ensured, thereby ensuring high installation accuracy of the battery.

A third aspect of the present application provides an electric device, which includes the battery provided in the third aspect of the present application.

In this way, the installation accuracy of the battery can be improved, and the quality of the electric device can be further improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Fig. 2 is a schematic diagram showing the structure of a battery box according to an embodiment of the present application.

Fig. 3 is a schematic structural view schematically showing an insert structure according to an embodiment of the present application.

Fig. 4 is a schematic diagram showing the structure of a nut according to an embodiment of the present application.

FIG. 5 is a schematic view schematically showing the internal structure of an insert structure according to an embodiment of the present application.

Explanation of reference signs:

1000-vehicle; 100-battery; 200-controller; 300-motor;

201-box; 201a-first part; 201b-second part; 202-battery unit

203-first connector; 204-nut; 205-installation groove; 205a-first groove space;

205b-the second groove space; 205c-the third groove space; 206-through hole;

207-nut body; 208-flange; 209-hollow column; 210-extrusion;

211-plate base; 211a-flat plate; 211b-end edge; 212-column hollow;

213-installation claw; S-installation surface.

Detailed ways

Hereinafter, specific embodiments of the present application will be described in detail with reference to the drawings. The drawings are only used to illustrate preferred embodiments of the application, and should not be considered as limiting the application. Throughout the drawings, the same parts or elements are denoted by the same reference numerals.

Advantages and benefits of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are exemplary, and do not limit the scope of protection claimed in the present application.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Top", "Bottom", "Inner", "Outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the implementation of this application. Examples and simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In addition, in the description of the embodiments of the present application, "plurality" means more than two, unless otherwise specifically defined.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or integrated; it can also be a mechanical connection, it can also be an electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the description of the embodiments of the present application, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the second feature "on" or "under" the second feature. Indirect contact through intermediaries. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In such as batteries, etc., there are situations where two connectors need to be tightly connected, especially when one of the connectors is an injection molded part, an insert nut is usually embedded in the injection molded part, and the counterpart ( Another connecting piece connected with the above-mentioned connecting piece) is embedded with a light hole insert. When installing, the bolts are sequentially passed through the insert nut and the light hole insert and fastened together, thereby realizing the connection between the two connecting pieces. connect. However, such a mounting structure requires high machining accuracy.

After research, the inventors of the present application found that, for the above-mentioned connection structure, if the processing accuracy is low and the assembly accuracy is high, there will be holes between the nut insert and the through-hole insert on the counterpart. Misalignment, which has the potential to cause the bolt to fail to fit or for the bolt to screw into the thread at an angle that damages the insert nut.

In view of the above problems, the inventors of the present application have developed an insert structure in which the insert nut can be moved, thereby avoiding the poor assembly that may occur in the above-mentioned prior art.

Therefore, in order to solve the above problems, the present application provides an insert structure, a battery including the insert structure, and an electrical device.

The batteries involved in this application can be any batteries, such as battery modules and battery packs, or primary batteries and secondary batteries. For example, secondary batteries include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead storage) batteries, lithium Ion batteries, sodium-ion batteries, polymer batteries, etc. This battery is suitable for a variety of electrical equipment that uses batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include aircraft, rockets, aerospace Aircraft and spacecraft, etc.; batteries are used to provide electrical energy for the above-mentioned electrical equipment.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries and electrical equipment using batteries. However, for the sake of concise description, the following embodiments are all An electric vehicle is taken as an example for illustration, but it is obvious that the applicable scenarios of the battery involved in the embodiment of the present application and the electric equipment involved in the embodiment of the present application are not limited to the electric vehicle.

FIG. 1 is a schematic structural diagram of a vehicle 1000 involved in an embodiment of the present application. As shown in FIG. 1 , the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The vehicle 1000 is equipped with a battery 100 , and the battery 100 may be installed at the bottom, head, or tail of the vehicle 1000 . The battery 100 can be used for power supply of the vehicle 1000 , for example, the battery 100 can be used as an operating power source of the vehicle 1000 . The vehicle 1000 may further include a controller 200 and a motor 300 , the controller 200 is used to control the battery 100 to supply power to the motor 300 , for example, it can be used for starting the vehicle 1000 , navigating, and working power requirements during driving.

