CN216916410U - Bending device - Google Patents

Abstract

A bending device is used for bending a first end of a bundling element to abut against a fuel cell stack. The bending device comprises a driving device and a bending piece. The bending member has a bending surface, and the bending member is connected to the driving device in a driving manner, and is used for being driven by the driving device to approach or depart from the fuel cell stack, wherein when the bending member approaches the fuel cell stack under the driving of the driving device, a bending space is formed between the bending surface of the bending member and the fuel cell stack, and is used for keeping the first end of the bundling element in the bending space in a bending manner.

Description

Bending device

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a bending device.

Background

A fuel cell is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell) can provide a lower voltage and lower output power. In practical applications, a plurality of fuel cells are generally stacked together to form a fuel cell stack capable of achieving high voltage and high power output. Accordingly, a fuel cell stack of a fuel cell is formed by stacking a plurality of fuel cell cells and upper and lower end plates.

The fuel cell stack of the fuel cell needs to maintain stable structure during use so as to ensure that the fuel cell maintains stable and continuous power output. The fuel cell stack of the existing fuel cell is usually fixed together by fastening means, such as a screw fixing manner. However, when the fuel cells stacked together simply are directly fixed together, uneven stress is easily applied to each part of the fuel cell stack. The uneven stress on each part of the fuel cell stack may affect the sealing performance and the power transmission performance of the fuel cell stack, and ultimately the power output of the fuel cell stack. In addition, the uneven stress on each part of the fuel cell stack may cause the flow field plate of the fuel cell stack to deform due to the local over-stress, and even cause the damage of the proton exchange membrane, which results in the failure of the fuel cell stack. Therefore, the conventional fuel cell stack often needs to be pressed by a pressing machine before being fixed, so that the fuel cells of the fuel cell stack are tightly stacked together to ensure the sealing performance of the fuel cell stack.

An existing fuel cell automatic stacking device generally includes a stacking mechanism, a moving-out mechanism, a manipulator and a control mechanism, and the fuel cell automatic stacking device can move through a guide rail arranged on a workbench through a stacking rack of the stacking mechanism, so that a tightening rack of the stacking mechanism can align with a fuel cell stack arranged on a mounting table of the stacking mechanism and compress the fuel cell stack arranged on the mounting table of the stacking mechanism, and the compressed fuel cell stack is fixed together in a lead screw fixing manner.

However, when the fuel cell automatic stacking device is fixed by the lead screw, the compressed fuel cell stack is fixed together by manual operation with a special tool (such as a wrench), which results in low assembly efficiency and high cost of the fuel cell stack; in addition, in order to ensure the structural stability of the fuel cell stack, it is often necessary to use a plurality of pairs of lead screws to achieve the purpose of fastening, but this will aggravate the problem of uneven stress due to the difficulty in matching the fastening forces of the plurality of lead screws, and in particular, if the fastening forces of the plurality of lead screws are different, the fuel cell unit will be easily warped or deformed, and the sealing performance of the fuel cell stack cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An advantage of the present invention is to provide a bending apparatus capable of bending a binding member such as a band or a rope, which contributes to an improvement in the assembly efficiency of a fuel cell stack.

Another advantage of the present invention is to provide a bending apparatus, wherein, in an embodiment of the present invention, the bending apparatus can automatically bend the end of the bundling element to abut against the upper end plate of the fuel cell stack, so as to subsequently and firmly bundle the plurality of compressed fuel cells, thereby uniformly stressing the parts of the fuel cell stack.

Another advantage of the present invention is to provide a bending apparatus, wherein in an embodiment of the present invention, the bending apparatus can automatically bend the first end of the bundling element at the upper end plate of the fuel cell stack, so as to reduce the manual labor and greatly reduce the labor cost.

Another advantage of the present invention is to provide a bending device, wherein, in an embodiment of the present invention, the moving mechanism of the bending device can automatically move the bending member to different binding positions so as to bend the binding elements at the corresponding binding positions, which helps to further reduce labor cost.

Another advantage of the present invention is to provide a bending apparatus in which expensive materials or complicated structures are not required in order to achieve the above objects. The utility model thus succeeds and effectively provides a solution that not only provides a simple bending device, but also increases the practicality and reliability of said bending device.

