CN217981589U

CN217981589U - Test bench for hydrogen fuel cell stack

Info

Publication number: CN217981589U
Application number: CN202222123500.7U
Authority: CN
Inventors: 徐浩淇; 谭皎
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-12-06
Anticipated expiration: 2032-08-12

Abstract

The utility model discloses a test bench for hydrogen fuel cell pile, including the test bench body, the constant head tank has been seted up to the inside of test bench body, be connected with elevating gear in the inner chamber fixed of constant head tank, elevating gear includes biax motor and two threaded rods, and the top of two threaded rods all runs through to the inner chamber of test bench body and has the location shell through bearing frame swing joint. The utility model discloses a set up the cooperation of test rack body, constant head tank, elevating gear, test casing, stop gear, basin, cabinet door, observation window, first motor, transfer line, protecting crust, flabellum, filter screen and spacing ring and used, solved current test rack for the hydrogen fuel cell pile and detected the back to hydrogen fuel cell pile sealing performance, needed artifical water stain to the hydrogen fuel cell pile surface to clean to lead to the problem that hydrogen fuel cell pile test rack detection efficiency is low.

Description

Test bench for hydrogen fuel cell stack

Technical Field

The utility model belongs to the technical field of the hydrogen fuel cell pile, especially, relate to a test bench is used to hydrogen fuel cell pile.

Background

A hydrogen fuel cell is a power generation device that directly converts chemical energy of hydrogen and oxygen into electrical energy. The basic principle is that hydrogen and oxygen are supplied to an anode and a cathode, respectively, by reverse reaction of electrolyzed water, and after hydrogen diffuses out through the anode and reacts with an electrolyte, electrons are emitted to the cathode through an external load.

For example, application No.: CN202110350027.3, the invention provides a hydrogen fuel cell immersion testing device, an air filter is connected to an air input end of a sample placing position through a first pipeline, a first nitrogen storage mechanism is communicated to the first pipeline through a second pipeline, a hydrogen storage mechanism is connected to a hydrogen input end of the sample placing position through a third pipeline, a second nitrogen storage mechanism is communicated to the third pipeline through a fourth pipeline, an explosion-proof environment box is installed at the periphery of the sample placing position, a lifting platform is installed at the inner bottom surface of the explosion-proof environment box, and a data acquisition recorder signal is connected to a sample of the sample placing position.

Based on the search of above-mentioned patent to and combine the test bench among the prior art to discover, above-mentioned test bench when using, though can realize carrying out the leakproofness test to the hydrogen fuel cell pile, current test bench does not possess the hydrogen fuel cell pile surface stoving after the test, leads to the test to accomplish the back and needs the manual work of user to wipe the hydrogen fuel cell pile, thereby leads to the test efficiency of hydrogen fuel cell pile with test regulation to become the step-down.

The utility model provides a test bench for hydrogen fuel cell pile, carry on spacingly fixedly to not unidimensional hydrogen fuel cell pile through stop gear, elevating gear drives the lift of hydrogen fuel cell pile afterwards and gets into the inspection basin, thereby the person of facilitating the use detects the sealing performance of hydrogen fuel cell pile, and can clear away the water stain on hydrogen fuel cell pile surface after detecting through the fan, thereby the artifical time of cleaning hydrogen fuel cell pile surface has been saved, the work efficiency of test bench has been improved.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a test bench for hydrogen fuel cell pile possesses the hydrogen fuel cell pile spacing fixed to unidimensional to can clear away the advantage to the water stain on hydrogen fuel cell pile surface after detecting, solve current test bench for hydrogen fuel cell pile and can't clear away hydrogen fuel cell pile surface water stain after the test, lead to the problem that hydrogen fuel cell pile test bench detection efficiency is low.

