Stacked screw feeding system for electric pile, screw stacking tool and working method thereof

Abstract

The present application belongs to the technical field of screw storage, in particular to a tool for screw storage, especially to a stacker for electric pile screw feeding system, a screw stacking tool and a working method thereof. The screw stacking tool comprises a supporting bottom plate and an insertion top plate, a plurality of placement holes are formed in the insertion top plate, supporting members are arranged at the corresponding positions of the supporting bottom plate and the placement holes, and auxiliary cleaning members are arranged on the placement holes. When the screw is inserted into the tool for storage, the trigger member is triggered to move, the two cleaning blocks move relatively to clamp the screw, and when the external mechanical arm drives the screw to rotate, the thread cleaning of the screw is completed, so as to avoid the assembly torque anomaly and sealing failure caused by the residual pollutants in the thread.

Description

Technical Field

[0001] This invention belongs to the field of screw storage technology, specifically relating to a tooling for screw storage, and more particularly to a screw feeding system for electric stacks, a screw stacking tooling, and its working method. Background Technology

[0002] During the assembly of the fuel cell stack, the cleanliness of the screw threads directly affects the assembly accuracy of the fuel cell stack.

[0003] In related technologies, screw stacking fixtures generally adopt fixed support structures, which only provide simple support functions. In precision equipment such as fuel cell stacks, metal shavings and other residues are easily attached to the screw threads, which can easily lead to the following problems: During transportation or temporary storage, contaminants can easily become embedded in the thread gaps of the screw. During assembly, manual wiping is required, which affects the fuel cell stack assembly efficiency. Incomplete wiping may lead to abnormal torque and damage to the sealing rings during fuel cell stack assembly, causing the risk of partial discharge.

[0004] Therefore, how to reduce debris in the screw threads is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one embodiment of a screw feeding system for fuel cell stacks, a screw stacking fixture, and a method for operating the same.

[0007] In a first aspect, embodiments of this disclosure provide a screw stacking fixture, including:

[0008] Support base plate;

[0009] Insert the top plate, which is positioned above the supporting bottom plate;

[0010] The insertion top plate has multiple placement holes;

[0011] The supporting base plate is provided with a supporting component at the position corresponding to the placement hole;

[0012] An auxiliary cleaning component is provided on the placement hole;

[0013] The auxiliary cleaning component includes: two cleaning blocks arranged opposite to each other;

[0014] A trigger element is provided on the inner wall of the placement hole;

[0015] When the screw is inserted into the placement hole, the trigger is activated, causing the two cleaning blocks to move relative to each other and clamp the screw. The screw is then rotated by an external robotic arm to clean the threaded portion of the screw. Finally, the screw is inserted into the support to complete the storage.

[0016] In one optional implementation, the cleanup block includes:

[0017] A fixed side plate is fixedly mounted on the insertion top plate;

[0018] Telescopic block, which is inserted into the slot of the fixed side plate;

[0019] The trigger element is located at the bottom of the telescopic block;

[0020] When the screw is inserted into the placement hole, the trigger is activated, causing the two cleaning blocks to move relative to each other, that is, causing the two telescopic blocks to extend out of the slot so that the cleaning layer on the telescopic blocks abuts against the threaded portion of the screw.

[0021] In one alternative embodiment, the trigger is elastically connected to the mounting groove of the placement hole via a reset spring;

[0022] The side wall of the mounting groove is provided with a semi-circular sliding groove;

[0023] The trigger element is slidably connected to the semi-circular groove via a slider;

[0024] The top surface of the trigger is provided with a guide arc groove;

[0025] The bottom of the telescopic block is provided with an insert block that mates with the guide arc groove;

[0026] When the screw is inserted into the placement hole, the extrusion trigger descends along the mounting groove, and the semi-circular slide groove drives the trigger to rotate, causing the guide arc groove to rotate, which in turn drives the telescopic block to move toward the screw.