To achieve at least one of the above advantages or other advantages and objects, there is provided a bending apparatus for bending a first end of a bundle element against a fuel cell stack, wherein the bending apparatus includes:

a driving device; and

and the bending piece is provided with a bending surface and is connected with the driving device in a driving way and is used for being driven by the driving device to approach or depart from the fuel cell stack, wherein when the bending piece is driven by the driving device to approach the fuel cell stack, a bending space is formed between the bending surface of the bending piece and the fuel cell stack and is used for keeping the first end of the bundling element in the bending space in a bending way.

According to an embodiment of the application, the bending device is adapted to be correspondingly arranged on the bundling device, and the bending surface of the bending piece is adapted to be matched with the corner part of the upper end plate of the fuel cell stack.

According to an embodiment of the present application, the bending surface of the bending member includes a transverse surface and a longitudinal surface, wherein when the bending member approaches the fuel cell stack under the driving of the driving device, the transverse surface of the bending surface is adapted to face the upper surface of the upper end plate, and the longitudinal surface of the bending surface is adapted to face the side surface of the upper end plate, so that the bending space having an inverted L-shaped structure is formed at the corner portion of the bending surface and the upper end plate of the bending member.

According to an embodiment of the present application, the transverse faces of the bending piece are perpendicular to the longitudinal faces of the bending faces.

According to an embodiment of the application, the width of the transverse surface of the bending piece is smaller than the width of the strapping groove of the upper end plate.

According to an embodiment of the application, the bending surface of the bending piece further has an arc-shaped surface, wherein the arc-shaped surface is located between the transverse surface and the longitudinal surface and is used for matching the arc-shaped bottom surface of the bundling groove of the upper end plate.

According to an embodiment of the present application, the driving device includes an actuating mechanism and a transmission mechanism, wherein the transmission mechanism is drivingly connected between the actuating mechanism and the bending member, and is configured to transmit power generated by the actuating mechanism to the bending member, so as to drive the bending member to move up and down to approach or separate from the fuel cell stack.

According to an embodiment of the application, it is a motor to actuate the mechanism, and drive mechanism includes an at least drive wheel and a drive screw, wherein an at least drive wheel set up drivably in the output shaft of motor, and drive screw set up in bend, wherein an at least drive piece with drive screw intermeshing, with when the motor is started in order to produce the revolving force, an at least drive wheel is rotated in order to drive screw reciprocates, and then passes through drive screw drives bend and reciprocate.

According to an embodiment of the application, the at least one driving wheel of the transmission mechanism includes a driving wheel and a driven wheel, wherein the driving wheel is sleeved on the output shaft of the motor in a relatively static manner, and the end portion of the transmission screw is fixedly arranged on the bending piece, wherein the external teeth of the driven wheel are meshed with the driving wheel, and the internal threads of the driven wheel are meshed with the transmission screw.

According to an embodiment of the present application, the bending apparatus further includes a mounting base, wherein the mounting base has a sliding groove and a mounting cavity, wherein the bending member is slidably disposed in the sliding groove of the mounting base, and the transmission mechanism of the driving apparatus is mounted in the mounting cavity of the mounting base, wherein the actuating mechanism of the driving apparatus is disposed on the mounting base, and the mounting base is adapted to be disposed on a pressing plate assembly of the binding apparatus.

According to an embodiment of the application, the mounting cavity of the mounting base comprises a driving wheel cavity and a driven wheel cavity which are communicated with each other, wherein the driving wheel of the transmission mechanism is rotatably mounted in the driving wheel cavity of the mounting base, and the driven wheel of the transmission mechanism is rotatably mounted in the driven wheel cavity of the mounting base, wherein the sliding groove is communicated with the driven wheel cavity, and the sliding groove longitudinally extends from the driven wheel cavity.

According to an embodiment of the present application, the mounting base further includes at least one pressure bearing, wherein the pressure bearing is disposed in the driven wheel cavity, and the pressure bearing is sleeved on the driving screw to bias the driven wheel.

According to an embodiment of the present application, the mounting base further has a locking groove, wherein the locking groove of the mounting base is adapted to be slidably locked to the slide rail of the pressure plate assembly for sliding along the slide rail of the pressure plate assembly to move to different bundling positions of the fuel cell stack.

