Clamping structure and clamping device

Abstract

The utility model provides a clamping structure and a clamping device, the clamping structure is used for being pressed on a bipolar plate, the clamping structure comprises a clamping body, the clamping body is used for being arranged on one side of the bipolar plate, and the position of the clamping body is adjustably arranged in the direction close to or away from the bipolar plate; the pressing assembly is telescopically arranged on the clamping body, so that in the process that the clamping body presses the bipolar plate, the pressing assembly gradually retracts until the clamping body is in pressing contact with the bipolar plate, and after the pressing force on the clamping body gradually disappears, the pressing assembly gradually stretches out to push the clamping body to be separated from the bipolar plate; the problem that a sealing gasket on a bipolar plate is adhered to an upper clamping plate in the airtight test process of the bipolar plate in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell air tightness detection technical field, specifically, relate to a clamping structure and clamping device. BACKGROUND

[0002] Fuel cells can efficiently convert the electrochemical potential of fuel into electrical energy. Among the many fuel cells, hydrogen fuel cells stand out with their use of hydrogen fuel, not only clean and environmentally friendly, but also excellent performance. However, to achieve perfect operation of this technology, the air tightness of the stack is crucial. Among them, the air tightness of the bipolar plate is a key factor affecting the air tightness of the entire stack.

[0003] In the existing fuel cell bipolar plate air tightness detection technology, two methods are usually used to ensure air tightness: one is to use upper and lower clamping plates and sealing rings that match the shape of the bipolar plate to block the bipolar plate; The other is to directly use upper and lower horizontal clamping plates to block.

[0004] However, both methods face a common challenge: when conducting air tightness tests, the pressure opportunity can exert a pressure of up to 10kN, which can cause the gasket on the bipolar plate to stick to the upper clamping plate during testing, making it difficult to separate in time and affecting subsequent processes. SUMMARY

[0005] The main purpose of the utility model is to provide a clamping structure and clamping device to solve the problem of the sealing gasket on the bipolar plate sticking to the upper clamping plate during air tightness testing in the prior art.

[0006] To achieve the above purpose, according to one aspect of the utility model, a clamping structure is provided for pressing on a bipolar plate, the clamping structure includes a clamping body for setting on one side of the bipolar plate and adjustably setting in the direction of approaching or moving away from the bipolar plate; a compression assembly is telescopically arranged on the clamping body, so that during the process of pressing the clamping body on the bipolar plate, the compression assembly gradually retracts until the clamping body and the bipolar plate are in tight contact, and after the compression force on the clamping body gradually disappears, the compression assembly gradually extends to push the clamping body away from the bipolar plate.

[0007] Further, the compression assembly includes a compression component, the clamping body is provided with an adjusting cavity extending to the surface of the clamping body, and the compression component is telescopically arranged in the adjusting cavity to extend out of the adjusting cavity or retract into the adjusting cavity.

[0008] Further, the compression assembly further includes an elastic component, the elastic component is telescopically arranged in the adjusting cavity, and one end of the elastic component is connected with the compression component to push the compression component to extend out of the adjusting cavity.

[0009] Further, the pressing component is provided with a limiting recess hole near one end of the elastic component, and the one end of the elastic component is arranged in the limiting recess hole.

[0010] Further, the pressing component is a columnar body with a stepped structure, and the adjusting cavity is a stepped hole matched with the stepped structure.

[0011] Further, the pressing component comprises a connecting part and a pressing part connected with each other, the connecting part is located on the side of the pressing part away from the bipolar plate, the outer circumferential surface of the connecting part protrudes from the outer circumferential surface of the pressing part to form a first limiting step between the connecting part and the pressing part, and the adjusting cavity is provided with a second limiting step matched with the limiting step.

[0012] Further, the end surface of the pressing part for pressing the bipolar plate is provided with a flexible gasket.

[0013] Further, the clamping body comprises a pressing plate and a fixing plate, the pressing assembly is arranged on the pressing plate, and the fixing plate is arranged on the side of the pressing plate away from the bipolar plate.

[0014] Further, the number of the pressing components is multiple, and the multiple pressing components are arranged at intervals along the circumference of the clamping body to avoid the sealing gasket on the bipolar plate and be located outside the sealing gasket.

[0015] According to another aspect of the utility model, a clamping device is also provided, which comprises a clamping structure arranged on a bipolar plate and a supporting structure arranged below the bipolar plate, and the clamping structure is the above-mentioned clamping structure.