[0027] In one alternative implementation, the trigger includes:

[0028] lifting board;

[0029] A rotating plate that is slidably mounted on the lifting plate;

[0030] The slider is disposed on the rotating plate;

[0031] The guide groove is formed on the top surface of the rotating plate.

[0032] In one alternative embodiment, a clamping plate is rotatably provided at one end of the rotating plate near the screw;

[0033] The clamping plate is rotatably connected to the rotating plate via a reset torsion spring and a rotating shaft.

[0034] Furthermore, the distance between the two clamping plates is less than the diameter of the screw, while the distance between the two rotating plates is greater than the diameter of the screw.

[0035] In one optional embodiment, the torque of the reset torsion spring is greater than the elastic force of the reset spring;

[0036] That is, when the screw is inserted into the placement hole, the rotating plate is first driven to descend and compress the return spring, and then the clamping plate is squeezed to rotate and compress the return torsion spring.

[0037] In one optional embodiment, a support ring plate is provided on the top of the fixed side plate;

[0038] Two pressure sensors are installed on the top of the support ring plate;

[0039] The screw stacking fixture also includes a control module;

[0040] The control module is used to determine the installation sequence of the spring washer and flat washer on the screw based on the trigger information sent by the two pressure sensors of each auxiliary cleaning component.

[0041] In one optional implementation, the order in which the spring washer and flat washer are fitted onto the screw is as follows:

[0042] After the screw is fully inserted into the placement hole, the washer at the top of the screw contacts the support ring plate;

[0043] If the control module does not receive trigger information from either of the two pressure sensors, it indicates that the spring pad is on the bottom. If the control module receives trigger information from both pressure sensors simultaneously, it indicates that the flat pad is on the bottom.

[0044] Secondly, embodiments of this disclosure also provide a screw feeding system for fuel cell stacks, comprising:

[0045] Feeding mechanism;

[0046] A loading robotic arm is located on the side of the loading mechanism;

[0047] The screw stacking fixture described above is mounted on the feeding mechanism.

[0048] Thirdly, this disclosure also provides a working method using the screw stacking fixture described above, the working method comprising:

[0049] The robotic arm picks up the screw and places it into the placement hole;

[0050] The screw actuates the trigger, causing the two cleaning blocks to move relative to each other;

[0051] The robotic arm rotates the screw, causing the auxiliary cleaning component to clean the threaded portion of the screw;

[0052] The robotic arm inserts the screw into the support to complete the storage.

[0053] The beneficial effects of this invention are that the screw feeding system, screw stacking fixture and its working method for fuel cell stacks, by setting auxiliary cleaning components in the screw stacking fixture, trigger the movement of the trigger component when the screw is inserted into the fixture for storage, causing the two cleaning blocks to move relative to each other and clamp the screw. When the external robotic arm drives the screw to rotate, the screw thread cleaning is completed, thereby avoiding abnormal assembly torque and sealing failure caused by contaminants remaining in the threads.

[0054] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0055] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0056] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the screw stacking fixture provided in an embodiment of the present disclosure;

[0058] Figure 2 This is a schematic diagram of the structure of the screw insertion auxiliary cleaning component provided in an embodiment of this disclosure;

[0059] Figure 3 This is a cross-sectional view of the screw insertion auxiliary cleaning component provided in an embodiment of this disclosure;

[0060] Figure 4 This is a schematic diagram of the structure of the auxiliary cleaning component provided in the embodiments of this disclosure;

[0061] Figure 5 This is a partial structural schematic diagram of the auxiliary cleaning component provided in an embodiment of this disclosure;

[0062] Figure 6 A cross-sectional view of the auxiliary cleaning component provided in an embodiment of this disclosure;

[0063] Figure 7 This is a schematic diagram of the structure of the screw feeding system for fuel cell stacks provided in an embodiment of this disclosure;

[0064] Figure 8 A flowchart illustrating the working method of the screw stacking fixture provided in this embodiment of the disclosure;

[0065] Figure 9 A cross-sectional view from another perspective of the auxiliary cleaning component provided in an embodiment of this disclosure.

