CN215680743U

CN215680743U - Fuel cell stack assembly tongs frock

Info

Publication number: CN215680743U
Application number: CN202122059483.0U
Authority: CN
Inventors: 孙晓宁; 杨少生
Original assignee: Shanghai Yunliang New Energy Technology Co ltd
Current assignee: Shanghai Yunliang New Energy Technology Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-28
Anticipated expiration: 2031-08-30

Abstract

The utility model discloses a fuel cell stack assembly gripper tool in the technical field of stack assembly, which comprises a positioning mechanism, wherein the positioning mechanism comprises a tray for bearing a bipolar plate and a membrane electrode and a positioning column for positioning the preassembly of the bipolar plate and the membrane electrode; the grabbing mechanism comprises a claw hand assembly used for grabbing and releasing the electrode plate and the membrane electrode, and the grabbing mechanism is used for moving the bipolar plate and the membrane electrode grabbed by the claw hand assembly to the assembling press. The utility model limits the bipolar plate and the membrane electrode which are pre-assembled on the tray through the positioning column, so that the pre-assembly precision of the bipolar plate and the membrane electrode can be ensured; the pre-assembled bipolar plate and the membrane electrode are grabbed through the claw assembly, and the pre-assembled bipolar plate and the membrane electrode are moved to the assembling press through the grabbing mechanism, so that the bipolar plate and the membrane electrode are quickly assembled on the assembling press, and the production efficiency of the galvanic pile is improved.

Description

Fuel cell stack assembly tongs frock

Technical Field

The utility model relates to the technical field of stack assembly, in particular to a fuel cell stack assembly gripper tool.

Background

According to the difference of power, the electric pile of the fuel cell is formed by alternately stacking dozens of bipolar plates to hundreds of bipolar plates and membrane electrodes. Due to the size and shape particularity of the bipolar plate and the membrane electrode, the bipolar plate is fragile and fragile, and meanwhile, in order to ensure the product performance of the fuel cell stack, the assembly alignment degree of the unit cells needs to be ensured, namely the assembly consistency of the unit cells needs to be ensured, and the assembly error needs to be less than 0.5 mm.

The existing galvanic pile manufacturing mode is manual operation, generally, a single piece is manually grabbed to obtain a bipolar plate or a membrane electrode, and then the grabbed bipolar plate and the membrane electrode are manually and sequentially placed on a galvanic pile assembly press and positioned.

Therefore, a cell stack assembling gripper tool for gripping a plurality of bipolar plates and membrane electrodes at one time is urgently needed in the market.

Disclosure of Invention

In view of the above, the utility model aims to provide a fuel cell stack assembling gripper tool to solve the technical problem that the existing manual assembling stack is low in production efficiency.

The technical scheme adopted by the utility model is as follows: the utility model provides a fuel cell pile assembly tongs frock, includes:

the positioning mechanism comprises a tray for bearing the bipolar plate and the membrane electrode and a positioning column for positioning the preassembly of the bipolar plate and the membrane electrode;

the grabbing mechanism comprises a claw hand assembly used for grabbing and releasing the electrode plate and the membrane electrode, and is movably arranged above the positioning mechanism and used for moving the bipolar plate and the membrane electrode grabbed by the claw hand assembly to an assembly press.

Preferably, the tray is obliquely arranged on the support frame, so that the bipolar plate and the membrane electrode are abutted against the positioning column under the action of gravity.

Preferably, the support frame comprises a bottom plate, long support columns and short support columns, the long support columns are arranged on one side of the bottom plate, and the short support columns are arranged on the other side of the bottom plate, so that the bottom plate is obliquely arranged.

Preferably, the positioning column includes a fixed positioning column, the fixed positioning column is disposed on the first side and the second side of the tray, and the first side is a side of the tray at a low position.

Preferably, the positioning column further comprises a floating positioning column, the floating positioning column is arranged on a third side and a fourth side of the tray, and the third side is a side of the tray at a high position.

Preferably, the floating positioning column comprises a floating column, a floating block, a fixing block, a guide column, a return spring and a spring positioning pin, the floating column is arranged on the floating block, the floating block is movably arranged on the tray, and the floating block is provided with a vertical avoidance groove and a horizontal guide hole; the fixed block comprises a horizontal part and a vertical part, the vertical part is arranged in the vertical avoidance groove and is fixedly connected with the tray, one end of the guide post is provided with a blocking platform, and the other end of the guide post penetrates through the horizontal guide hole and is connected with the vertical part; the reset spring is sleeved on the guide post, one end of the reset spring is connected with the blocking platform, the other end of the reset spring is connected with the floating block, the spring positioning pin can be arranged on the fixing block in a lifting mode, and the floating block is provided with an inclined surface which is abutted and matched with the spring positioning pin and used for enabling the floating block to move towards the bipolar plate and the membrane electrode.