[0016] By the technical scheme of the utility model, the clamping structure of the utility model is arranged on the bipolar plate, the clamping structure comprises a clamping body, the clamping body is arranged on one side of the bipolar plate and is adjustably arranged along the direction close to or away from the bipolar plate, a pressing assembly is telescopically arranged on the clamping body, in the process of arranging the clamping body on the bipolar plate, the pressing assembly is gradually retracted until the clamping body is in contact with the bipolar plate under pressure, and after the pressure disappears, the pressing assembly is gradually extended to push the clamping body away from the bipolar plate. In this way, the utility model is provided with a clamping body, and the telescopically designed pressing assembly is arranged in the clamping body, in the process of arranging the clamping body on the bipolar plate, the pressing assembly can be gradually retracted to ensure that the bipolar plate and the clamping structure form stable contact under high pressure. After detection is completed, the pressure disappears, the pressing assembly is gradually extended to effectively push the clamping body away from the bipolar plate, avoid the adhesion between the bipolar plate and the clamping body, realize automatic peeling, effectively solve the problem that the sealing gasket on the bipolar plate is adhered to the upper clamping plate in the process of the airtightness test of the bipolar plate in the prior art, and significantly improve the production efficiency and the automation level. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A cross-sectional view of an embodiment of the clamping structure and the clamping device according to the present application is shown;

[0019] Figure 2 A schematic view of the overall structure of the clamping structure and the clamping device of the present application is shown; and

[0020] Figure 3 A perspective view of the clamping structure and the clamping device is shown. Figure 1 A front view of the clamping structure and the clamping device is shown.

[0021] Among them, the above-mentioned drawings include the following reference signs:

[0022] 10, clamping body; 20, pressing assembly; 30, adjusting cavity;

[0023] 210, pressing part;

[0024] 220, elastic part;

[0025] 211, connecting part;

[0026] 212, pressing part;

[0027] 110, pressing plate;

[0028] 120, fixed plate;

[0029] 310, first cavity;

[0030] 320, second cavity. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] As Figures 1 to 3As shown, the clamping structure of the utility model is used for being arranged on the bipolar plate, the clamping structure includes clamping body 10, the clamping body 10 is used for being arranged on one side of bipolar plate, and is adjustably arranged along the direction close to or away from bipolar plate;Compression assembly 20, compression assembly 20 is telescopically arranged on clamping body 10, to in the process of clamping body 10 being arranged on bipolar plate, compression assembly 20 gradually retracts until clamping body 10 and bipolar plate are compressed contact, and after the compression force on clamping body 10 gradually disappears, compression assembly 20 gradually extends, to push clamping body 10 and bipolar plate apart.

[0033] As can be seen, the utility model is provided with a clamping body 10, and a compression assembly 20 with telescopic design is arranged in the clamping body 10, in the process of clamping body 10 compressing bipolar plate, compression assembly 20 can gradually retract, to ensure that bipolar plate and clamping structure form stable contact under high pressure. After detection is completed, the compression force disappears, compression assembly 20 gradually extends, effectively pushing clamping body 10 and bipolar plate apart, avoiding the adhesion between bipolar plate and clamping body 10, realizing automatic peeling, effectively solving the problem that the sealing gasket on bipolar plate will be adhered to the upper clamping plate in the process of bipolar plate air tightness test in the prior art, and significantly improving production efficiency and automation level.

[0034] Specifically, in the existing bipolar plate air tightness detection process, clamping body 10 needs to be cleaned regularly to remove foreign matter and glue overflow, but this method can only alleviate the problem, and the efficiency is low. The compression assembly 20 provided by the utility model has automatic telescopic function, can automatically peel clamping body 10 and bipolar plate, reduces manual intervention, saves cost, and guarantees the continuity of production line.

[0035] In the compression process, the telescopic action of the compression assembly 20 of the utility model is flexible, can complete the compression and peeling process without damaging the surface of bipolar plate, avoids that the traditional peeling method may cause scratches on the surface of bipolar plate or deform bipolar plate, thereby improving the qualified rate of finished bipolar plate and reducing the scrap rate of bipolar plate.

[0036] As shown, Figure 1 Compression assembly 20 includes compression component 210, clamping body 10 is provided with adjusting cavity 30, adjusting cavity 30 extends to the surface of clamping body 10, and compression component 210 is telescopically arranged in adjusting cavity 30 to extend out of adjusting cavity 30 or retract into adjusting cavity 30. This design makes compression component 210 can freely telescope in adjusting cavity 30, can meet that bipolar plate is stably compressed by compression component 210 under different pressure conditions, and after pressure relief, compression component 210 can push clamping body 10 and bipolar plate apart.