[0066] In the diagram: 100, Support plate; 200, Insertion plate; 210, Placement hole; 220, Support component; 300, Auxiliary cleaning component; 310, Cleaning block; 311, Fixed side plate; 311a, Mounting groove; 312, Telescopic block; 320, Trigger; 321, Guide arc groove; 322, Semi-arc slide groove; 323, Lifting plate; 324, Rotating plate; 325, Clamping plate; 3251, Rotating shaft; 3252, Reset torsion spring; 400, Screw; 500, Pressure sensor; 600, Feeding mechanism; 700, Feeding robotic arm. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0069] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0070] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0071] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0072] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0073] Research has found that screw stacking fixtures generally adopt fixed support structures, providing only simple support functions. In precision equipment such as fuel cell stacks, the screw threads are prone to adhering to metal shavings and other residues, which can easily lead to the following problems: During transportation or temporary storage, contaminants can easily become embedded in the thread gaps of the screw. During assembly, manual wiping is required, which affects the fuel cell stack assembly efficiency. Incomplete wiping may lead to abnormal torque and damage to the sealing rings during fuel cell stack assembly, causing the risk of partial discharge.

[0074] Based on the above research, this disclosure provides a screw 400 feeding system for fuel cell stacks, a screw stacking fixture, and its working method. By setting an auxiliary cleaning component 300 in the screw stacking fixture, when the screw 400 is inserted into the fixture for storage, the trigger component 320 is activated to move, causing the two cleaning blocks 310 to move relative to each other and clamp the screw 400. When the external robotic arm drives the screw 400 to rotate, the thread cleaning of the screw 400 is completed, thereby avoiding abnormal assembly torque and sealing failure caused by contaminants remaining in the threads.

[0075] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0076] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0077] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0078] Please see Figure 1 and Figure 2 At least one embodiment also provides a screw stacking fixture, including: a supporting base plate 100; an insertion top plate 200 disposed above the supporting base plate 100; the insertion top plate 200 having a plurality of placement holes 210; a supporting member 220 disposed on the supporting base plate 100 corresponding to the placement holes 210; wherein, an auxiliary cleaning member 300 is disposed on the placement hole 210; the auxiliary cleaning member 300 includes: two cleaning blocks 310 disposed opposite to each other; a trigger member 320 is disposed on the inner wall of the placement hole 210; when the screw 400 is inserted into the placement hole 210, the trigger member 320 is triggered, causing the two cleaning blocks 310 to move relative to each other, clamping the screw 400, and rotating the screw 400 by an external robotic arm to clean the threaded portion of the screw 400, and then inserting the screw 400 into the supporting member 220 to complete the storage.

[0079] By setting an auxiliary cleaning component 300 in the screw stacking fixture, when the screw 400 is inserted into the fixture for storage, the trigger component 320 is activated to move, causing the two cleaning blocks 310 to move relative to each other and clamp the screw 400. When the external robotic arm drives the screw 400 to rotate, the thread cleaning of the screw 400 is completed, thereby avoiding abnormal assembly torque and seal failure caused by contaminants remaining in the threads.

[0080] Please see Figure 3 and Figure 4 The cleaning block 310 includes: a fixed side plate 311, which is fixedly mounted on the insertion top plate 200; a telescopic block 312, which is inserted into the slot of the fixed side plate 311; and a trigger 320 disposed at the bottom of the telescopic block 312. When the screw 400 is inserted into the placement hole 210, the trigger 320 is activated, causing the two cleaning blocks 310 to move relative to each other, that is, causing the two telescopic blocks 312 to extend out of the slot, so that the cleaning layer on the telescopic block 312 abuts against the threaded portion of the screw 400.