Preferably, the two ends of the grabbing mechanism are provided with transverse positioning plates matched with the fixed positioning columns, and the transverse positioning plates are L-shaped.

Preferably, the number of the claw hand assemblies is 2, and the claw hand assemblies are connected into a whole through a frame;

the claw hand assembly comprises a frame, a first guide rod, a first claw hand plate 213, a first spring, a second spring, a third spring, a fixing plate, a second claw hand plate, a second guide rod, a transmission plate, a chute plate, a first handle and a second handle;

the two ends of the first guide rod are fixedly connected with the frame, the first claw hand plate and the second claw hand plate are connected with the first guide rod in a sliding mode, and claw hands made of high-tenacity glue materials are arranged at the bottom ends of the first claw hand plate and the second claw hand plate; the fixed plate is arranged between the first claw hand plate and the second claw hand plate and is fixedly connected with the first guide rod, the first spring and the second spring are both sleeved on the first guide rod, the first spring is arranged between the first claw hand plate and the fixed plate, and the second spring is arranged between the second claw hand plate and the fixed plate;

the second guide rod is connected with the first claw hand plate in a sliding mode, the third spring is sleeved on the second guide rod, two ends of the third spring are connected with the second guide rod and the first claw hand plate respectively, one end of the transmission plate is rotatably connected with one end of the second guide rod, and two ends of the first handle are fixedly connected with the transmission plate;

the transmission plate is provided with a connecting bulge, the sliding groove plate is provided with a path sliding groove matched with the connecting bulge, and one end of the path sliding groove is connected with a check groove; the second handle is connected with the second claw plate.

Preferably, a positioning long slotted hole is formed in the tray, and a positioning pin which is in inserting fit with the positioning long slotted hole is arranged on the grabbing mechanism; and the tray is provided with an avoiding slotted hole matched with the claw hand assembly.

Preferably, the two ends of the grabbing mechanism are provided with longitudinal positioning rods, and the bottom ends of the longitudinal positioning rods are provided with cushion pads.

The utility model has the beneficial effects that:

1. the positioning column is arranged on the tray, and the bipolar plate and the membrane electrode which are pre-assembled on the tray are limited by the positioning column, so that the pre-assembly precision of the bipolar plate and the membrane electrode can be ensured; the grabbing mechanism is provided with a claw assembly, the pre-assembled bipolar plate and the membrane electrode are grabbed through the claw assembly, and the pre-assembled bipolar plate and the membrane electrode are moved to the assembling press through the grabbing mechanism, so that the bipolar plate and the membrane electrode are quickly assembled on the assembling press, and the production efficiency of the galvanic pile is improved.

2. The utility model realizes the inclined arrangement of the bottom plate by arranging the long support columns on one side of the lower surface of the bottom plate and arranging the short support columns on the other side of the lower surface of the bottom plate, when the bipolar plate and the membrane electrode are pre-assembled, the bipolar plate and the membrane electrode can be abutted against the positioning columns arranged on the tray under the action of gravity, and the positioning of the bipolar plate and the membrane electrode is automatically realized, so that the pre-assembly precision of the bipolar plate and the membrane electrode is ensured.

3. The tray is provided with the fixed positioning column and the floating positioning column, the pre-assembly precision of the bipolar plate and the membrane electrode can be ensured through the positioning effect of the fixed positioning column and the floating positioning column on the bipolar plate and the membrane electrode, and meanwhile, the pre-assembled bipolar plate and the membrane electrode can be conveniently grabbed by the grabbing mechanism through the movement of the floating positioning column.

4. The primary positioning of the grabbing mechanism and the positioning mechanism is realized through the insertion and matching of the positioning pin on the grabbing mechanism and the positioning long slotted hole on the positioning mechanism; the two ends of the grabbing mechanism are provided with the longitudinal positioning rods, and the grabbing mechanism, the pre-assembled bipolar plate and the membrane electrode are positioned in the vertical direction through the abutting of the lower ends of the longitudinal positioning rods and the bipolar plate and the membrane electrode; according to the utility model, the transverse positioning plates are arranged at two ends of the grabbing mechanism, and the grabbing mechanism and the pre-assembled bipolar plate and the membrane electrode are positioned in the horizontal direction through the abutting fit of the transverse positioning plates and the fixed positioning columns, so that the claw assembly can accurately grab the pre-assembled bipolar plate and the membrane electrode.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a schematic structural diagram of a positioning mechanism of the present invention;

FIG. 5 is a side view of the positioning mechanism of the present invention;

FIG. 6 is a perspective view of the gripper assembly of the present invention;

FIG. 7 is a top view of the gripper assembly of the present invention;

FIG. 8 is a front view of the chute plate of the utility model;

fig. 9 is a schematic structural view of the floating positioning pillar of the present invention.