In some embodiments of the present application, the battery 100 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1000 .

Fig. 2 is a schematic diagram showing the structure of a battery box according to an embodiment of the present application. The battery 100 includes a case 201 and a battery cell 202 , and the battery cell 202 is accommodated in the case 201 . Wherein, the box body 201 is used to provide accommodating space for the battery cells 202, and the box body 201 can adopt various structures. In some embodiments, the box body 201 may include a first part 201a and a second part 201b, the first part 201a and the second part 201b cover each other, the first part 201a and the second part 201b jointly define a of accommodation space. The second part 201b can be a hollow structure with one end open, the first part 201a can be a plate-shaped structure, and the first part 201a covers the opening side of the second part 201b, so that the first part 201a and the second part 201b jointly define an accommodation space ; The first part 201a and the second part 201b can also be hollow structures with one side opening, and the opening side of the first part 201a covers the opening side of the second part 201b. Of course, the box body 201 formed by the first part 201a and the second part 201b can be in various shapes, such as a cylinder, a cuboid, and the like.

In order to meet different power requirements, the battery 100 may include a plurality of battery cells 202 , and the battery cells 202 refer to the smallest unit forming a battery module or a battery pack. A plurality of battery cells 202 can be connected in series and/or in parallel via electrode terminals for various applications. The batteries involved in this application may include battery modules or battery packs. Wherein, the plurality of battery cells 202 may be connected in series, in parallel or in parallel, and the mixed connection refers to a mixture of series and parallel. The battery in the embodiment of the present application may be directly composed of a plurality of battery cells 202 , or may be composed of a battery module first, and then the battery module is composed of a battery.

In some embodiments, the battery cell 202 may be a lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, which is not limited in this embodiment of the present application. The battery cell 202 may be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. The battery cells 202 are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which is not limited in this embodiment of the present application. Cylindrical battery cells can be divided into cylindrical battery cells, polygonal prismatic battery cells, etc. according to the cross-sectional shape of the cylindrical surface.

In addition, the battery cell 202 generally includes an end cap, a case, and a cell assembly. The end cap refers to a component that covers the opening of the casing to isolate the internal environment of the battery cell 202 from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the housing to fit the housing. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easy to deform when being squeezed and collided, so that the battery cell 202 can have higher structural strength , safety performance can also be improved. Functional components such as electrode terminals can be provided on the end cap. The electrode terminals can be used for electrical connection with the battery cell assembly for outputting or inputting electric energy of the battery cells 202 . The material of the end cap can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in this embodiment of the present application. In some embodiments, an insulator can also be provided inside the end cover, and the insulator can be used to isolate the electrical connection components in the housing from the end cover, so as to reduce the risk of short circuit. Exemplary, the insulator may be plastic, rubber, or the like.

The casing is a component used to cooperate with the end cap to form the internal environment of the battery cell 202, wherein the formed internal environment can be used to accommodate the battery cell assembly, electrolyte (not shown in the figure) and other components. The casing and the end cover may be independent parts, and an opening may be provided on the casing, and the internal environment of the battery cell is formed by making the end cover cover the opening at the opening. Without limitation, the end cover and the housing can also be integrated. Specifically, the end cover and the housing can form a common connection surface before other components enter the housing. When the inside of the housing needs to be encapsulated, the end Cover the housing. The housing can be in various shapes and dimensions, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the battery cell assembly. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not particularly limited in this embodiment of the present application.