The utility model is realized in such a way that a test bench for a hydrogen fuel cell stack comprises a test bench body, wherein a positioning groove is arranged in the test bench body, the inner cavity of the positioning groove is fixedly connected with a lifting device, the lifting device comprises a double-shaft motor and two threaded rods, the tops of the two threaded rods are both penetrated to the inner cavity of the test bench body and are movably connected with a positioning shell through a bearing seat, the bottoms of the two positioning shells are both fixedly connected with the inner wall of the test bench body, the front side and the rear side of the inner cavity of the two positioning shells are both provided with a sliding groove, the surfaces of the two threaded rods are both in threaded connection with a threaded sleeve, one side of the two threaded sleeves opposite to each other is both fixedly connected with a positioning rod, the other side of the two positioning rods is connected with a test shell through a bolt, the bottom of the inner cavity of the test shell is provided with a through hole, the front side of the test shell is fixedly connected with a limiting mechanism, the rear side of the pulling rod is fixedly connected with a fixing rod, the rear side of the fixing rod penetrates to the inner cavity of the test bench body, the front side of the test bench is connected with a first spring, the inner cavity of the test bench body is connected with a movable shaft pin, and the inner cavity of the test bench body is connected with a first spring, the first spring, and the inner cavity of the first spring is connected with a first spring, the first spring, and the first spring, the second spring, and the first spring are connected with a second spring, and the first spring, and the second spring, and the first spring are connected with a second spring, the surface cover of transfer line is equipped with the flabellum, the rear side of test rack body is provided with the filter screen.

As the utility model discloses it is preferred, the top and the bottom of biax motor all with the inner wall fixed connection of constant head tank, the equal fixedly connected with movable rod of output of biax motor both sides, the surface of two movable rods all with the inner wall swing joint of constant head tank, the first bevel gear of the equal fixedly connected with in one side that two movable rods are opposite, the top of two first bevel gear all meshes and is connected with second bevel gear, the equal fixedly connected with bracing piece in bottom of two second bevel gear, the bottom of two bracing pieces is all through the inner wall swing joint of bearing frame with the constant head tank, the top of two second bevel gear all with threaded rod fixed connection.

As the utility model discloses preferred, the front side and the equal fixedly connected with fixed block in rear side of two location shell bottoms, the bottom of fixed block and the inner wall fixed connection of test bench body.

As the utility model discloses preferred, the equal fixedly connected with slider in front side and the rear side of two thread bush, the slider is close to one side of spout and the inner wall swing joint of spout.

As the utility model discloses preferred, the equal fixedly connected with second spring in both sides of spacing shell inner chamber front side, the equal fixedly connected with buffer board in rear side of two second springs.

As the utility model discloses it is preferred, the equal fixedly connected with gag lever post in both sides of pull rod rear side, the rear side of two gag lever posts all runs through to the inner chamber of test casing.

As the utility model discloses preferred, the surface cover of first motor is equipped with the spacing ring, the bottom and the test rack body fixed connection of spacing ring.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up the cooperation of test rack body, constant head tank, elevating gear, test casing, stop gear, basin, cabinet door, observation window, first motor, transfer line, protecting crust, flabellum, filter screen and spacing ring and used, solved current test rack for the hydrogen fuel cell pile and detected the back to hydrogen fuel cell pile sealing performance, needed artifical water stain to the hydrogen fuel cell pile surface to clean to lead to the problem that hydrogen fuel cell pile test rack detection efficiency is low.

2. The utility model discloses a biax motor, the movable rod, first bevel gear, second bevel gear, the bracing piece, the threaded rod, the location shell, the spout, the cooperation of thread bush and locating lever is used, carry out spacing fixed back when stop gear to the hydrogen fuel cell pile, the output through the both sides of biax motor drives two movable rods and rotates, two movable rods drive two first bevel gears when rotatory and rotate, two first bevel gears drive two second bevel gears when rotatory and rotate, two second bevel gears drive two threaded rods when rotatory and rotate, two threaded rods drive two thread bushes when rotatory and move down, two thread bushes drive test casing when moving down and move down, test casing drives hydrogen fuel cell pile move down when moving down, when test casing drives hydrogen fuel cell pile and moves down to the inner chamber of basin, the user observes the hydrogen fuel cell pile through the observation window, water person of facilitating the use through the inner chamber detects hydrogen fuel cell pile sealing performance, through the fixed action to the location shell, the while has prevented that the location shell from taking place the position skew and has used the spout when the basin, the displacement of screw thread bush when having taken place.