[0081] The plug-in cleaning block 310 structure, which uses telescopic block 312 and fixed side plate 311, combined with the mechanical linkage design of trigger 320, realizes automatic clamping of screw 400 when it is inserted. On the one hand, it can adapt to the cleaning needs of screw 400 with different diameters, and on the other hand, it can prevent the screw 400 from tilting when it is inserted.

[0082] Please see Figure 4 and Figure 5 The trigger 320 is elastically connected to the mounting groove 311a of the placement hole 210 via a return spring; a semi-circular sliding groove 322 is provided on the side wall of the mounting groove 311a; the trigger 320 is slidably connected to the semi-circular sliding groove 322 via a slider; a guide arc groove 321 is provided on the top surface of the trigger 320; an insert block that mates with the guide arc groove 321 is provided at the bottom of the telescopic block 312; when the screw 400 is inserted into the placement hole 210, the trigger 320 is pressed down along the mounting groove 311a, and the semi-circular sliding groove 322 drives the trigger 320 to rotate, thereby causing the guide arc groove 321 to rotate, and then driving the telescopic block 312 to move toward the screw 400.

[0083] The semi-circular groove 322 drives the trigger element 320 to rotate, thereby triggering the guide groove 321 to rotate, thus driving the telescopic block 312. It should be noted that the guide groove 321 is eccentrically set, that is, when the guide groove 321 rotates, the distance between the insertion block of the telescopic block 312 and the axis of the screw 400 gets closer and closer.

[0084] Specifically, please refer to Figure 5 and Figure 6 The trigger 320 includes: a lifting plate 323; a rotating plate 324 slidably disposed on the lifting plate 323; a slider disposed on the rotating plate 324; and a guide groove 321 formed on the top surface of the rotating plate 324.

[0085] Please see Figure 5 and Figure 6A clamping plate 325 is rotatably mounted on one end of the rotating plate 324 near the screw 400; the clamping plate 325 is rotatably connected to the rotating plate 324 via a reset torsion spring 3252 and a rotating shaft 3251; and the distance between the two clamping plates 325 is less than the diameter of the screw 400, while the distance between the two rotating plates 324 is greater than the diameter of the screw 400.

[0086] like Figure 9 As shown, specifically, one end of the rotating shaft 3251 is inserted into the rotating plate 324, and the other end is fixedly connected to the clamping plate 325; the rotating shaft 3241 is rotatably connected to the rotating plate 324, and the reset torsion spring 3252 is embedded inside the rotating plate 324, and both ends of the reset torsion spring 3252 are fixedly connected to the rotating shaft 3251 and the rotating plate 324 respectively.

[0087] The screw 400 is further clamped by the clamping plate 325, thereby ensuring the verticality of the screw 400 when it is inserted, so that no additional guide structure is needed between the placement hole 210 and the support 220.

[0088] It should be noted that the torque of the reset torsion spring is greater than the elastic force of the reset spring; that is, when the screw 400 is inserted into the placement hole 210, the rotating plate 324 is first driven to descend and compress the reset spring, and then the clamping plate 325 is squeezed to rotate and compress the reset torsion spring.

[0089] By setting the mechanical matching relationship that the torque of the reset torsion spring is greater than that of the reset spring, interference between the descent of the lifting plate 323 and the clamping of the clamping plate 325 is avoided, ensuring that the cleaning action is executed accurately according to the preset timing.

[0090] It should be noted that a support ring plate is provided on the top of the fixed side plate 311; two pressure sensors 500 are provided on the top of the support ring plate; the screw stacking fixture also includes a control module; the control module is used to determine the installation order of the spring washer and flat washer on the screw 400 based on the trigger information sent by the two pressure sensors 500 of each auxiliary cleaning component 300.

[0091] Specifically, the determination of the insertion order of the spring washer and flat washer on the screw 400 is as follows: after the screw 400 is fully inserted into the placement hole 210, the washer at the top of the screw 400 contacts the support ring plate; if the control module does not receive trigger information from either of the two pressure sensors 500, it indicates that the spring washer is at the bottom; if the control module receives trigger information from both pressure sensors 500 simultaneously, it indicates that the flat washer is at the bottom.

