CN212434677U

CN212434677U - Bundling device, bundling locker and fuel cell

Info

Publication number: CN212434677U
Application number: CN202021454513.7U
Authority: CN
Inventors: 李骁; 秦如学
Original assignee: Wuhan Zhongyu Power System Technology Co ltd
Current assignee: Wuhan Zhongyu Power System Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-01-29
Anticipated expiration: 2030-07-21

Abstract

A binding device, a binding locker and a fuel cell are provided. The strapping device is used for strapping a fuel cell stack and comprises a strapping element and at least one strapping locker. The elongate body of the bundling element is adapted to be wound around the fuel cell stack. The first end of the bundle element is connected with one of the bundle fasteners and the second end of the bundle element is adapted to be fixedly mounted to an end plate of the fuel cell stack or to another of the bundle fasteners, wherein each of the bundle fasteners is adapted to be rotatably mounted to the end plate of the fuel cell stack, and when the bundle fasteners are rotated to a predetermined angle, the bundle element is tightened by the bundle fasteners to maintain the extension body in a tightened state, so that the bundle device is in a self-locking state.

Description

Bundling device, bundling locker and fuel cell

Technical Field

The utility model relates to a fuel cell technical field especially relates to a binding apparatus, ties up locker and fuel cell.

Background

A fuel cell is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. Since a single fuel cell (or single fuel cell) can provide low voltage and low output power, in practical applications, a plurality of fuel cells are generally stacked together to form a fuel cell stack capable of providing high voltage and high power. Accordingly, since a fuel cell stack of a fuel cell is formed by stacking a plurality of fuel cell cells together, the fuel cell cells of the fuel cell stack must be firmly assembled together to ensure structural stability of the fuel cell stack.

Most of the fuel cell stacks of the existing fuel cells fix a plurality of fuel cells of the fuel cell stacks together in a screw fixing mode. However, this screw fixing direction requires a special tool (such as a wrench) to be able to firmly fix the plurality of fuel cells together. In particular, as the service time is prolonged, the screw is rusted and cannot be disassembled, thereby causing difficulty in disassembling the fuel cells of the fuel cell stack, which causes great inconvenience to subsequent maintenance and upkeep of the fuel cell stack.

In addition, when the fuel cell stack is fixed by using the screws, in order to secure the fixation of the fuel cell stack, a plurality of pairs of screws are often used for fastening, which not only increases the problem of uneven stress due to difficulty in matching the fastening force of different screws, but also increases the volume of the fuel cell stack, complicates the manufacturing process, and increases the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An advantage of the present invention is to provide a bundling device, a bundling locking device and a fuel cell, which can be self-locked to bundle a plurality of fuel cell units of a fuel cell stack together conveniently.

Another advantage of the present invention is to provide a bundling device, a bundling locking device and a fuel cell, wherein, in an embodiment of the present invention, the bundling device can be switched between a self-locking state and a unlocking state under the action of external force, so as to tightly bundle the plurality of fuel cell units, or to release the bundling of the plurality of fuel cell units.

Another advantage of the present invention is to provide a bundling device, bundling locker and fuel cell, wherein in an embodiment of the present invention, the user can operate the bundling device with bare hands, so that the bundling device is in the self-locking state with switch between the unlocking states, help expanding the bundling device's application scenario.

Another advantage of the present invention is to provide a bundling device, a bundling locker and a fuel cell, wherein, in an embodiment of the present invention, the bundling device can lock a free end of a bundling element, such as a string, by the bundling locker, so as to securely bundle a plurality of fuel cells of the fuel cell stack, such that each portion of the fuel cell stack is uniformly stressed.

Another advantage of the present invention is to provide a bundling device, a bundling locker and a fuel cell, wherein, in an embodiment of the present invention, the bundling locker of the bundling device can utilize the principle of a labor-saving lever, so that the free end of the bundling element can provide a larger locking force with a smaller operation force, so as to tightly bundle a plurality of fuel cell units of the fuel cell stack.

Another advantage of the present invention is to provide a binding apparatus, binding locker and fuel cell, wherein, in an embodiment of the present invention, the binding locker can have a self-locking function through an off-axis or broken-axis design, which helps to improve the practicability and reliability of the binding apparatus.

Another advantage of the present invention is to provide a bundling device, a bundling locker and a fuel cell stack, wherein in an embodiment of the present invention, the bundling device can be operated between an unlocked state and a locked state, and the bundling device is in the unlocked space formed in the unlocked state is larger than the bundling device is in the locked space formed in the locked state, so as to untie or tightly bundle the fuel cell stack as required.

Another advantage of the present invention is to provide a bundling device, a bundling locker and a fuel cell, wherein, in an embodiment of the present invention, the bundling device does not require precise parts and complex structures, and has simple manufacturing process, low cost and easy use.

Another advantage of the present invention is to provide a bundling device, a bundling locker and a fuel cell, wherein, in order to achieve the above objects, the present invention does not require expensive materials or complex structures. Therefore, the present invention successfully and effectively provides a solution that not only provides a simple strapping device, a strapping lock, and a fuel cell, but also increases the practicality and reliability of the strapping device, the strapping lock, and the fuel cell.