3. The utility model discloses a pull rod, the dead lever, spacing shell, first spring, the cooperation of second spring and buffer board is used, when the user need test hydrogen fuel cell pile, the user is through the pulling pull rod forward, the pull rod drives the dead lever and moves forward when moving forward, the dead lever drives spacing shell and moves forward when moving forward, spacing shell drives second spring and buffer board and moves forward when moving forward, and extrude first spring, place the bottom at the test shell inner chamber with hydrogen fuel cell pile afterwards, at this moment, the user loosens the pull rod, kick-back through first spring drives dead lever and spacing shell and moves backward, spacing shell moves backward and carries out the chucking spacingly to hydrogen fuel cell pile, spacing shell uses through the cooperation of second spring and buffer board when moving backward, the cushioning effect to hydrogen fuel cell pile has been played, the hydrogen fuel cell pile damage has been caused when spacing shell is spacing to hydrogen fuel cell pile chucking simultaneously, and can carry out the skew through the not unidimensional hydrogen fuel pile, the pull rod has been prevented to take place when spacing.

4. The utility model discloses a spacing ring has played the limiting displacement to first motor, and first motor takes place the displacement when using simultaneously.

Drawings

Fig. 1 is a schematic structural diagram provided by an embodiment of the present invention;

fig. 2 is a front sectional view of a partial structure provided by the embodiment of the present invention;

fig. 3 is an enlarged view of a portion of the structure at a in fig. 2 according to an embodiment of the present invention;

fig. 4 is a front sectional view of a partial structure provided by the embodiment of the present invention;

fig. 5 is an enlarged view of a portion of the structure shown at B in fig. 4 according to an embodiment of the present invention;

fig. 6 is a right sectional view of a partial structure provided in the embodiment of the present invention.

In the figure: 1. a test bench body; 2. positioning a groove; 3. a lifting device; 301. a double-shaft motor; 302. a movable rod; 303. a first bevel gear; 304. a second bevel gear; 305. a support bar; 306. a threaded rod; 307. a positioning shell; 308. a chute; 309. a threaded sleeve; 310. positioning a rod; 311. a fixed block; 312. a slider; 4. testing the shell; 5. a limiting mechanism; 501. a pull rod; 502. fixing the rod; 503. a limiting shell; 504. a first spring; 505. a second spring; 506. a buffer plate; 507. a limiting rod; 6. a water tank; 7. a cabinet door; 8. an observation window; 9. a first motor; 10. a transmission rod; 11. a protective shell; 12. a fan blade; 13. a filter screen; 14. a limit ring.

Detailed Description

For further understanding the contents, features and effects of the present invention, the following embodiments will be illustrated in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, a testing rack for a hydrogen fuel cell stack provided by an embodiment of the present invention comprises a testing rack body 1, a positioning groove 2 is formed inside the testing rack body 1, an elevating device 3 is fixedly connected to an inner cavity of the positioning groove 2, the elevating device 3 comprises a double-shaft motor 301 and two threaded rods 306, tops of the two threaded rods 306 are both penetrated through an inner cavity of the testing rack body 1 and are movably connected with a positioning shell 307 through a bearing seat, bottoms of the two positioning shells 307 are both fixedly connected with an inner wall of the testing rack body 1, sliding grooves 308 are formed on front sides and rear sides of inner cavities of the two positioning shells 307, surfaces of the two threaded rods 306 are both screwed with threaded sleeves 309, one side opposite to the two threaded sleeves 309 is both fixedly connected with a positioning rod 310, a testing shell 4 is fixedly connected between one side opposite to the two positioning rods 310 through a bolt, a through hole is formed in a bottom of an inner cavity of the testing shell 4, a position limiting mechanism 5 is fixedly connected to a front side of the testing shell 4, the position limiting mechanism 5 comprises a pull rod 501, a rear side of the pull rod 501 is fixedly connected with a fixed with a fixing rod 502, a front end of a spring fixing rack body 503 is connected with a movable shaft pin 10, a front end of a movable spring fixing rack body of a first movable shaft pin fixing rack, a movable shaft pin fixing rack 10 is connected with an observation shaft pin of the testing rack body, a movable shaft pin fixing rack body 9, a movable shaft pin fixing rack body is connected with a movable shaft 10, a movable shaft pin fixing rack body 7 is connected with a movable shaft pin fixing rack body, a movable shaft pin fixing rack body 10, the top of protecting crust 11 and the inner wall fixed connection of test bench body 1, the surface cover of transfer line 10 is equipped with flabellum 12, and the rear side of test bench body 1 is provided with filter screen 13.