[0092] It should be noted that when the spring pad is detected to be lowered again, an alarm message is sent to switch the positions of the two spring pads and the flat pad before storing the screw 400 again, thereby ensuring the assembly accuracy during the subsequent assembly of the fuel cell stack.

[0093] Please see Figure 7 This disclosure also provides a screw 400 feeding system for an electric stack, including: a feeding mechanism 600; a feeding robotic arm 700 disposed on the side of the feeding mechanism 600; and a screw stacking fixture as described above disposed on the feeding mechanism 600.

[0094] By setting an auxiliary cleaning component 300 in the screw stacking fixture, when the screw 400 is inserted into the fixture for storage, the trigger component 320 is activated to move, causing the two cleaning blocks 310 to move relative to each other and clamp the screw 400. When the external robotic arm drives the screw 400 to rotate, the thread cleaning of the screw 400 is completed, thereby avoiding abnormal assembly torque and seal failure caused by contaminants remaining in the threads.

[0095] Please see Figure 8 At least one embodiment also provides a working method using the screw stacking fixture as described above. By setting an auxiliary cleaning component 300 in the screw stacking fixture, when the screw 400 is inserted into the fixture for storage, the trigger component 320 is activated to move, causing the two cleaning blocks 310 to move relative to each other and clamp the screw 400. When the external robotic arm drives the screw 400 to rotate, the thread cleaning of the screw 400 is completed, thereby avoiding abnormal assembly torque and sealing failure caused by contaminants remaining in the threads.

[0096] Specifically, the working method includes:

[0097] S110: The robotic arm grabs the screw 400 and places it into the placement hole 210;

[0098] S120: The screw 400 actuates the trigger 320, causing the two cleaning blocks 310 to move relative to each other;

[0099] S130: The robotic arm rotates the screw 400, causing the auxiliary cleaning component 300 to clean the threaded portion of the screw 400;

[0100] S140: The robotic arm inserts the screw 400 into the support 220 to complete the storage.

[0101] In summary, this invention provides a screw 400 feeding system for fuel cell stacks, a screw stacking fixture, and its working method. The screw stacking fixture includes: a supporting base plate 100; an insertion top plate 200 positioned above the supporting base plate 100; multiple placement holes 210 on the insertion top plate 200; supporting members 220 at positions corresponding to the placement holes 210 on the supporting base plate 100; auxiliary cleaning members 300 on the placement holes 210; two opposing cleaning blocks 310; and a trigger member 320 on the inner wall of the placement hole 210. When the screw 400 is inserted into the placement hole 210, the trigger member 320 is activated, causing the two cleaning blocks 310 to move relative to each other, clamping the screw 400. An external robotic arm rotates the screw 400 to clean its threaded portion, after which the screw 400 is inserted into the supporting member 220 for storage. By setting an auxiliary cleaning component 300 in the screw stacking fixture, when the screw 400 is inserted into the fixture for storage, the trigger component 320 is activated to move, causing the two cleaning blocks 310 to move relative to each other and clamp the screw 400. When the external robotic arm drives the screw 400 to rotate, the thread cleaning of the screw 400 is completed, thereby avoiding abnormal assembly torque and seal failure caused by contaminants remaining in the threads.