The reference numbers in the figures illustrate:

10-a positioning mechanism; 11-a tray; 12-a support frame;

121-a bottom plate; 122-long support columns; 123-short support columns; 114-positioning slotted holes; 115-avoiding a slotted hole;

20-a gripping mechanism; 21-a gripper assembly; 22-a frame; 23-a locating pin;

211-a bezel; 212-a first guide bar; 213-first gripper plate; 214-a first spring; 215-a second spring; 216-a third spring; 217-fixing plate; 218-a second gripper plate; 219 — second guide bar; 220-a drive plate; 221-a chute plate; 222-a first handle; 223-a second handle; 224-paw hand; 225-a limit post;

2221-path chute; 2222-check groove;

30-bipolar plate and membrane electrode;

40-a positioning column; 41-fixing a positioning column; 42-floating positioning columns;

421-floating column; 422-a slider; 423-fixed block; 424-guide post; 425-a return spring; 426-spring locating pins;

4221-vertical avoidance groove; 4231-horizontal part; 4232-vertical section; 4241-stop table;

50-longitudinal positioning rod;

60-transverse positioning plate.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. 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 addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example, as shown in fig. 1-9, a fuel cell stack assembly gripper assembly for pre-assembly of a plurality of bipolar plates and membrane electrodes 30 and for moving the pre-assembled bipolar plates and membrane electrodes 30 to an assembly press. This frock includes:

the positioning mechanism 10, the positioning mechanism 10 includes a tray 11 for carrying the bipolar plate and the membrane electrode 30 and a positioning column 40 for positioning the preassembly of the bipolar plate and the membrane electrode 30;

and the grabbing mechanism 20 comprises a claw assembly 21 for grabbing and releasing the electrode plate and the membrane electrode 30, and the grabbing mechanism 20 is movably arranged above the positioning mechanism 10 and is used for moving the bipolar plate and the membrane electrode 30 grabbed by the claw assembly 21 to an assembly press.

According to the application, the positioning column 40 is arranged on the tray 11, the bipolar plate and the membrane electrode 30 which are pre-assembled on the tray 11 are limited through the positioning column 40, and the pre-assembly precision of the bipolar plate and the membrane electrode 30 can be guaranteed; the clamping mechanism 20 is provided with the claw assembly 21, the pre-assembled bipolar plate and the membrane electrode 30 are clamped through the claw assembly 21, the pre-assembled bipolar plate and the membrane electrode 30 are moved to the assembling press through the movement of the clamping mechanism 20, the bipolar plate and the membrane electrode 30 are quickly assembled on the assembling press, and the production efficiency of a galvanic pile is improved.

In one embodiment, as shown in fig. 1, the tray 11 is tilted so that the bipolar plate and the membrane electrode 30 are in contact with the positioning posts 40 under the action of gravity. So set up, when carrying out the pre-assembly of bipolar plate prefilming electrode 30 on tray 11, bipolar plate and membrane electrode 30 can be under self action of gravity, automatic with the reference column 40 butt of tray 11 one side, realized bipolar plate and membrane electrode 30's automatic positioning to guarantee bipolar plate and membrane electrode 30's pre-assembly precision.

In one embodiment, as shown in fig. 1, 2, 4 and 5, the tray 11 is disposed on a supporting frame 12, the supporting frame 12 includes a bottom plate 121, long supporting columns 122 and short supporting columns 123, two long supporting columns 122 are disposed on one side of the bottom plate 121, and two short supporting columns 123 are disposed on the other side of the bottom plate 121, so as to incline the bottom plate 121. So set up, the slope setting of tray 11 is realized to accessible support frame 12, and simple structure, low cost.