[0037] Specifically, the adjusting cavity 30 is composed of two parts, the first part of the adjusting cavity 30 extends to the surface of the clamping body 10, and the second part is embedded in the interior of the clamping body 10; and the cross section of the former is smaller than that of the latter to form a stepped hole.

[0038] As shown in Figure 1 and Figure 3 The pressing assembly 20 further comprises an elastic component 220, which is telescopically arranged in the adjusting cavity 30, and one end of the elastic component 220 is connected with the pressing component 210 to push the pressing component 210 to extend out of the adjusting cavity 30.

[0039] Optionally, the elastic component 220 is a compression spring.

[0040] Specifically, the elastic component 220 provided by the utility model can provide elastic force after the pressing force disappears, so that the pressing component 210 automatically extends out of the adjusting cavity 30, thereby realizing automatic peeling of the clamping body 10 and the bipolar plate.

[0041] As shown in Figure 3 , the end of the pressing component 210 close to the elastic component 220 is provided with a limiting concave hole, and the end of the elastic component 220 is arranged in the limiting concave hole. Through the cooperation of the limiting concave hole and the end of the elastic component, the elastic component 220 is limited, which avoids excessive displacement of the elastic component 220 in the telescopic process, and guarantees the stability and reliability of the structure.

[0042] Specifically, the pressing component 210 is a columnar body with a stepped structure, and the adjusting cavity 30 is a stepped hole matched with the stepped structure. The cooperation of the columnar body with the stepped structure and the stepped hole can position the pressing component 210, accurately control the telescopic movement of the pressing component 210, facilitate the installation and positioning of the pressing component 210, and increase the compactness of the structure.

[0043] In an embodiment of the utility model, the pressing component 210 of the application can also be a three-prism pyramid with a stepped structure, and the adjusting cavity 30 is a stepped hole matched with the shape of the three-prism pyramid.

[0044] In another embodiment of the utility model, the pressing component 210 of the application can also be a polyhedron with a stepped structure, and the adjusting cavity 30 is a stepped hole matched with the shape of the polyhedron.

[0045] As shown in Figure 3 , the pressing component 210 comprises a connecting part 211 and a pressing part 212 connected with each other, the connecting part 211 is located on the side of the pressing part 212 away from the bipolar plate, the outer peripheral surface of the connecting part 211 protrudes from the outer peripheral surface of the pressing part 212 to form a first limiting step between the connecting part 211 and the pressing part 212, and the adjusting cavity 30 is provided with a second limiting step matched with the limiting step for limiting.

[0046] As shown in Figure 3 , the adjusting cavity 30 comprises a first cavity 310 and a second cavity 320 arranged in steps, wherein the elastic component 220 is arranged in the first cavity 310, the connecting part 211 is movably arranged in the first cavity 310, and the pressing part 212 is movably arranged in the first cavity 310 and the second cavity 320.

[0047] Optionally, at least part of the pressing part 212 is made of a flexible material or a metal material; or a flexible gasket is arranged on the end face of the pressing part 212 for pressing the bipolar plate. The flexible material or the flexible gasket arranged on the end face of the pressing part 212 can avoid damage to the surface of the bipolar plate during pressing, and the use of the flexible material or the gasket can adapt to the slight unevenness of the surface of the bipolar plate, improve the pressing effect, and reduce the deformation or damage of the bipolar plate caused by improper pressing.

[0048] Preferably, for the part of the pressing part 212 that requires high strength and high durability, a metal material can be used. The hardness and rigidity of the metal material ensure the structural stability and durability of the pressing part 212 in a high-pressure environment, avoiding the influence of material deformation on the normal operation of the equipment.

[0049] The clamping body 10 comprises a pressing plate 110, and the pressing assembly 20 is mounted on the pressing plate 110; and a fixed plate 120 arranged on the side of the pressing plate 110 away from the bipolar plate. This split design makes the installation and maintenance of the pressing assembly 20 more convenient, and also facilitates the adjustment of the relative position between the pressing plate 110 and the fixed plate 120 according to different production needs, improving the production flexibility.

[0050] Specifically, the pressing plate 110 is threadedly connected with the fixed plate 120, and the pressing plate 110 is arranged at the end of the clamping body 10 close to the bipolar plate, and the pressing assembly 20 is arranged in the pressing plate 110, so that in the process of pressing the clamping body 10 on the bipolar plate, the pressing plate 110 presses the bipolar plate, and after the external force disappears, the pressing plate 110 is separated from the bipolar plate under the drive of the pressing part 210.