[0102] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0103] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0104] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0105] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0106] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A screw stacking fixture, characterized in that, include: Support plate (100); Insert a top plate (200), which is positioned above the supporting bottom plate (100); The insertion top plate (200) has multiple placement holes (210); The supporting base plate (100) is provided with a supporting member (220) at the corresponding position of the placement hole (210); An auxiliary cleaning component (300) is provided on the placement hole (210). The auxiliary cleaning component (300) includes two cleaning blocks (310) arranged opposite to each other. The inner wall of the placement hole (210) is provided with a trigger (320); The cleanup block (310) includes: A fixed side plate (311) is fixedly mounted on the insertion top plate (200); Telescopic block (312), which is inserted into the slot of the fixed side plate (311); The trigger (320) is disposed at the bottom of the telescopic block (312); The trigger (320) is elastically connected to the mounting groove (311a) of the placement hole (210) via a return spring; The side wall of the mounting groove (311a) is provided with a semi-circular sliding groove (322). The trigger (320) is slidably connected to the semi-circular groove (322) via a slider; The top surface of the trigger (320) is provided with a guide arc groove (321); The bottom of the telescopic block (312) is provided with an insert block that mates with the guide arc groove (321); When the screw (400) is inserted into the placement hole (210), the trigger (320) is activated, and the trigger (320) is pressed down along the mounting groove (311a). The trigger (320) is rotated through the semi-arc slide groove (322), so that the guide arc groove (321) rotates, which in turn drives the two cleaning blocks (310) to move relative to each other, so that the two telescopic blocks (312) extend out of the slot and move toward the screw (400), so that the cleaning layer on the telescopic block (312) abuts against the threaded part of the screw (400) and clamps the screw (400). The screw (400) is rotated by the external mechanical arm. After the threaded part of the screw (400) is cleaned, the screw (400) is inserted into the support (220) to complete the storage.

2. The screw stacking fixture as described in claim 1, characterized in that, The trigger (320) includes: lift plate(323); A rotating plate (324) is slidably mounted on the lifting plate (323); The slider is disposed on the rotating plate (324); The guide groove (321) is formed on the top surface of the rotating plate (324).

3. The screw stacking fixture as described in claim 2, characterized in that, A clamping plate (325) is rotatably provided at one end of the rotating plate (324) near the screw (400); The clamping plate (325) is rotatably connected to the rotating plate (324) via a reset torsion spring and a rotating shaft; Furthermore, the distance between the two clamping plates (325) is less than the diameter of the screw (400), and the distance between the two rotating plates (324) is greater than the diameter of the screw (400).

4. The screw stacking fixture as described in claim 3, characterized in that, The torque of the reset torsion spring is greater than the elastic force of the reset spring; That is, when the screw (400) is inserted into the placement hole (210), the rotating plate (324) is driven to descend and compress the return spring first, and then the clamping plate (325) is squeezed to rotate and compress the return torsion spring.

5. The screw stacking fixture as described in claim 1, characterized in that, A support ring plate is provided on the top of the fixed side plate (311); Two pressure sensors (500) are installed on the top of the support ring plate. The screw stacking fixture also includes a control module; The control module is used to determine the installation sequence of the spring washer and flat washer on the screw (400) based on the trigger information sent by the two pressure sensors (500) of each auxiliary cleaning component (300).

6. The screw stacking fixture as described in claim 5, characterized in that, The order in which the spring washer and flat washer are fitted onto the screw (400) is as follows: After the screw (400) is fully inserted into the placement hole (210), the washer at the top of the screw (400) contacts the support ring plate; If the control module does not receive trigger information from either of the two pressure sensors (500), it indicates that the spring pad is on the bottom. If the control module receives trigger information from both pressure sensors (500) at the same time, it indicates that the flat pad is on the bottom.

7. A screw (400) feeding system for an electric fuel cell stack, characterized in that, include: Feeding mechanism (600); A loading robotic arm (700) is located on the side of the loading mechanism (600); The screw stacking fixture as described in any one of claims 1-6 is disposed on the feeding mechanism (600).

8. A working method using the screw stacking fixture as described in claim 1, characterized in that, The working method includes: The robotic arm grasps the screw (400) and places it into the placement hole (210); The screw (400) actuates the trigger (320), causing the two cleaning blocks (310) to move relative to each other; The robotic arm rotates the screw (400), causing the auxiliary cleaning component (300) to clean the threaded portion of the screw (400); The robotic arm inserts the screw (400) into the support (220) to complete the storage.

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