Further objects and advantages of the utility model 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 claims.

Drawings

Fig. 1 is a schematic perspective view of an in-line apparatus for assembling a fuel cell stack according to an embodiment of the present application.

Fig. 2 shows a partially enlarged schematic view of the in-line apparatus for assembling a fuel cell stack according to the above-described embodiment of the present application.

Fig. 3A and 3B are schematic views of an application of a bending apparatus according to an embodiment of the present application.

Fig. 4 shows a perspective view of the bending device according to the above-described embodiment of the present application.

Fig. 5 shows a schematic partial cross-sectional view of the bending device according to the above-described embodiment of the application.

Fig. 6 shows an exploded view of the bending device according to the above-described embodiment of the present application.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. 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 utility model, 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 utility model.

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 an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

In the present invention, the terms "a" and "an" in the claims and the description should be understood as meaning "one or more", that is, one element may be one in number in one embodiment, and the element may be more than one in number in another embodiment. The terms "a" and "an" should not be construed as limiting the number unless the number of such elements is explicitly recited as one in the present disclosure, but rather the terms "a" and "an" should not be construed as being limited to only one of the number.

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" are to 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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 utility model. 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.

In order to solve the problems or defects caused by the lead screw fixation of the existing fuel cell automatic stacking device, as shown in fig. 1 and 2, the present application provides a flow line apparatus for assembling a fuel cell stack, which is capable of stacking a plurality of fuel cells 81 into a fuel cell stack 80 at a stacking station by a stacking device 2; the stacked fuel cell stack 80 is conveyed to a bundling station through a conveying device 3; finally, after the fuel cell stack 80 is pressed to compress the plurality of fuel cells by the bundling device 4, the fuel cell stack 80 is tightly bundled by the bundling member 70, so that the parts of the fuel cell stack 80 are uniformly stressed.

It is noted that the tying element 70 is typically embodied as a long length of a belt, wire rope or wire rope, as shown in fig. 2, so that the tying element 70 is typically wound on a reel 5 for use. Illustratively, the tying element 70 of the present application may comprise a first end 71, a second end 72 and an extension body 73 extending between the first end 71 and the second end 72, wherein the second end 72 of the tying element 70 is wound around the reel 5 as a connecting end and the first end 71 of the tying element 70 is a free end, wherein the extension body 73 of the tying element 70 is adapted to be wound around the fuel cell stack 80. Thus, when the first end 71 of the tying element 70 is pulled to rotate the reel 5 in the forward direction, the extension body 73 of the tying element 70 is released for winding the compressed fuel cell stack 80; when the reel 5 is driven to rotate reversely, the extension body 73 of the banding member 70 is rolled to be received for tightening the extension body 73 wound around the fuel cell stack 80; the fuel cell stack 80 is tightly bundled together by the extension body 73 of the strapping element 70 by welding the first end 71 of the strapping element 70 to the extension body 73 of the strapping element 70.

However, after pulling the first end 71 of the tying element 70 to wind the extension body 73 of the tying element 70 around the fuel cell stack 80, the first end 71 of the tying element 70 needs to be fixed to prevent the first end 71 of the tying element 70 from being recovered when the reel 5 is reversely rotated to tighten the extension body 73 wound around the fuel cell stack 80. Whereas the strapping element 70 is typically made of a metal or alloy material. Preferably, the strapping element 70 is made of a metal or alloy material having a yield strength of not less than 206 Mpa.

In order to automatically bend the first end 71 of the strapping element 70, the assembly line apparatus for assembling a fuel cell stack of the present application further comprises a bending device, wherein the bending device is configured to bend the first end 71 of the strapping element 70 so as to abut the first end 71 of the strapping element 70 against the compressed fuel cell stack 80, thereby facilitating subsequent tightening of the extension body 73 of the strapping element 70, such that the fuel cell stack 80 is tightly bundled together by the extension body 73 of the strapping element 70.