In one embodiment, as shown in fig. 1-4, the positioning posts 40 include fixed positioning posts 41 and floating positioning posts 42, the fixed positioning posts 41 are disposed on a first side and a second side of the tray 11, the floating positioning posts 42 are disposed on a third side and a fourth side of the tray 11, the first side is a side of the tray 11 at a low position, and the third side is a side of the tray 11 at a high position. With the arrangement, when the bipolar plate pre-membrane electrode 30 is pre-assembled on the tray 11, the pre-assembly precision of the bipolar plate and the membrane electrode 30 can be effectively ensured through the positioning effect of the fixed positioning column 41 and the floating positioning column 42. After the floating positioning column 42 is separated from the bipolar plate and the membrane electrode 30, the assembly precision of the bipolar plate and the membrane electrode 30 can be continuously maintained through the abutting action of the bipolar plate, the membrane electrode 30 and the fixed positioning column 41, and meanwhile, the bipolar plate and the membrane electrode 30 can be conveniently grabbed by the grabbing mechanism.

Preferably, as shown in fig. 9, the floating positioning column 42 includes a floating column 421, a floating block 422, a fixing block 423, a guiding column 424, a return spring 425 and a spring positioning pin 426, the floating column 421 is fixedly disposed on the floating block 422, and the floating block 422 is movably disposed on the tray 11, so that the floating column 421 can approach or separate from the bipolar plate and the membrane electrode 30 under an external force; be equipped with a vertical groove of dodging 4221 and horizontal guiding hole on the slider 422, fixed block 423 includes horizontal part 4231 and vertical part 4232, vertical part 4232 sets up in vertical groove of dodging 4221 and with tray 11 fixed connection, the one end of guide post 424 is equipped with keeps off platform 4241, the other end passes horizontal guiding hole and is connected with vertical part 4232, reset spring 425 overlaps locates on the guide post 424, and reset spring 425's one end is connected with keeping off platform 4241, the other end is connected with slider 422, the setting on fixed block 423 of spring locating pin 426 liftable, be equipped with on the slider 422 with the cooperation of spring locating pin 426 butt and be used for making slider 422 towards the inclined plane that bipolar plate and membrane electrode 30 removed. With such an arrangement, when the bipolar plate and the membrane electrode 30 are preassembled, under the action of the spring positioning pins 426, the floating blocks 422 and the floating columns 421 are close to the bipolar plate and the membrane electrode 30 and abut against the bipolar plate and the membrane electrode 30, so as to complete the positioning of the bipolar plate and the membrane electrode 30. When the pre-assembled bipolar plate and membrane electrode 30 is grabbed, the spring positioning pins 426 are pulled up manually, and the floating blocks 422 and the floating columns 421 are far away from the bipolar plate and membrane electrode 30 under the elastic force of the return springs 425 so as to grab the bipolar plate and membrane electrode 30.

In an embodiment, as shown in fig. 1 and 4, a positioning slot 114 is disposed on the tray 11, and the grabbing mechanism 20 is disposed with a positioning pin 23 engaged with the positioning slot 114. Two ends of the grabbing mechanism 20 are provided with transverse positioning plates 60 matched with the fixed positioning columns 41, and the transverse positioning plates 60 are L-shaped. With such an arrangement, when the grabbing mechanism 20 moves towards the positioning mechanism 10, the positioning pin 23 is in insertion fit with the positioning slot hole 114, and the fixed positioning column 41 is in backstop fit with the transverse positioning plate 60, so that the grabbing mechanism 20 can be quickly positioned in a horizontal plane, and the pre-assembled bipolar plate and the membrane electrode 30 can be conveniently grabbed.

In one embodiment, as shown in fig. 1 and 2, the grasping mechanism 20 is provided with longitudinal positioning rods 50 at both ends thereof, and the lower ends of the longitudinal positioning rods 50 are provided with cushion pads. So set up, at the mechanism decline in-process of snatching, when the blotter of longitudinal positioning pole 50 low side and bipolar plate and membrane electrode 30 butt, accomplish the mechanism of snatching location on vertical direction, reduce the damage to bipolar plate and membrane electrode 30 simultaneously.

In one embodiment, as shown in fig. 1, 3 and 4, the two gripper assemblies 21 are connected together by the frame 22, and the tray 11 is provided with a relief slot 115 for matching with the gripper assemblies 21. Due to the arrangement, the bipolar plate and the membrane electrode 30 can be effectively prevented from falling off in the moving process of the grabbing mechanism by grabbing the bipolar plate and the membrane electrode 30 at different positions through the two claw assemblies 21.