To achieve at least one of the above advantages or other advantages and objectives, the present invention provides a bundling apparatus for bundling a fuel cell stack, comprising:

a bundle element, wherein said bundle element has a first end, a second end, and an elongated body extending between said first end and said second end, wherein said elongated body of said bundle element is adapted to be wrapped around the fuel cell stack; and

at least one bundle locker, wherein the first end of the bundle element is connected with one of the bundle lockers and the second end of the bundle element is adapted to be fixedly mounted to an end plate of the fuel cell stack or connected with another of the bundle lockers, wherein each of the bundle lockers is adapted to be rotatably mounted to the end plate of the fuel cell stack, and when the bundle locker is rotated to a predetermined angle, the bundle element is tightened by the bundle locker to maintain the extension body in a tightened state such that the bundle device is in a self-locking state.

In an embodiment of the present invention, when the bundle locker is reversely rotated to deviate from the predetermined angle, the bundle element is released from tension by the bundle locker to maintain the extension body in a relaxed state, so that the bundle device is in an unlocked state.

In an embodiment of the present invention, the strapping lock comprises a fulcrum shaft and a swing arm assembly, wherein the fulcrum shaft is adapted to be disposed on the end plate of the fuel cell stack, and the swing arm assembly is disposed on the fulcrum shaft to rotate around an axis of the fulcrum shaft, wherein the swing arm assembly has a driving portion away from the fulcrum shaft, and the first end of the strapping element is connected to the driving portion of the swing arm assembly, wherein when the swing arm assembly rotates under an external force to pull the first end of the strapping element, the strapping element passes through the axis of the fulcrum shaft under the driving of the driving portion of the swing arm assembly, so that the strapping device is in the self-locking state.

In an embodiment of the present invention, when the binding locker is rotated to the predetermined angle, the radial arm assembly of the binding locker is adapted to be stopped by the end plate of the fuel cell stack to stop the radial arm assembly from continuing to rotate in the forward direction.

In an embodiment of the present invention, the swing arm assembly of the binding locker further has an actuating portion, wherein the driving portion of the swing arm assembly is located between the fulcrum shaft and the actuating portion of the swing arm assembly to form the binding locker with a labor-saving lever structure.

In an embodiment of the present invention, the fulcrum shaft of the binding locker includes a first shaft and a second shaft, wherein the first shaft and the second shaft are coaxially and intermittently disposed to form a crossing gap between the first shaft and the second shaft for allowing the binding element to cross the axis of the fulcrum shaft through the crossing gap.

In an embodiment of the present invention, the swing arm assembly of the strapping fixture includes a first support arm and a second support arm, wherein the first support arm and the second support arm extend radially outward from the first shaft and the second shaft of the fulcrum shaft, respectively, and the driving portion of the swing arm assembly is located between the first support arm and the second support arm, so that when the strapping element is tensioned by the driving portion of the swing arm assembly, the extending body of the strapping element aligns with the crossing gap to pass through the axis of the fulcrum shaft from the crossing gap.

In an embodiment of the present invention, the swing arm assembly of the strapping locker further includes a functional member, wherein the functional member is disposed between the first support arm and the second support arm, for providing the driving portion and the actuating portion of the swing arm assembly between the first support arm and the second support arm.

In an embodiment of the present invention, the swing arm assembly of the binding locker is formed by processing a plate.

In an embodiment of the present invention, the driving portion of the swing arm assembly is formed by curling the middle region of the plate upward to form the driving portion having a hook-shaped structure.

In an embodiment of the present invention, the actuating portion of the swing arm assembly is formed by curling the front edge region of the plate upward, so that the actuating portion of the swing arm assembly is tilted upward.

In an embodiment of the present invention, the fulcrum shaft of the strapping lock includes a first shaft, and the swing arm assembly includes a first support arm, wherein the first support arm extends radially outward from the first shaft, and the driving portion of the swing arm assembly is located at one side of the first support arm, so that when the strapping element is tensioned by the driving portion of the swing arm assembly, the extending body of the strapping element is deviated from the first shaft to pass through the axis of the fulcrum shaft from a shaft end outside space of the first shaft.

In an embodiment of the invention, the bundling element is made of a metal or alloy material.

According to another aspect of the present invention, there is further provided a binding locker for cooperating with a binding element to bind a fuel cell stack, wherein the binding locker is adapted to be connected with a first end of the binding element to constitute a binding device, and a second end of the binding element is adapted to be fixedly mounted to an end plate of the fuel cell stack or connected with another binding locker, wherein the binding locker is adapted to be rotatably mounted to the end plate of the fuel cell stack, and when the binding locker is rotated to a predetermined angle, the binding locker is adapted to tension the binding element to keep the extension body wound on the fuel cell stack in a tightened state so that the binding device is in a self-locking state.