Specifically, referring to fig. 2 to 6 of the drawings of the present specification, a bending apparatus according to an embodiment of the present invention is illustrated, wherein the bending apparatus 1 may include a driving device 10 and a bending member 20, wherein the bending member 20 has a bending surface 21, and the bending member 20 is drivably connected to the driving device 10 for being driven by the driving device 10 to approach the fuel cell stack 80, wherein when the bending member 20 approaches the fuel cell stack 80 under the driving of the driving device 10, a bending space 200 is formed between the bending surface 21 of the bending member 20 and the fuel cell stack 80, so as to bendably maintain the first end 71 of the strapping element 70 in the bending space 200.

It should be noted that the fuel cell stack 80 generally includes an upper end plate 82 and a lower end plate 83 (as shown in fig. 2) in addition to the plurality of fuel cells 81, and the plurality of fuel cells 81 are stacked between the upper end plate 82 and the lower end plate 83, so that the bundling device 4 of the assembly line apparatus 1 for assembling a fuel cell stack of the present application presses the upper end plate 82 of the fuel cell stack 80 at the bundling station to compress the plurality of fuel cells 81 between the upper end plate 82 and the lower end plate 83.

More specifically, as shown in fig. 3A and 3B, the bending device 1 is correspondingly disposed on the bundling device 4, and the bending surface 21 of the bending member 20 of the bending device 1 is matched with the corner portion 821 of the upper end plate 82 of the fuel cell stack 80, so that after the bending member 20 is driven by the driving device 10 to approach the upper end plate 82 of the fuel cell stack 80, the bending surface 21 of the bending member 20 is matched with the corner portion 821 of the upper end plate 82 to form the bending space 200, so that the first end 71 of the bundling element 70 is bent and clamped in the bending space 200.

Illustratively, as shown in fig. 3A and 3B, the bending face 21 of the bending element 20 of the bending device 1 comprises a transverse face 211 and a longitudinal face 212, wherein when the bending member 20 is driven by the driving device 10 to approach the upper end plate 82 of the fuel cell stack 80, the transverse face 211 of the bending face 21 of the bend 20 is adapted to face the upper surface 822 of the upper end plate 82, and the longitudinal face 212 of the bending face 21 of the bending element 20 is adapted to face the side surface 823 of the upper end plate 82, so as to form the bending space 200 having an inverted L-shaped structure on the bending surface 21 of the bending piece 20 and the corner portion 821 of the upper end plate 82, so that the first end 71 of the binding element 70 will be caught after being bent in the bending space 200, facilitating the subsequent tightening of the extension body 73 of the binding element 70. It is understood that the connection between the upper surface 822 and the side surface 823 of the upper end plate 82 serves as the corner 821 of the upper end plate 82.

Preferably, the transverse face 211 of the bending face 21 of the bending element 20 is perpendicular to the longitudinal face 212 of the bending face 21, so that the transverse face 211 and the longitudinal face 212 of the bending face 21 are respectively parallel to the upper surface 822 and the side surface 823 of the upper end plate 82.

It is noted that, before the extension body 73 of the binding member 70 is wound around the fuel cell stack 80, the pressing plate assembly 41 of the binding device 4 contacts the upper end plate 82 of the fuel cell stack 80 to directly press the fuel cell stack 80 through the pressing plate assembly 41. In order to ensure uniform pressure applied to the plurality of fuel cells 81 of the fuel cell stack 80 by the pressure plate assembly 41, the pressing plane 411 of the pressure plate assembly 41 of the present application is disposed to face the upper surface 822 of the upper end plate 82 of the fuel cell stack 80 in parallel, so as to press the upper surface 822 of the upper end plate 82 face to face by the pressing plane 411 of the pressure plate assembly 41.

In order to facilitate the insertion of the first end 71 of the bundling element 70, as shown in fig. 4, the upper end plate 82 of the fuel cell stack 80 has a plurality of bundling slots 824, wherein the bundling slots 824 are arranged side by side on the upper surface 822 of the upper end plate 82, so that when the pressing plane 411 of the pressing plate assembly 41 presses the upper surface 822 of the upper end plate 82, a channel is formed between the upper end plate 82 and the pressing plate assembly 41 through the bundling slots 824, through which the first end 71 of the bundling element 70 passes to protrude out of the side surface 823 of the upper end plate 82, so as to be bent by the bending member 20.