Referring to fig. 1, fig. 2, fig. 4 and fig. 5, the top and the bottom of the dual-axis motor 301 are fixedly connected to the inner wall of the positioning slot 2, the output ends of the two sides of the dual-axis motor 301 are fixedly connected to the movable rods 302, the surfaces of the two movable rods 302 are movably connected to the inner wall of the positioning slot 2, the opposite sides of the two movable rods 302 are fixedly connected to the first bevel gears 303, the tops of the two first bevel gears 303 are respectively engaged with the second bevel gears 304, the bottoms of the two second bevel gears 304 are respectively fixedly connected to the supporting rods 305, the bottoms of the two supporting rods 305 are respectively movably connected to the inner wall of the positioning slot 2 through the bearing seats, the tops of the two second bevel gears 304 are respectively fixedly connected to the threaded rods 306, the front sides and the rear sides of the bottoms of the two positioning shells 307 are respectively fixedly connected to the fixed blocks 311, the bottoms of the fixed blocks 311 are fixedly connected to the inner wall of the test bench body 1, the front sides and the rear sides of the two threaded sleeves 309 are respectively fixedly connected to the sliding blocks 312, and one side of the sliding block 312 close to the sliding slot 308 is movably connected to the inner wall of the sliding slot 308.

Adopt above-mentioned scheme: through the cooperation of the double-shaft motor 301, the movable rods 302, the first bevel gears 303, the second bevel gears 304, the support rods 305, the threaded rods 306, the positioning shell 307, the sliding chute 308, the threaded sleeves 309 and the positioning rod 310, after the hydrogen fuel cell stack is limited and fixed by the limiting mechanism 5, the two movable rods 302 are driven to rotate by the output ends on two sides of the double-shaft motor 301, the two movable rods 302 drive the two first bevel gears 303 to rotate when rotating, the two first bevel gears 303 drive the two second bevel gears 304 to rotate when rotating, the two second bevel gears 304 drive the two threaded rods 306 to rotate when rotating, the two threaded rods 306 drive the two threaded sleeves 309 to move downwards when rotating, the two threaded sleeves 309 drive the testing shell 4 to move downwards when moving downwards, the testing shell 4 drives the hydrogen fuel cell stack to move downwards when moving downwards to the inner cavity of the water tank 6, a user can conveniently detect the sealing performance of the hydrogen fuel cell stack by the user, the hydrogen fuel cell stack sealing performance can be convenient for the user by detecting the hydrogen fuel cell stack through the inner cavity of the water tank 6, the sealing shell 307, the hydrogen fuel cell stack can be prevented from being displaced when the hydrogen fuel cell stack is moved downwards to the sliding chute 309 and the sliding chute 308, and the sliding chute 309 is used when the sliding chute is matched and the sliding chute 307, and the sliding chute is used, and the sliding chute 309.

Referring to fig. 1, 2 and 6, the two sides of the front side of the inner cavity of the limiting shell 503 are fixedly connected with second springs 505, the rear sides of the two second springs 505 are fixedly connected with buffer plates 506, the two sides of the rear side of the pull rod 501 are fixedly connected with limiting rods 507, and the rear sides of the two limiting rods 507 penetrate through the inner cavity of the test housing 4.