According to another aspect of the present invention, the present invention further provides a fuel cell, including:

a fuel cell stack, wherein the fuel cell stack comprises two end plates and a plurality of fuel cell cells stacked between the two end plates; and

at least one strapping device, wherein each of the strapping devices comprises:

a bundle element, wherein the bundle element has a first end, a second end, and an extension body extending between the first end and the second end, wherein the extension body of the bundle element wraps around the fuel cell stack; and

at least one bundle locker, wherein the first end of the bundle element is connected with one of the bundle lockers and the second end of the bundle element is fixedly mounted to the end plate of the fuel cell stack or connected with the other of the bundle lockers, wherein each of the bundle lockers is rotatably mounted to the end plate of the fuel cell stack, and when the bundle locker is positively rotated to a predetermined angle, the bundle element is tightened by the bundle locker to maintain the extension body in a tightened state such that the bundle device is in a self-locking state.

In an embodiment of the invention, the outer surface of the end plate of the fuel cell stack is provided with a receiving groove, wherein the binding lockers are rotatably mounted in the receiving groove of the end plate for the binding device being in the self-locking state to concealingly receive the binding lockers.

In an embodiment of the invention, the end plate of the fuel cell stack is further provided with a groove corresponding to the bending of the bundling element for concealingly receiving the bending of the bundling element.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.

Drawings

Fig. 1 is a schematic view of a strapping device according to an embodiment of the present invention, wherein the strapping device is in a self-locking state.

Fig. 2 is a schematic view of the strapping device according to the above embodiment of the present invention, in which the strapping device is in an unlocked state.

Fig. 3 is a perspective view of the strapping device according to the above embodiment of the present invention.

Fig. 4 is a partially enlarged schematic cross-sectional view of the strapping device according to the above embodiment of the present invention in the self-locking state.

Fig. 5 is a partially enlarged schematic cross-sectional view of the strapping device according to the above embodiment of the present invention in the unlocked state.

Fig. 6 is a schematic view illustrating a manufacturing process of the binding apparatus according to the above embodiment of the present invention.

Fig. 7 shows a variant of the strapping device according to the above embodiment of the invention.

Fig. 8 is a schematic flow chart illustrating a method of manufacturing a strapping device in accordance with an embodiment of the present invention.

Fig. 9 is a flow chart illustrating a method of using a strapping device in accordance with an embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

In the present application, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element or a plurality of elements may be included in one embodiment or a plurality of elements may be included in another embodiment. The terms "a" and "an" and "the" and similar referents are to be construed to mean that the elements are limited to only one element or group, unless otherwise indicated in the disclosure.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Referring to fig. 1 to 5 of the drawings, a strapping apparatus according to an embodiment of the present invention is illustrated. Specifically, as shown in fig. 1 to 5, the binding apparatus 1 is used for binding the fuel cell stack 500, wherein the binding apparatus 1 includes a binding member 10 and a binding locker 20. The bundling element 10 has a first end 11, a second end 12 and an extension body 13 extending between the first end 11 and the second end 12, wherein the second end 12 of the bundling element 10 is adapted to be fixedly mounted to an end plate 501 of the fuel cell stack 500 and the extension body 13 of the bundling element 10 is adapted to be wrapped around the fuel cell stack 500. The bundle locker 20 is adapted to be rotatably mounted to the end plate 501 of the fuel cell stack 500, and the bundle locker 20 is coupled to the first end 11 of the bundle element 10, wherein when the bundle locker 20 is rotated (i.e., rotated in a forward direction) to a predetermined angle, the bundle element 10 is tightened by the bundle locker 20 to maintain the extension body 13 in a tightened state, so that the bundle device 1 is in a self-locking state for applying a uniform bundle force to the plurality of fuel cells 502 of the fuel cell stack 500 to uniformly bundle the plurality of fuel cells 502 of the fuel cell stack 500.

It will be appreciated that when the load binder 20 is positively rotated to the predetermined angle, the load binder 20 is blocked from further positive rotation, so that the strapping device 1 is continuously maintained at the predetermined angle under the pulling force of the strapping elements 10 to be in a self-locking state. Furthermore, the predetermined angle may be, but is not limited to, implemented as an angle between a tension arm on the strapping device 1 and a horizontal plane (as shown in fig. 4); preferably, the range of the predetermined angle may be implemented between 0 and 5 °.

Similarly, when the bundle locker 20 is reversely rotated to deviate from the predetermined angle, the bundle element 10 is released from being tightened by the bundle locker 20 to put the extension body 13 in a loose state, so that the bundle device 1 is in an unlocked state for releasing the bundle force applied to the plurality of fuel cells 502 of the fuel cell stack 500.

More specifically, as shown in fig. 3 to 5, the bundle locker 20 includes a fulcrum shaft 21 and a swing arm assembly 22, wherein the fulcrum shaft 21 is adapted to be disposed at the end plate 501 of the fuel cell stack 500, and the swing arm assembly 22 is disposed at the fulcrum shaft 21 to be rotated about the axis 210 of the fulcrum shaft 21. The radial arm assembly 22 has a drive 2201 remote from the fulcrum shaft 21, wherein the first end 11 of the strapping element 10 is connected to the drive 2201 of the radial arm assembly 22.