It is noted that in other examples of the present application, the width of the transverse face 211 of the bending face 21 of the bending member 20 may be smaller than the width of the bundling slot 824 of the upper end plate 82, so that the transverse face 211 of the bending face 21 of the bending member 20 can enter the bundling slot 824 to press the bundling element 70 located in the bundling slot 824 to more securely hold the first end 71 of the bundling element 70.

Preferably, in order to facilitate the tight fitting of the bundle element 70 at the bent portion and to prevent the bundle element 70 from being damaged during the bending, tightening and bundling, the bundling groove 824 of the upper end plate 82 is rounded at the corner portion 821 of the upper end plate 82, that is, the bundling groove 824 of the upper end plate 82 has a flat bottom surface 8241 and an arc-shaped bottom surface 8242, wherein the arc-shaped bottom surface 8242 extends arcuately from the flat bottom surface 8241 of the bundling groove 824 to the side surface 823 of the upper end plate 82 so as to guide the bundle element 70 to be arcuately bent at the corner portion 821 of the upper end plate 82.

Preferably, as shown in fig. 3A and 3B, the bending surface 21 of the bending member 20 further has an arc surface 213, wherein said arcuate surface 213 is located between said transverse surface 211 and said longitudinal surface 212, to match the curved bottom surface 8241 of the strapping slot 824 of the upper end plate 82, so that the bundling element 70 can be clamped between the arc-shaped surface 213 of the bending piece 20 and the arc-shaped bottom surface 8242 of the bundling groove 824 in addition to between the transverse surface 211 of the bending piece 20 and the flat bottom surface 8241 of the bundling groove 824 and between the longitudinal surface 212 of the bending piece 20 and the side surface 823 of the upper end plate 82, which facilitates to increase the contact area between the bundling element 70 and the bending surface 21 of the bending piece 20, and helps to further stably clamp the first end 71 of the bundling element 70.

According to the above embodiment of the present application, as shown in fig. 3A to 6, the driving device 10 of the bending device 1 may include an actuating mechanism 11 and a transmission mechanism 12, wherein the transmission mechanism 12 is drivingly connected between the actuating mechanism 11 and the bending member 20, and is used for transmitting the power generated by the actuating mechanism 11 to the bending member 20 so as to drive the bending member 20 to move up and down to approach or separate from the upper end plate 82 of the fuel cell stack 80.

In an example of the present application, the actuating mechanism 11 of the driving device 10 may be, but is not limited to, implemented as a motor 111, wherein the motor 111 is used for generating a rotational force, and the transmission mechanism 12 is used for converting the rotational force generated by the motor 111 into a linear force to be transmitted to the bending member 20, so that the bending member 20 moves up and down to be close to or away from the upper end plate 82 of the fuel cell stack 80 by the linear force transmitted through the transmission mechanism 12. Of course, in other examples of the present application, the actuating mechanism 11 of the driving device 10 may be, but is not limited to, implemented as a hydraulic mechanism, a pneumatic mechanism, or the like, as long as the bending member 20 can be moved close to or away from the upper end plate 82 of the fuel cell stack 80, and the description of the present application is omitted.

Preferably, the transmission mechanism 12 of the driving device 10 can include at least one transmission wheel 121 and a transmission screw 122, wherein the at least one transmission wheel 121 is drivably disposed on the output shaft 1111 of the motor 111, and the transmission screw 122 is disposed on the bending member 20, wherein the at least one transmission member 121 and the transmission screw 122 are engaged with each other, when the motor 111 is activated to generate the rotational force, the at least one transmission wheel 121 is rotated to drive the transmission screw 122 to move up and down, so as to drive the bending member 20 to move up and down to get away from or close to the upper end plate 82 of the fuel cell stack 80 through the transmission screw 122.