Adopt above-mentioned scheme: when a user needs to test a hydrogen fuel cell stack, the user pulls the pull rod 501 forwards, the pull rod 501 drives the fixing rod 502 forwards when moving forwards, the fixing rod 502 drives the limiting shell 503 forwards when moving forwards, the limiting shell 503 drives the second spring 505 and the buffer plate 506 forwards when moving forwards, and presses the first spring 504, and then the hydrogen fuel cell stack is placed at the bottom of the inner cavity of the test housing 4, at this time, the user releases the pull rod 501, the fixing rod 502 and the limiting shell 503 are driven to move backwards by the resilience of the first spring 504, the limiting shell 503 backwards moves to clamp and limit the hydrogen fuel cell stack, the limiting shell 503 is used by the cooperation of the second spring 505 and the buffer plate 506 when moving backwards, so that the buffering effect on the hydrogen fuel cell stack is achieved, meanwhile, the hydrogen fuel cell stack is prevented from being damaged by the clamping shell 503 when clamping the hydrogen cell stack, the hydrogen fuel cell stack is prevented from being damaged by the limiting rod 501, and the hydrogen fuel cell stack is prevented from being displaced to the limiting position by the limiting mechanism 507, and the hydrogen fuel cell stack can be prevented from being used when the hydrogen fuel cell stack is not displaced by the limiting rod 501, and the limiting shell 503.

Referring to fig. 1, 2 and 3, a position limiting ring 14 is sleeved on the surface of the first motor 9, and the bottom of the position limiting ring 14 is fixedly connected with the test bench body 1.

Adopt above-mentioned scheme: the limiting ring 14 is used for limiting the first motor 9, and the first motor 9 is displaced when in use.

The utility model discloses a theory of operation:

when the hydrogen fuel cell stack testing device is used, when a user needs to test the hydrogen fuel cell stack, the user pulls the pull rod 501 forwards, the pull rod 501 drives the fixing rod 502 to move forwards when moving forwards, the fixing rod 502 drives the limiting shell 503 to move forwards when moving forwards, the limiting shell 503 drives the second spring 505 and the buffer plate 506 to move forwards and extrude the first spring 504, then the hydrogen fuel cell stack is placed at the bottom of the inner cavity of the testing shell 4, at the moment, the user releases the pull rod 501, the fixing rod 502 and the limiting shell 503 are driven to move backwards through the resilience of the first spring 504, the limiting shell 503 moves backwards to clamp and limit the hydrogen fuel cell stack, the limiting shell 503 is used through the cooperation of the second spring 505 and the buffer plate 506 when moving backwards to play a buffer role in buffering the hydrogen fuel cell stack, and meanwhile, the damage to the hydrogen fuel cell stack caused when the limiting shell 503 clamps and limits the hydrogen fuel cell stack is prevented, the hydrogen fuel cell stacks with different sizes can be limited by the limiting mechanism 5, after the hydrogen fuel cell stacks are limited and fixed by the limiting mechanism 5, the two movable rods 302 are driven to rotate by the output ends at the two sides of the double-shaft motor 301, the two movable rods 302 drive the two first bevel gears 303 to rotate when rotating, the two first bevel gears 303 drive the two second bevel gears 304 to rotate when rotating, the two second bevel gears 304 drive the two threaded rods 306 to rotate when rotating, the two threaded rods 306 drive the two threaded sleeves 309 to move downwards when rotating, the two threaded sleeves 309 drive the testing shell 4 to move downwards when moving downwards, the testing shell 4 drive the hydrogen fuel cell stacks to move downwards when moving downwards, when the testing shell 4 drives the hydrogen fuel cell stacks to move downwards to the inner cavity of the water tank 6, the user observes the hydrogen fuel cell pile through observation window 8, the water person of facilitating the use through 6 inner chambers of basin detects hydrogen fuel cell pile sealing performance, after the detection finishes, drive hydrogen fuel cell pile rebound through elevating gear 3, it rotates to drive transfer line 10 through first motor 9 afterwards, transfer line 10 drives flabellum 12 when rotatory and rotates, water stain to hydrogen fuel cell pile surface is clear away, thereby the manual work time of wiping hydrogen fuel cell pile surface has been saved, the work efficiency of test rack has been improved.