Thus, as shown in fig. 4, when the swing arm assembly 22 is rotated forward around the axis 210 of the fulcrum shaft 21 by an external force to make the driving portion 2201 approach the end plate 501 of the fuel cell stack 500, the bundling element 10 passes through the axis 210 of the fulcrum shaft 21 under the driving of the driving portion 2201 of the swing arm assembly 22, that is, the bundling element 10 is gradually tensioned and is gradually driven from above the side of the axis 210 of the fulcrum shaft 21 to below the side of the axis 210 of the fulcrum shaft 21, so that the bundling device 1 is in the self-locking state, and the extension body 13 of the bundling element 10 is kept tensioned to tightly wind the fuel cell stack 500 for uniformly bundling the plurality of fuel cells 502 of the fuel cell stack 500 under the force. In other words, as shown in fig. 4, when the radial arm assembly 22 rotates around the axis 210 of the fulcrum shaft 21 in the forward direction under the action of the external force, the driving portion 2201 of the radial arm assembly 22 will drive the first end 11 of the bundling element 10 to rotate around the axis 210 of the fulcrum shaft 21 synchronously, so that the first end 11 of the bundling element 10 moves to the side below the axis 210 (the right side below as shown in fig. 4), and the bundling apparatus 1 is in the self-locking state. It is to be understood that reference to "forward" in the context of the present invention refers to a direction (clockwise as viewed in fig. 4 and 5) in which the strapping element 10 can be tensioned; accordingly, the term "reverse" in the context of reverse rotation as used herein refers to a direction (counterclockwise as viewed in fig. 4 and 5) in which the strapping element 10 can be released from tension.

It is noted that the strapping element 10 of the present invention is preferably made of a metal or alloy material. For example, the strapping element 10 may be, but is not limited to being, embodied as a wire rope, or a wire band, among others. Of course, in other examples of the present invention, the strapping element 10 may also be implemented as a rope or a band made of a material such as fiber or polymer, which is not described in detail herein.

In particular, since the extension body 13 of the bundling element 10 is flexibly extended (i.e. has a certain flexibility), so that the bundling element 10 will apply a pulling force to the driving portion 2201 of the swing arm assembly 22 along the extension body 13, as shown in fig. 5, before the bundling element 10 passes through the axis 210 of the fulcrum shaft 21, the pulling force applied by the bundling element 10 to the driving portion 2201 of the swing arm assembly 22 is opposite to the forward rotation direction of the swing arm assembly 22 in the direction perpendicular to the force arm, so that the bundling device 1 is in the unlocked state.

As shown in fig. 4, after the strapping element 10 passes through the axis 210 of the fulcrum shaft 21, the component force F of the pulling force exerted by the strapping element 10 on the driving portion 2201 of the swing arm assembly 22 in the direction perpendicular to the moment arm is in the same direction as the forward rotation direction of the swing arm assembly 22. In this way, when the external force applied to the radial arm assembly 22 is removed, the radial arm assembly 22 does not rotate reversely under the pulling of the bundling element 10, so that the bundling element 10 is kept tensioned continuously, and the bundling apparatus 1 is self-locked to be in the self-locking state without additionally providing a locking mechanism, which helps to simplify the self-structure of the bundling apparatus 1.

It will be appreciated that when a sufficient amount of reverse force is applied to the swing arm assembly 22 such that the force torque applied by the reverse force is greater than the pulling force torque applied by the binding element 10, the swing arm assembly 22 will rotate in the reverse direction to allow the binding element 10 to relax, which allows the binding apparatus 1 to be unlocked without the need for an additional unlocking mechanism.

Furthermore, in an example of the present invention, as shown in fig. 4, when the radial arm assembly 22 is rotated forward to approach the end plate 501 of the fuel cell stack 500, such that the bundling element 10 passes through the axis 210 of the fulcrum shaft 21, the radial arm assembly 22 will continue to rotate forward under the pulling force applied by the bundling element 10 until abutting against the end plate 501 of the fuel cell stack 500 (i.e. the bundling apparatus 1 is rotated to the predetermined angle), at which time the end plate 501 of the fuel cell stack 500 will prevent the radial arm assembly 22 from continuing to rotate forward, such that the bundling apparatus 1 is in a self-locking state. Of course, in other examples of the present invention, the strapping device 1 may further include a stop member (not shown) for stopping the radial arm assembly 22 from further rotating in the forward direction (i.e., the strapping device 1 is rotated to the predetermined angle) after the strapping element 10 passes through the axis 210 of the fulcrum shaft 21, so that the strapping device 1 is in the self-locking state.