Illustratively, as shown in fig. 5 and 6, the at least one driving wheel 121 of the transmission mechanism 12 of the driving device 10 includes a driving wheel 1211 and a driven wheel 1212, wherein the driving wheel 1211 is relatively statically sleeved on the output shaft 1111 of the motor 111, and an end of the transmission screw 122 is fixedly arranged on the bending member 20, wherein external teeth of the driven wheel 1212 are engaged with the driving wheel 1211, and internal threads of the driven wheel 1212 are engaged with the transmission screw 122. Thus, when the motor 111 is started to rotate the output shaft 1111 in the forward direction, the driving wheel 1211 is driven by the output shaft 1111 to drive the driven wheel 1212 to rotate clockwise on the driving screw 122, so as to drive the driving screw 122 to move downward to make the bending member 20 close to the upper end plate 82 of the fuel cell stack 80; when the motor 111 is activated to rotate the output shaft 1111 in the opposite direction, the driving wheel 1211 is driven by the output shaft 1111 to rotate the driven wheel 1212 on the driving screw 122 counterclockwise, so as to drive the driving screw 122 to move upward to move the bending member 20 away from the upper end plate 82 of the fuel cell stack 80.

According to the above-described embodiment of the present application, as shown in fig. 5 and 6, the bending apparatus 1 may further include a mounting base 30, wherein the installation base 30 has a sliding groove 31 and an installation cavity 32, wherein the bending member 20 is slidably disposed in the sliding groove 31 of the installation base 30, and the transmission mechanism 12 of the driving device 10 is mounted to the mounting cavity 32 of the mounting base 30, wherein the actuating mechanism 11 of the driving device 10 is provided to the mounting base 30, and the mounting base 30 is adapted to be provided to the platen assembly 41 of the banding device 4, when the fuel cell stack 80 is pressed by the pressure plate assembly 41, the actuating mechanism 11 is first activated to generate an actuating force, and then the actuating force is converted into a linear force by the transmission mechanism 12 to drive the bending member 20 to approach or move away from the upper end plate 82 of the fuel cell stack 80.

More specifically, the mounting cavity 32 of the mounting base 30 includes a driving wheel cavity 321 and a driven wheel cavity 322 communicating with each other, wherein the driving wheel 1211 of the transmission mechanism 12 is rotatably mounted to the driving wheel cavity 321 of the mounting cavity 32, and the driven wheel 1212 of the transmission mechanism 12 is rotatably mounted to the driven wheel cavity 322 of the mounting cavity 32, wherein the sliding groove 31 communicates with the driven wheel cavity 322, and the sliding groove 31 extends longitudinally from the driven wheel cavity 322.

Preferably, the driving wheel cavity 321 and the driven wheel cavity 322 are each implemented as a circular cavity, wherein the driving wheel cavity 321 and the driven wheel cavity 322 are arranged side by side, and the driving wheel cavity 321 and the driven wheel cavity 322 partially coincide to communicate to form the mounting cavity 32 having an infinite structure such that the external teeth of the driving wheel 1211 directly mesh with the external teeth of the driven wheel 1212.

It should be noted that the mounting base 30 of the bending apparatus 1 may further include at least one bearing 33, wherein the bearing 33 is disposed in the driven wheel cavity 322, and the bearing 33 is sleeved on the driving screw 122 to bias against the driven wheel 1212, so as to provide a biasing force for the driven wheel 1212 to transmit to the bending member 20 through the driving screw 122 while ensuring that the driven wheel 1212 rotates in the driven wheel cavity 322, so that the bending member 20 can cooperate with the upper end plate 82 to press the first end 71 of the strapping element 70.

Preferably, the mounting base 30 of the bending device 1 is movably mounted to the pressing plate assembly 41 of the bundling device 4, so that the bending device 1 is moved to different bundling positions on the fuel cell stack 80, so that the bending pieces 20 of the bending device 1 correspond to different bundling slots 824 on the upper end plate 82 in turn.

Illustratively, as shown in fig. 5 and 6, the mounting base 30 of the bending apparatus 1 further has a clamping groove 34, wherein the pressing plate assembly 41 of the bundling apparatus 4 further comprises a sliding rail 412 matching with the clamping groove 34, wherein the clamping groove 34 of the mounting base 30 is slidably clamped to the sliding rail 412 of the pressing plate assembly 42, so that the bending apparatus 1 can slide along the sliding rail 412 of the pressing plate assembly 42 to move to different bundling positions on the fuel cell stack 80.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are given by way of example only and are not limiting of the utility model. The objects of the utility model have been fully and effectively accomplished.