[0051] As shown in Figure 1 and Figure 2 , the number of the pressing assemblies 20 is multiple, and the multiple pressing assemblies 20 are arranged along the circumference of the clamping body 10 at intervals to avoid the sealing gasket on the bipolar plate and be located outside the periphery of the sealing gasket. When the air tightness test of the finished bipolar plate ends, the pressing part 210 acts on the finished bipolar plate to avoid the phenomenon of slipping and mispositioning of the bipolar plate in the plane of the support structure below, affecting the subsequent steps.

[0052] The utility model also provides a kind of clamping device, including the clamping structure of being arranged on bipolar plate and the support structure of being supported below bipolar plate, clamping structure is the clamping structure described above.

[0053] Optionally, the utility model can also be applied to air tightness detection tooling, and the air tightness detection tooling includes compressor and the clamping device described above, and the compression assembly 20 on the air tightness detection tooling can ensure that finished product bipolar plate is timely stripped from the clamping body 10 after air tightness test, so that the whole continuous line can be orderly operated, and automatic and efficient production is achieved.

[0054] Specifically, during the pressure application process of the press, in order to prevent the risk of crushing the bipolar plate during the process of the compression part 210, the size of the compression part 210 is limited, so that the compression part 210 can be completely retracted into the adjusting cavity 30 during the compression process.

[0055] Specifically, the clamping structure of the utility model is placed on the support structure below the air tightness detection station by the manipulator, and the air tightness test is started, and the working process of the clamping structure is as follows:

[0056] During the air tightness test, the initial state is that the elastic part 220 in the compression assembly 20 is in an extended state, and the compression part 210 extends from the adjusting cavity 30; at this time, the press applies pressure to the clamping body 10, and as the clamping body 10 moves downward, the compression part 212 of the compression part 210 contacts the bipolar plate, and the elastic part 220 is gradually compressed, and the compression part 212 will apply pressure to the finished product bipolar plate due to the compression of the elastic part 220, which plays a role in fixing the position of the bipolar plate.

[0057] After the air tightness test is completed, the press gradually releases pressure, and the compression part 210 will continue to play a fixing role on the bipolar plate due to the compression of the elastic part 220 in the compression assembly 20, and at this time, the bipolar plate is fixed on the support structure below, realizing the separation of the bipolar plate and the clamping body 10; as the clamping body 10 moves upward, the elastic part 220 in the compression assembly 20 gradually recovers to the extended state, and the compression part 210 gradually extends from the adjusting cavity 30 until it returns to the initial state.

[0058] The utility model brings the beneficial effects as follows:

[0059] 1、The clamping structure of the utility model can automatically strip the clamping body 10 on the adhered bipolar plate from the bipolar plate, which improves the pass rate of the bipolar plate to a certain extent.

[0060] 2、The peeling process of the utility model is flexible peeling, which does not have adverse effects on the bipolar plate, and the peeling force can be adjusted by selecting different specifications of elastic members, thereby improving the continuity of the air tightness test production line.

[0061] 3、The compression assembly 20 is correspondingly arranged on the circumference of the clamping body 10 and is arranged at intervals, thereby fixing the position of the bipolar plate, reducing the deviation of the bipolar plate caused by adhesion, and enabling the overall production line to flow in order, thereby achieving automatic and efficient production.

[0062] 4、The clamping structure of the utility model has low manufacturing cost, low manufacturing difficulty, low operation and maintenance cost, and high processing efficiency and processing capacity.

[0063] In summary, the clamping structure described above solves the problem that the sealing gasket on the bipolar plate will be adhered to the upper clamping plate after the bipolar plate is subjected to air tightness detection by arranging the telescopic compression component 210 and the elastic component 220, and improves the detection efficiency of the bipolar plate, reduces the production cost, and reduces the problem of bipolar plate compression waste caused by product adhesion, which has a positive significance for promoting the large-scale industrialization of the bipolar plate of the fuel cell.