It should be noted that although the features and advantages of the strapping device 1 of the present invention are illustrated in fig. 1 to 5 and described below by taking the strapping device 1 including only one strapping locker 20 as an example, it will be understood by those skilled in the art that the specific number of the strapping lockers 20 disclosed in fig. 1 to 5 and described below is only an example and is not intended to limit the scope and content of the present invention, for example, in other examples of the strapping device 1, the number of the strapping lockers 20 may be two, the driving portions 2201 of the swing arm assemblies 22 of two strapping lockers 20 are respectively connected to the first end 11 and the second end 12 of the strapping element 10 to tighten the extension body 13 of the strapping element 10 by the two strapping lockers 20, the binding effect of the binding apparatus 1 can be achieved.

Furthermore, the strapping element 10 of the strapping device 1 of the invention is preferably wound around the fuel cell stack 500 one or more times, so that the strapping device 1 forms a strapping space for strapping the fuel cell stack 500. Of course, in other examples of the present invention, the bundling element 10 may be wound only half a turn around the fuel cell stack 500 to form a bundling space for bundling the fuel cell stack 500 by means of two bundling lockers 20.

According to the above embodiment of the present invention, more specifically, as shown in fig. 1 to 5, the fulcrum shaft 21 of the bundle locker 20 of the bundling apparatus 1 is adapted to be rotatably mounted to the end plate 501 of the fuel cell stack 500, and the radial arm assembly 22 of the bundle locker 20 is fixedly mounted to the fulcrum shaft 21, so that the radial arm assembly 22 can rotate about the axis 210 of the fulcrum shaft 21, so that the driving portion 2201 of the radial arm assembly 22 can approach or depart from the end plate 501 of the fuel cell stack 500. Of course, in other embodiments of the present invention, the fulcrum shaft 21 of the bundle fastener 20 of the bundle device 1 may also be fixedly mounted to the end plate 501 of the fuel cell stack 500, and the radial arm assembly 22 of the bundle fastener 20 is rotatably mounted to the fulcrum shaft 21, so that the radial arm assembly 22 can still rotate around the axis 210 of the fulcrum shaft 21, and the driving portion 2201 of the radial arm assembly 22 can move closer to or away from the end plate 501 of the fuel cell stack 500. It is understood that the radial arm assembly 22 of the present invention can also be, but is not limited to, fixed to the fulcrum shaft 21 by welding, screwing, clamping or integrally connecting.

It is noted that the first end 11 of the strapping element 10 is preferably sleeved on the driving portion 2201 of the radial arm assembly 22. For example, the first end 11 of the strapping element 10 may be pre-configured in a closed loop configuration (as may be achieved by bending the first end 11 of the strapping element 10 upon itself and then securing the first end), and the driving portion 2201 of the swing arm assembly 22 may be correspondingly configured as a hook, such that when the strapping device 1 is in the unlocked state, the first end 11 of the strapping element 10 may be directly sleeved on the driving portion 2201 of the swing arm assembly 22 to complete the connection therebetween. Of course, in other examples of the present invention, the first end 11 of the binding element 10 may also be connected to the driving portion 2201 of the swing arm assembly 22 by, but not limited to, riveting, screwing, welding, clamping, or hooking.

According to the above embodiment of the present invention, as shown in fig. 3, the radial arm assembly 22 of the strapping lock device 20 further has an actuating portion 2202, and the driving portion 2201 of the radial arm assembly 22 is located between the actuating portion 2202 of the radial arm assembly 22 and the fulcrum shaft 21, so as to form the strapping lock device 20 with a labor-saving lever structure, which facilitates the user to operate the strapping lock device 20 by hands, so as to switch the strapping device 1 between the self-locking state and the unlocking state. In other words, the power point of the bundle fastener 20 is located at the actuating portion 2202 of the swing arm assembly 22, the resistance point of the bundle fastener 20 is located at the driving portion 2201 of the swing arm assembly 20, and the fulcrum of the bundle fastener 20 is located at the fulcrum shaft 21. Since the driving portion 2201 of the swing arm assembly 22 is located between the actuating portion 2202 of the swing arm assembly 22 and the fulcrum shaft 21, the power arm of the bundle fastener 20 is larger than the resistance arm of the bundle fastener 20, so that when a small external force is applied to the actuating portion 2202 of the swing arm assembly 22, the driving portion 2201 of the swing arm assembly 22 can apply a large pulling force to the bundle element 10 to pull the extension body 13 of the bundle element 10, which helps to improve the bundling stability and reliability of the bundling apparatus 1.

Preferably, as shown in fig. 3, the fulcrum shaft 21 of the strapping locker 20 includes a first shaft 211 and a second shaft 212, and the first shaft 211 and the second shaft 212 are coaxially and spaced apart to form a crossing gap 213 between the first shaft 211 and the second shaft 212 for allowing the strapping element 10 to cross the axis 210 of the fulcrum shaft 21 through the crossing gap 213. In other words, the fulcrum shaft 21 is implemented as a broken shaft with the crossing gap 213 by a broken shaft design to allow the strapping element 10 to cross the axis 210 of the fulcrum shaft 21 via the crossing gap 213 of the broken shaft.