The battery cell assembly is a component in the battery cell 202 where the electrochemical reaction occurs. The casing may contain one or more cell assemblies. The cell assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and usually a separator is provided between the positive electrode sheet and the negative electrode sheet. The part of the positive electrode sheet and the negative electrode sheet with the active material constitutes the main body of the cell assembly, and the parts of the positive electrode sheet and the negative electrode sheet without the active material each constitute tabs (not shown in the figure). The positive pole tab and the negative pole tab can be located at one end of the main body together or at two ends of the main body respectively. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

The insert structure of the present application can be applied to the above-mentioned battery, for example, it can be used for the connection of two supporting components in the battery pack, and it can also be applied to the connection of other components relative to the above-mentioned box body 201, or between other components in the battery. connections etc. Of course, the application scenarios of the insert structure of the present application are not limited to batteries, and can also be applied to other scenarios suitable for adopting the insert structure.

Fig. 3 schematically shows a schematic diagram of an insert structure according to an embodiment of the present application. As shown in Figure 3, the insert structure includes a first connecting piece 203 and a nut 204, on which a mounting groove 205 is formed, the nut 204 has a cylindrical hollow part 212 for inserting a bolt (not shown), and the nut 204 is embedded in the mounting groove 205 and is configured to be movable in at least one of the radial direction and the axial direction of the columnar hollow portion 212 in the mounting groove 205 .

Specifically, as shown in FIG. 3 and FIG. 5 , the first connecting part 203 may be a metal part or an injection molded part of resin or the like. A mounting groove 205 is formed on the first connecting member 203, and the mounting groove 205 is integrally formed by injection molding, for example.

As shown in FIG. 3 , the installation groove 205 has a slit in the circumferential direction, and the slit is formed to allow the passage of the nut 204 , so that the nut 204 can be inserted into the installation groove 205 through the slit.

The nut 204 is a component that realizes the fast connection between the first connecting piece 203 and another connecting piece (also called the counterpart) by cooperating with the bolt, therefore, the center of the nut 204 has a cylindrical hollow part for the insertion of the bolt or similar components 212. The nut 204 is made of metal, for example. When the nut 204 is inserted into the installation groove 205 of the first connector 203 to form an insert structure, the nut 204 can move in the installation groove 205 along at least one of the radial direction and the axial direction of the cylindrical hollow portion 212 . Here, the axial direction refers to the axial direction of the cylindrical hollow portion 212 , the radial direction refers to the radial direction of the cylindrical hollow portion 212 , and the axial direction is perpendicular to the radial direction.

Thus, since the nut can be properly moved in the axial direction and/or radial direction in the state of being inserted into the mounting groove of the first connecting member, even if there is a certain degree of manufacturing error in the mounting hole of the first connecting member, the The movement of the nut absorbs the error, so that the installation accuracy will not be reduced, and there will be no problems such as failure to install, skewed and damaged bolts, etc.

In some embodiments, as shown in FIGS. 3 to 5 , the nut 204 has a nut body 207 and a flange 208, the nut body 207 integrally includes a hollow cylinder 209 and a plate-shaped base 211 at one end of the hollow cylinder 209, The flange 208 is mounted on the other end of the hollow cylinder 209 .

Specifically, the nut 204 has a nut body 207 as an integral structure. The nut body 207 includes a hollow cylindrical body 209 forming the above-mentioned cylindrical hollow portion 212 , and has a plate-shaped base 211 at one end of the hollow cylindrical body 209 . The plate surface of the plate base 211 is perpendicular to the hollow columnar body 209 . There is a flange 208 at the other end of the hollow cylinder. As a result, the nut 204 forms a shape that is thin in the middle and thick at both ends as a whole. Such a shape makes the nut 204 embedded in the mounting groove 205 not easy to come out.

In some embodiments, as shown in FIG. 4 , the hollow cylindrical body 209 has an extending portion 210 extending radially outward, and the flange 208 is mounted on the extending portion 210 .

The flange 208 is locked to the protruding portion 210 by, for example, the mounting claws 213 so as to be mounted to the hollow columnar body 209 .

In some embodiments, as shown in FIGS. 3 to 5 , the outer diameter of the flange 208 is larger than the outer diameter of the protruding portion 210 of the hollow cylinder 209 .

Thus, the nut 204 can be inserted into the installation groove 205 through the cooperation between the flange 208 and the periphery of the installation groove 205 (for example, the upper surface of the groove wall forming the second groove space 205 b shown in FIG. 3 ). Moreover, if the outer diameter of the flange 208 is designed to be large, even if the nut 204 is allowed to move within a larger radial range in the installation groove 205 , it can still cover the installation groove 205 .