In conclusion: this test bench is used to hydrogen fuel cell pile, through test bench body 1, constant head tank 2, elevating gear 3, test casing 4, stop gear 5, basin 6, cabinet door 7, observation window 8, first motor 9, transfer line 10, protecting crust 11, flabellum 12, filter screen 13 and spacing ring 14's cooperation is used, the current test bench for hydrogen fuel cell pile has been solved and has been put up after detecting hydrogen fuel cell pile sealing performance, need artifically wipe the water stain on hydrogen fuel cell pile surface, thereby lead to the problem that hydrogen fuel cell pile test bench detection efficiency is low.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydrogen fuel cell is test bench for pile, includes test bench body (1), its characterized in that: the testing bench is characterized in that a positioning groove (2) is formed in the testing bench body (1), an inner cavity of the positioning groove (2) is fixedly connected with a lifting device (3), the lifting device (3) comprises a double-shaft motor (301) and two threaded rods (306), the tops of the two threaded rods (306) penetrate through the inner cavity of the testing bench body (1) and are movably connected with positioning shells (307) through bearing seats, the bottoms of the two positioning shells (307) are fixedly connected with the inner wall of the testing bench body (1), sliding grooves (308) are formed in the front sides and the rear sides of the inner cavities of the two positioning shells (307), the surfaces of the two threaded rods (306) are in threaded connection with threaded sleeves (309), positioning rods (310) are fixedly connected to the opposite sides of the two threaded sleeves (309), a testing shell (4) is fixedly connected between the opposite sides of the two positioning rods (310) through bolts, through holes are formed in the bottom of the inner cavity of the testing shell (4), a limiting mechanism (5) is fixedly connected to the front side of the testing shell (4), the limiting mechanism (5) comprises a pull rod (501), a fixing rod (502) is fixedly connected to the rear side of the fixing rod (502), and a first limiting spring (503) penetrates through the testing shell (503), the utility model discloses a test rack, including test rack body (1), basin (6) have been seted up to the front side of first spring (504) and the inner wall fixed connection of test casing (4), basin (6) have been seted up to the bottom of test rack body (1) inner chamber, there is cabinet door (7) front side of test rack body (1) through pivot swing joint, the both sides of test rack body (1) all are provided with observation window (8), the first motor of top fixedly connected with (9) of test rack body (1), the output end fixedly connected with transfer line (10) of first motor (9), the inner chamber swing joint that runs through to test rack body (1) to the bottom of transfer line (10) has protecting crust (11), the top of protecting crust (11) and the inner wall fixed connection of test rack body (1), the surface cover of transfer line (10) is equipped with flabellum (12), the rear side of test rack body (1) is provided with filter screen (13).

2. The test rack for a hydrogen fuel cell stack according to claim 1, wherein: the top and the bottom of biax motor (301) all with the inner wall fixed connection of constant head tank (2), the equal fixedly connected with movable rod (302) of output of biax motor (301) both sides, the surface of two movable rod (302) all with the inner wall swing joint of constant head tank (2), the equal first bevel gear of fixedly connected with (303) in one side that two movable rod (302) are opposite, the top of two first bevel gears (303) all meshes and is connected with second bevel gear (304), the equal fixedly connected with bracing piece (305) in bottom of two second bevel gear (304), the bottom of two bracing pieces (305) all is through the inner wall swing joint of bearing frame with constant head tank (2), the top of two second bevel gear (304) all with threaded rod (306) fixed connection.

3. The test bench for a hydrogen fuel cell stack according to claim 1, wherein: the front side and the rear side of the bottoms of the two positioning shells (307) are fixedly connected with fixing blocks (311), and the bottoms of the fixing blocks (311) are fixedly connected with the inner wall of the test bench body (1).

4. The test rack for a hydrogen fuel cell stack according to claim 1, wherein: the front side and the rear side of the two threaded sleeves (309) are fixedly connected with sliding blocks (312), and one side, close to the sliding groove (308), of each sliding block (312) is movably connected with the inner wall of the sliding groove (308).

5. The test bench for a hydrogen fuel cell stack according to claim 1, wherein: the two sides of the front side of the inner cavity of the limiting shell (503) are fixedly connected with second springs (505), and the rear sides of the two second springs (505) are fixedly connected with buffer plates (506).

6. The test rack for a hydrogen fuel cell stack according to claim 1, wherein: the equal fixedly connected with gag lever post (507) in both sides of pull rod (501) rear side, the rear side of two gag lever posts (507) all runs through to the inner chamber of test casing (4).

7. The test rack for a hydrogen fuel cell stack according to claim 1, wherein: the surface cover of first motor (9) is equipped with spacing ring (14), the bottom and the test bench body (1) fixed connection of spacing ring (14).