Specifically, as shown in fig. 3, the swing arm assembly 22 of the strapping binder 20 may include a first support arm 221 and a second support arm 222, wherein the first support arm 221 and the second support arm 222 extend radially outward from the first shaft 211 and the second shaft 212 of the fulcrum shaft 21, respectively, and the driving portion 2201 of the swing arm assembly 22 is located between the first support arm 221 and the second support arm 222, such that when the strapping element 10 is tensioned by the driving portion 2201 of the swing arm assembly 22, the extension body 13 of the strapping element 10 is aligned with the crossing gap 213 to cross the axis 210 of the fulcrum shaft 21 through the crossing gap 213, thereby switching the strapping device 1 between the unlocked state and the self-locking state.

More specifically, as shown in fig. 3, the swing arm assembly 22 of the lashing locker 20 may further include a function member 223, wherein the function member 223 is disposed between the first support arm 221 and the second support arm 222 to provide the driving portion 2201 and the actuating portion 2202 of the swing arm assembly 22 between the first support arm 221 and the second support arm 222.

More preferably, as shown in fig. 6, the radial arm assembly 22 is formed by processing a plate 400, that is, the first support arm 221, the second support arm 222 and the functional member 223 of the radial arm assembly 22 are formed by processing the plate 400, which helps to simplify the manufacturing process of the radial arm assembly 22 and reduce the overall manufacturing cost of the binder locker 20.

Illustratively, as shown in fig. 6, the left edge area 401 and the right edge area 402 of the plate 400 are respectively bent upward to form the first support arm 221 and the second support arm 222 of the radial arm assembly 22, so as to enhance the structural strength of the radial arm assembly 22; the leading edge region 403 of sheet 400 is reverse curled upward to form the actuating portion 2202 of the swing arm assembly 22 such that the braking portion 2202 of the swing arm assembly 22 is tilted upward so that a user holds the actuating portion 2202 of the swing arm assembly 22 to apply an external force to the swing arm assembly 22; the middle region 404 of the plate 400 is positively curled upward to form the driving portion 2201 of the radial arm assembly 22, so that the driving portion 2201 of the radial arm assembly 22 has a hook-like structure, so as to sleeve the first end 11 of the strapping element 10 on the driving portion 2201. It will be appreciated that the rear edge region 405 of the sheet material 400 can be fixedly attached to the fulcrum shaft 21 such that the first support arm 221 and the second support arm 222 extend outwardly in a radial direction of the fulcrum shaft 21.

In addition, the present invention can, but is not limited to, first perform cutting process on the plate 400 along the left, right and rear sides of the middle area 404, and then curl the middle area 404 of the plate 400 upwards in the forward direction to form the driving portion 2201 having a hook-shaped structure.

Most preferably, the left edge area 401 and the right edge area 402 of the sheet material 400 are respectively bent upwards by 90 ° to form the first support arm 221 and the second support arm 222 parallel to each other.

In other embodiments of the present invention, as shown in fig. 7, the radial arm assembly 22 of the lashing fastener 20 may also include the first support arm 221, and accordingly, the fulcrum shaft 21 of the lashing locker 20 may include only the first shaft 211, wherein the first support arm 221 extends radially outward from the first shaft 211 of the fulcrum shaft 21, and the driving part 2201 of the swing arm assembly 22 is located at one side of the first support arm 221, such that, when the first end 11 of the tying element 10 is coupled to the driving part 2201 of the swing arm assembly 22 to be tightened, the extension body 13 of the tying element 10 is deviated from the first shaft 211, so as to cross the axis 210 of the fulcrum shaft 21 from the space outside the shaft end of the first shaft 211, the strapping device 1 can still be switched between the unlocked state and the self-locking state. In other words, the fulcrum shaft 21 is implemented as an offset shaft by an offset shaft design to allow the strapping element 10 to pass through the axis 210 of the fulcrum shaft 21 via the shaft end outside space of the broken shaft.

In summary, as shown in fig. 8, the present invention can further provide a method for manufacturing a bundling device, comprising the steps of:

s310: after cutting the left side, the right side and the rear side of the middle area of a plate material, positively curling the middle area of the plate material upwards to form a driving part of a swing arm assembly, wherein the driving part is provided with a hook-shaped structure;

s320: bending the left edge area and/or the right edge area of the plate material upwards to form a first support arm and/or a second support arm of the swing arm assembly respectively;

s330: arranging the rear edge area of the plate on a fulcrum shaft, so that the first supporting arm and the second supporting arm respectively extend outwards along the radial direction of the fulcrum shaft to form a bundling locker; and

s340: the bundle fastener is attached to a first end of a bundle element to form a bundling apparatus.

It should be noted that, as shown in fig. 8, the manufacturing method of the strapping device may further include the steps of:

s350: bending a front edge region of the sheet material upward to form an actuating portion of the swing arm assembly, wherein the actuating portion is tilted upward.