In an embodiment, as shown in fig. 6, 7 and 8, the gripper assembly 21 includes a frame 211, a first guide rod 212, a first gripper plate 213, a first spring 214, a second spring 215, a third spring 216, a fixing plate 217, a second gripper plate 218, a second guide rod 219, a transmission plate 220, a chute plate 221, a first handle 222 and a second handle 223, wherein the frame 211 is rectangular, two first guide rods 212 are arranged in parallel, and two ends of the first guide rods 212 are respectively fixedly connected to the frame 212; the first gripper plate 213 and the second gripper plate 218 are slidably connected to the first guide rod 212, and the bottom ends or opposite sides of the first gripper plate 213 and the second gripper plate 218 are provided with grippers 224 made of acrylic rubber. The fixing plate 217 is disposed between the first gripper plate 213 and the second gripper plate 218, and is fixedly connected to the first guide rod 212, the first spring 214 and the second spring 215 are both sleeved on the first guide rod 212, the first spring 214 is disposed between the first gripper plate 213 and the fixing plate 217, and two ends of the first spring 214 are respectively fixedly connected to the first gripper plate 213 and the fixing plate 217; the second spring 214 is disposed between the second gripper plate 218 and the fixing plate 217, and two ends of the second spring 214 are respectively fixedly connected to the second gripper plate 218 and the fixing plate 217. The number of the second guide rods 219 is two, and the two second guide rods 219 are disposed at the outer sides of the two first guide rods 212 in parallel, the second guide rods 219 are slidably connected to the first claw plate 213, the third spring 216 is sleeved on the second guide rods 219, and two ends of the third spring 216 are connected to the second guide rods 219 and the first claw plate 213 respectively. The number of the driving plates 220 is two, one end of the driving plate 220 is rotatably connected to one end of the second guide rod 219, and both ends of the first handle 222 are fixedly connected to the driving plate 220, respectively. The outer sides of the two transmission plates 220 are provided with connecting protrusions, the sliding groove plate 221 is fixedly arranged on the frame 221, a path sliding groove 2221 matched with the connecting protrusions is arranged on the sliding groove plate 221, and one end of the path sliding groove 2221 is connected with a check groove 2222; the second handle 223 is coupled to the second gripper plate 218. In this arrangement, when the bipolar plate and the membrane electrode 30 are grasped, the first handle 222 is manually pulled, so that the first handle 213 moves along the path slot 2221 of the sliding slot plate 221 and reaches the check slot 2222, so that the claws 224 of the first claw plate 213 and the second claw plate 218 grasp the bipolar plate and the membrane electrode 30. Meanwhile, when the first handle 222 drives the second guide rod 219 to move, the first claw plate 213 moves towards the second claw plate 218 under the elastic force of the third spring 216, so as to adjust the distance between the first claw plate 213 and the second claw plate 218.

Preferably, a stopper column 225 for stopping the first gripper plate 213 and the second gripper plate 218 is provided on the inner side of the frame 211.

The use process of the tool is as follows:

firstly, pre-assembling 20 bipolar plates and a membrane electrode on a tray of a positioning mechanism manually, and then grabbing a plurality of pre-assembled 20 bipolar plates and membrane electrodes by a grabbing mechanism and moving the grabbed bipolar plates and membrane electrodes to a stack assembly press.

Compared with the prior art, the method has the following beneficial technical effects:

the bipolar plate and the membrane electrode that this application can once only snatch 20 pieces of preassemblies and assemble on the pile assembly press, replace the manual monolithic of operating personnel to snatch and place, improve work efficiency, reduce the cost of labor.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a fuel cell pile assembly tongs frock which characterized in that includes:

the positioning mechanism (10), the positioning mechanism (10) comprises a tray (11) for bearing the bipolar plate and the membrane electrode (30) and a positioning column (40) for positioning the preassembly of the bipolar plate and the membrane electrode (30);

the grabbing mechanism (20) comprises a claw hand assembly (21) used for grabbing and releasing the electrode plate and the membrane electrode (30), and the grabbing mechanism (20) is movably arranged above the positioning mechanism (10) and used for moving the bipolar plate and the membrane electrode (30) grabbed by the claw hand assembly (21) to an assembly press.

2. The fuel cell stack assembling gripper tool according to claim 1, wherein the tray (11) is obliquely arranged on the support frame (12) so that the bipolar plate and the membrane electrode (30) are abutted against the positioning column (40) under the action of gravity.

3. The fuel cell stack assembling gripper tool according to claim 2, wherein the support frame (12) comprises a bottom plate (121), long support columns (122) and short support columns (123), two of the long support columns (122) are arranged on one side of the bottom plate (121), and two of the short support columns (123) are arranged on the other side of the bottom plate (121), so that the bottom plate (121) is arranged in an inclined manner.