In some embodiments, as shown in FIGS. 3 to 5 , the plate-shaped base 211 includes a flat plate portion 211a and an end edge portion 211b provided at the end of the flat plate portion 211a, and the flat plate portion 211a and the end edge portion 211b form a right-angled way connected.

The plate-shaped base 211 includes a flat plate portion 211 a connected to the hollow cylindrical body 209 and perpendicular to the hollow state body. In the center of the flat plate portion 211a is provided a hole having the same inner diameter as the columnar hollow portion 212 and communicating with each other.

An edge portion 211b is provided at an edge of the flat plate portion 211a. In the drawing, the two end edge portions 211b are provided on opposite end edges, but the present invention is not limited thereto, and end edge portions may be provided on the entire peripheral edge.

Thus, since the plate-shaped base 211 has a flat plate portion 211a and an end edge portion 211b connected to the plate-shaped portion 211a at right angles, the strength of the plate-shaped base 211 can be ensured, and the first connecting member 203 can be realized by the nut 204. Reliable connection to counterparts.

In some embodiments, as shown in FIG. 3 and FIG. 5 , a through hole 206 is provided on the bottom surface of the mounting groove 205 of the first connector 203, and the nut 204 embedded in the mounting groove 205 is configured to be movable to make a hollow column. The position where the cylindrical hollow portion 212 of the body 209 faces the through hole 206 .

When the first connector 203 is installed with the counterpart, the nut 204 can be adjusted earlier so that its columnar hollow 212 is opposite to the through hole 216, and then a bolt is inserted, and the bolt (not shown) that passes through the columnar hollow 212 of the nut 204 ) continue to pass through the through hole 206 and be inserted into the threaded hole on the counterpart side to realize a fastening connection. At this time, the plate base 211 of the nut 204 abuts against the first connecting piece, thereby realizing the positioning of the first connecting piece 203 relative to the counterpart.

It can be seen that even if there is a manufacturing error in the position of the through hole on the first connector 203, since the cylindrical hollow portion 212 of the hollow cylindrical body 209 of the nut 204 can always be opposite to the through hole 206, therefore, the bolts inserted into the hollow cylindrical body 209 can be ensured It is inserted into the through-hole 206 with the correct posture and position, and then inserted into the threaded hole on the counterpart side, so that reliable connection can be performed.

In some embodiments, as shown in FIG. 3 and FIG. 5 , the mounting groove 205 includes a first groove space 205a, a second groove space 205b and a third groove space 205c communicating with each other, and the plate base 211 of the nut 204 is located in the first groove space. In the slot space 205a, the hollow cylindrical body 209 is located in the second slot space 205b, and the flange 208 is located in the third slot space 205c.

Specifically, as shown in FIG. 5, a first groove space 205a, a second groove space 205b, and a third groove space 205c are sequentially provided from the bottom in FIG. The accommodation space of the nut 204.

Thereby, the nut can be easily inserted into the first connection piece.

In some embodiments, as shown in Figure 3 and Figure 5, the inner diameter of the second groove space 205b is smaller than the outer diameter of the flange 208 and the outer diameter of the plate base 211, and the axial direction of the second groove space 205b The dimension is smaller than the axial dimension of the hollow cylindrical body 209 ; the axial dimension of the first groove space 205 a is larger than the axial dimension of the plate base 211 .

Specifically, the inner diameter of the second groove space 205b is smaller than the outer diameter of the flange 208 and the outer diameter of the plate base 211, so that it can be ensured that the nut 204 will not escape from the installation groove 204 along the axial direction, and the second The inner diameter of the second groove space 205b limits the maximum movement range of the nut 204 in the radial direction. The axial dimension of the second groove space 205b is smaller than the axial dimension of the hollow cylindrical body 209, and the axial dimension of the first groove space 205a is greater than the axial dimension of the plate-shaped base 211, thereby allowing the nut While the nut 204 moves in the axial direction, the range in which the nut 204 moves in the axial direction is limited.