[0064] From the above description, it can be seen that the embodiments of the utility model realize the following technical effects:

[0065] The clamping structure of the utility model is arranged on the bipolar plate, and the clamping structure comprises a clamping body 10, the clamping body 10 is arranged on one side of the bipolar plate and is adjustably arranged along the direction close to or away from the bipolar plate; a compression assembly 20 is telescopically arranged on the clamping body 10, so that the compression assembly 20 is gradually retracted until the clamping body 10 is in contact with the bipolar plate during the process that the clamping body 10 is arranged on the bipolar plate, and the compression assembly 20 is gradually extended after the compression force on the clamping body 10 disappears, so as to push the clamping body 10 away from the bipolar plate. In this way, the utility model is provided with a clamping body 10, and the compression assembly 20 with telescopic design is arranged in the clamping body 10, so that the compression assembly 20 can be gradually retracted during the process that the clamping body 10 compresses the bipolar plate, thereby ensuring that stable contact is formed between the bipolar plate and the clamping structure under high pressure. After detection is completed, the compression force disappears, the compression assembly 20 is gradually extended, the clamping body 10 is effectively pushed away from the bipolar plate, adhesion between the bipolar plate and the clamping body 10 is avoided, automatic peeling is realized, the problem that the sealing gasket on the bipolar plate will be adhered to the upper clamping plate in the air tightness test process in the prior art is effectively solved, and the production efficiency and the automation level are significantly improved.

[0066] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0067] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that such techniques, methods, and apparatus are considered part of the art. In all examples shown and discussed herein, any specific values are to be interpreted as merely illustrative and not limiting. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters on the attached drawings illustrate like parts, and therefore, once one part is defined in one drawing, it is not necessary to further discuss it in further drawings.

[0068] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0069] For purposes of the description hereinafter, spatial

[0070] In addition, it should be noted that the use of the terms "first", "second", etc., to describe a component having a defined property is only intended to distinguish between that component and another component having a different defined property, and is not otherwise intended to limit the scope of the present application unless otherwise indicated. Thus, use of the term "first" to describe a component is intended to connote that the component so qualified is not necessarily described first, but is intended to serve its qualification purpose in the context of the specific claim.

[0071] The preferred embodiments of the present application have been described above with the intent to enable those skilled in the art to make and use it. Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the true scope of the present application is defined solely by the metes and bounds of the following claims.

Claims

1. A clamping structure for pressing on a bipolar plate, characterized by, The clamping structure comprises: a clamping body (10) arranged on one side of the bipolar plate and position-adjustably arranged in a direction close to or away from the bipolar plate; a pressing assembly (20) telescopically arranged on the clamping body (10) to gradually retract until the clamping body (10) is in pressing contact with the bipolar plate during pressing of the clamping body (10) on the bipolar plate, and gradually extend to push the clamping body (10) away from the bipolar plate after the pressing force on the clamping body (10) gradually disappears.

2. The clamping structure according to claim 1, characterized in that, The pressing assembly (20) comprises: a pressing component (210) arranged in an adjusting cavity (30) in the clamping body (10), the adjusting cavity (30) extending to the surface of the clamping body (10), and the pressing component (210) telescopically arranged in the adjusting cavity (30) to extend out of or retract into the adjusting cavity (30).

3. The clamping structure according to claim 2, characterized in that The pressing assembly (20) further comprises: a resilient component (220) telescopically arranged in the adjusting cavity (30), one end of the resilient component (220) connected to the pressing component (210) to push the pressing component (210) to extend out of the adjusting cavity (30).

4. The clamping structure according to claim 3, characterized in that The pressing component (210) is provided with a limiting recess hole at one end close to the resilient component (220), and one end of the resilient component (220) is arranged in the limiting recess hole.

5. The clamping structure of claim 2, wherein The pressing component (210) is a stepped columnar body, and the adjusting cavity (30) is a stepped hole matched with the stepped structure.

6. The clamping structure of claim 2, wherein The pressing component (210) comprises a connecting portion (211) and a pressing portion (212) connected to each other, the connecting portion (211) is located on the side of the pressing portion (212) away from the bipolar plate, the outer peripheral surface of the connecting portion (211) protrudes from the outer peripheral surface of the pressing portion (212) to form a first limiting step between the connecting portion (211) and the pressing portion (212), and a second limiting step matched with the limiting step is arranged on the adjusting cavity (30).

7. The clamping structure according to claim 6, wherein a flexible gasket is arranged on the end surface of the pressing portion (212) for pressing the bipolar plate.

8. The clamping structure according to any one of claims 1 to 7, characterized in that, The clamping body (10) comprises: a pressing plate (110) on which the pressing assembly (20) is mounted; a fixing plate (120) arranged on the side of the pressing plate (110) away from the bipolar plate.

9. The clamping structure according to claim 2, wherein the number of the pressing components (210) is multiple, and the multiple pressing components (210) are arranged in a circumferential direction of the clamping body (10) to avoid the sealing gasket on the bipolar plate and be located outside the sealing gasket.

10. A clamping device, characterized in that comprising a clamping structure pressed on a bipolar plate and a support structure supported below the bipolar plate, the clamping structure being the clamping structure of any one of claims 1 to 9.

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