4. The fuel cell stack assembly gripper tool as claimed in claim 2, wherein the positioning columns (40) comprise fixed positioning columns (41), the fixed positioning columns (41) are arranged on a first side and a second side of the tray (11), and the first side is a side of the tray (11) which is at a low position.

5. The fuel cell stack assembly gripper tool of claim 4, wherein the positioning columns (40) further comprise floating positioning columns (42), the floating positioning columns (42) are arranged on a third side and a fourth side of the tray (11), and the third side is a side of the tray (11) which is at a high position.

6. The fuel cell stack assembling gripper tool according to claim 5, wherein the floating positioning column (42) comprises a floating column (421), a floating block (422), a fixing block (423), a guiding column (424), a return spring (425) and a spring positioning pin (426), the floating column (421) is arranged on the floating block (422), the floating block (422) is movably arranged on the tray (11), and a vertical avoiding groove (4221) and a horizontal guiding hole are formed in the floating block (422); the fixing block (423) comprises a horizontal part (4231) and a vertical part (4232), the vertical part (4232) is arranged in a vertical avoiding groove (4221) and is fixedly connected with the tray (11), one end of the guide column (424) is provided with a blocking table (4241), and the other end of the guide column penetrates through a horizontal guide hole (4222) and is connected with the vertical part (4232); the guide post (424) is sleeved with the reset spring (425), one end of the reset spring (425) is connected with the blocking platform (4241), the other end of the reset spring is connected with the floating block (422), the spring positioning pin (426) is arranged on the fixing block (423) in a lifting mode, and an inclined surface which is matched with the spring positioning pin (426) in an abutting mode and used for enabling the floating block (422) to move towards the bipolar plate and the membrane electrode (30) is arranged on the floating block (422).

7. The fuel cell stack assembling gripper tool according to claim 4, wherein two ends of the gripping mechanism (20) are provided with transverse positioning plates (60) matched with the fixed positioning columns (41), and the transverse positioning plates (60) are L-shaped.

8. The fuel cell stack assembling gripper tool as claimed in claim 1, wherein the number of the gripper assemblies (21) is 2, and the gripper assemblies are connected into a whole through a frame (22);

the claw hand assembly (21) comprises a frame (211), a first guide rod (212), a first claw hand plate (213), a first spring (214), a second spring (215), a third spring (216), a fixing plate (217), a second claw hand plate (218), a second guide rod (219), a transmission plate (220), a sliding groove plate (221), a first handle (222) and a second handle (223);

two ends of the first guide rod (212) are fixedly connected with the frame (211), the first claw plate (213) and the second claw plate (218) are connected with the first guide rod (212) in a sliding mode, and claws (224) made of acrylic rubber are arranged at the bottom ends of the first claw plate (213) and the second claw plate (218); the fixing plate (217) is arranged between the first gripper plate (213) and the second gripper plate (218) and fixedly connected with the first guide rod (212), the first spring (214) and the second spring (215) are sleeved on the first guide rod (212), the first spring (214) is arranged between the first gripper plate (213) and the fixing plate (217), and the second spring (215) is arranged between the second gripper plate (218) and the fixing plate (217);

the second guide rod (219) is connected with the first claw plate (213) in a sliding mode, the third spring (216) is sleeved on the second guide rod (219), two ends of the third spring (216) are connected with the second guide rod (219) and the first claw plate (213) respectively, one end of the transmission plate (220) is rotatably connected with one end of the second guide rod (219), and two ends of the first handle (222) are fixedly connected with the transmission plate (220);

a connecting protrusion is arranged on the transmission plate (220), a path sliding groove (2221) matched with the connecting protrusion is arranged on the sliding groove plate (221), and one end of the path sliding groove (2221) is connected with a check groove (2222); the second handle (223) is coupled to the second gripper plate (218).

9. The fuel cell stack assembling gripper tool according to claim 1, wherein a positioning long slot hole (114) is formed in the tray (11), and a positioning pin (23) which is in inserted fit with the positioning long slot hole (114) is formed in the gripping mechanism (20); and an avoiding slotted hole (115) matched with the claw hand component (21) is arranged on the tray (11).

10. The fuel cell stack assembling gripper tool according to any one of claims 1-9, wherein longitudinal positioning rods (50) are arranged at two ends of the gripping mechanism (20), and a cushion pad is arranged at the bottom end of each longitudinal positioning rod (50).