Therefore, the nut is not easy to come out of the installation groove, and can also move in the radial direction and the axial direction in the installation groove, so various manufacturing errors can be eliminated, and high installation accuracy can be realized.

In this way, the processing accuracy requirements for the first connecting piece 203 can be reduced, and the installation accuracy between the first connecting piece 203 and the counterpart can be ensured, thereby ensuring high installation accuracy of the battery.

A third aspect of the present application provides an electric device, which includes the battery provided in the second aspect of the present application.

Next, specific embodiments of the present application will be described as examples.

As shown in FIG. 3 to FIG. 5 , the first connecting member 203 is, for example, an injection molded part, and an installation groove 205 is formed on the injection molded part, and the nut 204 is plugged into the installation groove 205 as an insert nut. The nut installed in the installation groove 205 can move axially and radially in the installation groove 205 . Therefore, in the process of fastening and connecting the injection molded part with the counterpart, the nut 204 can move within a certain range in conjunction with the position of the bolt, so as to ensure that the bolt can be inserted into the threaded hole on the side of the counterpart in a correct posture, thereby realizing lock attached.

After the bolt is locked, the axial freedom of the nut 204 is limited, and since there is friction between the nut 204 and the injection molded part, the locking force on the counterpart can be transmitted to the injection molded part through the nut 204, so that the injection molded part and the injection molded part can be connected. Reliable connection between counterparts. At the same time, it can also reduce the requirement on the dimensional tolerance of the injection molded part under the condition of ensuring the installation accuracy, and reduce the manufacturing cost of the injection molded part.

The embodiments of the present application have been described above, but those skilled in the art should understand that the present application is not limited to the above embodiments. The above-mentioned embodiments are merely examples, and within the scope of the technical solutions of the present application, embodiments that have substantially the same configuration as the technical idea and exert the same effects are included in the technical scope of the present application. In addition, without departing from the scope of the present application, various modifications conceivable by those skilled in the art are added to the embodiments, and other forms constructed by combining some components in the embodiments are also included in the scope of the present application. .

Claims

An insert structure, characterized in that it comprises:

a first connecting piece on which a mounting groove is formed; and

The nut has a cylindrical hollow portion into which a bolt is inserted, the nut is fitted in the installation groove, and is configured to be movable in at least one of a radial direction and an axial direction of the cylindrical hollow portion in the installation groove.
The insert structure according to claim 1, characterized in that,

The nut has a nut body and a flange. The nut body integrally includes a hollow column and a plate-shaped base at one end of the hollow column. The flange is installed at the other end of the hollow column.
The insert structure according to claim 2, characterized in that,

The hollow cylindrical body has a protruding portion protruding radially outward, and the flange plate is installed on the protruding portion.
The insert structure according to claim 3, characterized in that,

The outer diameter of the flange is larger than the outer diameter of the protruding portion of the hollow column.
The insert structure according to claim 2, characterized in that,

The plate-shaped base includes a flat plate portion and an end edge portion provided at an end portion of the flat plate portion, and the flat plate portion and the end edge portion are connected to form a right angle.
The insert structure according to claim 2, characterized in that,

A through hole is provided on the bottom surface of the installation groove of the first connector, and the nut inserted in the installation groove is configured to be movable to a position where the columnar hollow portion faces the through hole.
The insert structure according to claim 2, characterized in that,

The installation slot includes a first slot space, a second slot space and a third slot space communicated with each other, the plate base of the nut is located in the first slot space, and the hollow column is located in the second slot In the space, the flange is located in the third groove space.
The insert structure according to claim 7, characterized in that,

The inner diameter of the second groove space is smaller than the outer diameter of the flange plate and the outer diameter of the plate base, and the axial dimension of the second groove space is smaller than the hollow cylindrical body. the axial dimension;

The dimension in the axial direction of the first groove space is larger than the dimension in the axial direction of the plate base.
A battery comprising the insert structure according to any one of claims 1 to 8
An electrical device comprising the battery described in claim 9.