The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims (13)

1. A bending device for bending the first end of the strapping element against the fuel cell stack, wherein the bending device comprises:

a driving device; and

and the bending piece is provided with a bending surface and is connected with the driving device in a driving way and is used for being driven by the driving device to approach or depart from the fuel cell stack, wherein when the bending piece is driven by the driving device to approach the fuel cell stack, a bending space is formed between the bending surface of the bending piece and the fuel cell stack and is used for keeping the first end of the bundling element in the bending space in a bending way.

2. The bending device according to claim 1, wherein the bending device is adapted to be correspondingly disposed to the bundling device, and the bending surface of the bending piece is adapted to fit with a corner portion of an upper end plate of the fuel cell stack.

3. The bending apparatus according to claim 2, wherein the bending surface of the bending member comprises a transverse surface and a longitudinal surface, wherein the transverse surface of the bending surface is adapted to face the upper surface of the upper end plate and the longitudinal surface of the bending surface is adapted to face the side surface of the upper end plate when the bending member is driven by the driving means to approach the fuel cell stack, so that the bending space having an inverted L-shaped configuration is formed at the corner portion of the bending surface of the bending member and the upper end plate.

4. The bending apparatus of claim 3, wherein the transverse faces of the bending member are perpendicular to the longitudinal faces of the bending faces.

5. The bending apparatus as claimed in claim 3, wherein the transverse faces of the bending elements have a width which is smaller than the width of the strapping slots of the upper end plate.

6. The bending apparatus as claimed in claim 5, wherein the bending surface of the bending member further has an arcuate surface, wherein the arcuate surface is located between the transverse surface and the longitudinal surface for mating with the arcuate bottom surface of the strapping slot of the upper end plate.

7. The bending apparatus according to any one of claims 2 to 6, wherein the driving apparatus comprises an actuating mechanism and a transmission mechanism, wherein the transmission mechanism is drivingly connected between the actuating mechanism and the bending member for transmitting power generated by the actuating mechanism to the bending member to drive the bending member to move up and down to approach or separate from the fuel cell stack.

8. The bending apparatus according to claim 7, wherein the actuating mechanism is a motor, and the transmission mechanism comprises at least one driving wheel and a driving screw, wherein the at least one driving wheel is drivably disposed on the output shaft of the motor, and the driving screw is disposed on the bending member, wherein the at least one driving wheel is engaged with the driving screw, so that when the motor is activated to generate the rotational force, the at least one driving wheel is rotated to drive the driving screw to move up and down, and the bending member is driven to move up and down by the driving screw.

9. The bending apparatus as claimed in claim 8, wherein the at least one driving wheel of the driving mechanism includes a driving wheel and a driven wheel, wherein the driving wheel is relatively statically sleeved on the output shaft of the motor, and an end of the driving screw is fixedly disposed on the bending member, wherein external teeth of the driven wheel are engaged with the driving wheel, and internal threads of the driven wheel are engaged with the driving screw.

10. The bending apparatus according to claim 9, further comprising a mounting base, wherein the mounting base has a sliding groove and a mounting cavity, wherein the bending member is slidably disposed in the sliding groove of the mounting base, and the transmission mechanism of the driving apparatus is mounted in the mounting cavity of the mounting base, wherein the actuating mechanism of the driving apparatus is disposed in the mounting base, and the mounting base is adapted to be disposed in a platen assembly of the bundling apparatus.

11. The bending apparatus as defined in claim 10, wherein the mounting cavity of the mounting base includes a driving wheel cavity and a driven wheel cavity in communication with each other, wherein the driving wheel of the transmission mechanism is rotatably mounted to the driving wheel cavity of the mounting base and the driven wheel of the transmission mechanism is rotatably mounted to the driven wheel cavity of the mounting base, wherein the sliding slot is in communication with the driven wheel cavity and the sliding slot extends longitudinally from the driven wheel cavity.

12. The bending apparatus as claimed in claim 11, wherein the mounting base further comprises at least one pressure bearing, wherein the pressure bearing is disposed in the driven wheel cavity and the pressure bearing is sleeved on the drive screw to bias the driven wheel.

13. The bending apparatus as claimed in claim 10, wherein the mounting base further has a slot, wherein the slot of the mounting base is adapted to be slidably engaged with a slide rail of the platen assembly for sliding along the slide rail of the platen assembly to move to different bundling positions of the fuel cell stack.

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