According to another aspect of the present invention, there is further provided a fuel cell, as shown in fig. 1 and 2, wherein the fuel cell comprises a fuel cell stack 500 and the binding device 1, wherein the fuel cell stack 500 comprises two end plates 501 and a plurality of fuel cells 502 stacked between the two end plates 501, wherein the first end 11 of the binding member 10 of the binding device 1 is connected with one of the binding lockers 20, and the second end 12 of the binding member 10 is fixedly mounted to the end plate 501 of the fuel cell stack 500 or connected with the other of the binding lockers 20, wherein each of the binding lockers 20 is rotatably mounted to the end plate 501 of the fuel cell stack 500, and when the binding locker 20 is rotated forward to a predetermined angle, the binding member 10 is tightened by the binding locker 20 to keep the extension body 10 in a tightened state In a state such that the strapping device 1 is in a self-locking state.

Illustratively, as shown in fig. 1 and 2, the bundle locker 20 of the bundling device 1 and the second end 12 of the bundling element 10 are respectively disposed at the same end plate 501 of the fuel cell stack 500, and the extension body 13 of the bundling element 10 passes around the other end plate 501 of the fuel cell stack 500 to wind the fuel cell stack 500, wherein the bundle locker 20 can be rotated to be switched between the unlocked state and the self-locking state, and when the bundling device 1 is in the self-locking state, the bundling device 1 applies a uniform bundling force to the plurality of fuel cells 502 of the fuel cell stack 500 so as to uniformly bundle the plurality of fuel cells 502 of the fuel cell stack 500; when the bundle locker 20 is in the unlocked state, the bundling device 1 releases the bundling force applied to the plurality of fuel cells 502 of the fuel cell stack 500.

Preferably, as shown in fig. 1, the outer surface of the end plate 501 of the fuel cell stack 500 is provided with a receiving groove 503, wherein the bundle locker 20 is rotatably mounted in the receiving groove 503 of the end plate 501 for concealingly receiving the bundle locker 20 when the bundling apparatus 1 is in the self-locking state, so as to conceal and protect the bundle locker 20, which helps to ensure the overall aesthetic appearance of the fuel cell.

Illustratively, as shown in fig. 1, when the radial arm assembly 22 of the bundle fastener 20 is unscrewed from the receiving groove 503 of the end plate 501, the first end 11 of the bundle element 10 can be sleeved on the driving portion 2201 of the radial arm assembly 22 of the bundle fastener 20, and the extending body 13 of the bundle element 10 is in a loose state; as the radial arm assembly 22 of the bundle locker 20 is slowly rotated back to the receiving groove 503 of the end plate 501, the extension body 13 of the bundle element 10 is gradually tightened by the bundle locker 20 to be changed from a loose state to a tightened state; until the extension body 13 of the bundle element 10 is in the optimum state capable of locking the fuel cell stack 500 when the radial arm assembly 22 of the bundle locker 20 is completely rotated back into the receiving groove 503 of the end plate 501, that is, the bundle device 1 is in the self-locking state.

More preferably, as shown in fig. 1, the end plate 501 of the fuel cell stack 500 is further provided with a groove 504 corresponding to the bent portion of the bundle element 10 for concealingly receiving the bent portion of the bundle element 10 to prevent the bent portion of the bundle element 10 from being exposed outside the end plate 501 to be worn or damaged, so as to protect the bundle element 10.

It is noted that the second end 12 of the strapping element 10 may be fixedly disposed to the end plate 501 of the fuel cell stack 500 by, but not limited to, a screw coupling. For example, as shown in fig. 1, the end plate 501 of the fuel cell stack 500 has a fixing hole 505 allowing a screw to be screwed in, so as to transversely press the second end 12 of the bundle element 10 located in the fixing hole 505 by tightening the screw screwed in the fixing hole 505, to fix the second end 12 of the bundle element 10 to the end plate 501. Of course, in other examples of the present invention, the second end 12 of the strapping element 10 may be fixedly connected to the end plate 501 by welding, riveting, screwing or sleeving, for example.

According to another aspect of the present invention, as shown in fig. 9, the present invention further provides a method for using a strapping device, comprising the steps of:

s410: respectively disposing a binding locker 20 of a binding apparatus 1 and a second end 12 of a binding element 10 to an end plate 501 of a fuel cell stack 500, wherein an extension body 13 of the binding element 10 is wound around the fuel cell stack 500, and a first end 11 of the binding element 10 is connected to the binding locker 20; and

s420: the strapping lockers 20 are rotated forward to a predetermined angle such that the strapping device 1 is in a self-locking state to maintain the extension body 13 of the strapping element 10 in a tightened state for tightly strapping the plurality of fuel cells 502 of the fuel cell stack 500.

More specifically, as shown in fig. 9, the method for using the binding apparatus of the present invention may further include the steps of:

s430: reversely rotating the bundle locker 20 to be deviated from the preset angle so that the bundle device 1 is in an unlocked state to maintain the extension body 13 of the bundle element 10 in a loose state for releasing the bundled plurality of fuel cells 502 of the fuel cell stack 500.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. A strapping device for strapping a fuel cell stack, comprising:

2. The strapping device of claim 1, wherein when the strapping locks are reversely rotated to deviate from the predetermined angle, the strapping element is released from the tension by the strapping locks to maintain the extension body in a slack state, so that the strapping device is in an unlocked state.

3. The strapping device of claim 2 wherein the strapping lock includes a fulcrum shaft and a swing arm assembly, wherein the fulcrum shaft is adapted to be disposed on the end plate of the fuel cell stack and the swing arm assembly is disposed on the fulcrum shaft for rotation about an axis of the fulcrum shaft, wherein the swing arm assembly has a drive portion remote from the fulcrum shaft and the first end of the strapping element is coupled to the drive portion of the swing arm assembly, wherein when the swing arm assembly is rotated under an external force to pull the first end of the strapping element, the strapping element is driven by the drive portion of the swing arm assembly to traverse the axis of the fulcrum shaft to place the strapping device in the self-locking state.

4. The strapping device of claim 3 wherein the radial arm assembly of the strapping lock is adapted to be stopped by the end plate of the fuel cell stack to stop the radial arm assembly from further rotation when the strapping lock is rotated to the predetermined angle.

5. The strapping device of claim 3 wherein the swing arm assembly of the strapping lock further has an actuating portion, wherein the driving portion of the swing arm assembly is located between the fulcrum shaft and the actuating portion of the swing arm assembly to form the strapping lock with a labor-saving lever structure.

6. The strapping device of claim 5 wherein the fulcrum shaft of the strapping binder includes a first shaft and a second shaft, wherein the first shaft and the second shaft are coaxially and spaced apart to define a traversing gap therebetween for allowing the strapping element to traverse the axis of the fulcrum shaft through the traversing gap.

7. The strapping device of claim 6 wherein the swing arm assembly of the strapping binder includes a first support arm and a second support arm, wherein the first support arm and the second support arm extend radially outward from the first axis and the second axis of the fulcrum shaft, respectively, and the actuating portion of the swing arm assembly is positioned between the first support arm and the second support arm such that the extension body of the strapping element aligns with the pass-through gap to pass from the pass-through gap through the axis of the fulcrum shaft when the strapping element is tensioned by the actuating portion of the swing arm assembly.

8. The strapping device of claim 7 wherein the swing arm assembly of the strapping binder further includes a functional member, wherein the functional member is disposed between the first support arm and the second support arm for providing the drive portion and the actuator portion of the swing arm assembly between the first support arm and the second support arm.

9. The strapping device of claim 8 wherein the radial arm assembly of the strapping binder is formed from a sheet material.

10. A strapping apparatus according to claim 9 wherein the drive section of the radial arm assembly is curled upwardly from a middle region of the sheet material to form the drive section having a hook-like configuration.

11. The strapping device of claim 10 wherein the actuating portion of the swing arm assembly is curled upwardly from a front edge region of the sheet material to tilt the actuating portion of the swing arm assembly upwardly.

12. The strapping device of claim 5 wherein the fulcrum shaft of the strapping binder includes a first shaft and the swing arm assembly includes a first support arm, wherein the first support arm extends radially outward from the first shaft and the actuating portion of the swing arm assembly is located to one side of the first support arm such that when the strapping element is tensioned by the actuating portion of the swing arm assembly, the extension body of the strapping element is offset from the first shaft to spatially traverse the axis of the fulcrum shaft from outside the axial end of the first shaft.

13. A binding apparatus according to any one of claims 1 to 12, in which the binding elements are made of a metal or alloy material.

14. A bundle fastener for cooperating with a bundling member to bundle the fuel cell stack, wherein the bundle fastener is adapted to be coupled with a first end of the bundling member to constitute a bundling apparatus, and a second end of the bundling member is adapted to be fixedly mounted to an end plate of the fuel cell stack or coupled with another of the bundle fasteners, wherein the bundle fastener is adapted to be rotatably mounted to the end plate of the fuel cell stack, and when the bundle fastener is rotated to a predetermined angle, the bundle fastener is adapted to tension the bundling member to maintain the extension body wound around the fuel cell stack in a tensioned state such that the bundling apparatus is in a self-locking state.

15. A fuel cell, comprising:

at least one strapping device, wherein each of the strapping devices comprises:

at least one bundle locker, wherein the first end of the bundle element is connected with one of the bundle lockers and the second end of the bundle element is fixedly mounted to the end plate of the fuel cell stack or connected with the other of the bundle lockers, wherein each of the bundle lockers is rotatably mounted to the end plate of the fuel cell stack, and when the bundle locker is rotated to a predetermined angle, the bundle element is tightened by the bundle locker to maintain the extension body in a tightened state such that the bundle device is in a self-locking state.

16. The fuel cell of claim 15, wherein an outer surface of the end plate of the fuel cell stack is provided with a receiving groove, wherein the bundle locker is rotatably mounted in the receiving groove of the end plate for concealingly receiving the bundle locker when the bundle device is in the self-locking state.

17. The fuel cell according to claim 15 or 16, wherein the end plate of the fuel cell stack is further provided with a groove corresponding to the bent portion of the bundle element for concealingly receiving the bent portion of the bundle element.