CN217606045U - Pin inserting device and galvanic pile test bench - Google Patents

Abstract

The utility model discloses a contact pin device and pile test rack belongs to fuel cell technical field, wherein, contact pin device includes the apron and connects a plurality of contact pin subassemblies on the apron, the contact pin subassembly includes the contact pin and links firmly the catch bar on the contact pin, and the extending direction of catch bar is alternately with the extending direction of contact pin, the first spout that runs through the both sides face of apron is seted up to the apron, each contact pin subassembly is arranged along first spout in proper order, one or more catch bars slide along the extending direction of first spout and set up in first spout. The utility model provides a contact pin device is convenient for adjust the interval of contact pin, can realize the quick plug of a plurality of contact pins of different heap types, is showing the operating efficiency who improves pile fault detection and pile test rack, guarantees the normal operating of fuel cell pile.

Description

Contact pin device and galvanic pile test bench

Technical Field

The utility model relates to a fuel cell technical field especially relates to a contact pin device and a galvanic pile test rack.

Background

The galvanic pile is the core component of fuel cell system, when galvanic pile performance detection and product were off the production line, need utilize fuel cell pile test bench to carry out performance verification many times to it, when carrying out the monomer voltage and patrolling and examining, need will patrol and examine a contact pin that connects by the manual work and insert the pinhole, consuming time and wasting power. The contact pin is a conductor part connected between the fuel cell voltage inspection plate and the electric pile.

The existing connector structure for inspecting the single voltage of the fuel cell stack is characterized in that a pin inserting device is assembled on the stack in advance and then fixed on an end plate of the stack, and the distance between pins in the structure can not be adjusted. Because reasons such as repair and encapsulation process error are reprocessed many times to the pile trouble for patrol and examine the pinhole interval and hardly guarantee the uniformity, the contact pin device can not integrate and insert the pinhole fast, especially to the pile of different types of pile, each bipolar plate thickness is inconsistent, and the pinhole interval is different, leads to unable rapid Assembly, has reduced detection efficiency.

Therefore, how to realize the quick installation of the contact pin and improve the detection efficiency is a technical problem which needs to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a contact pin device, the device is convenient for adjust the contact pin interval, can realize the quick installation of contact pin, improves detection efficiency. Another object of the utility model is to provide a galvanic pile test rack.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pin device, include the apron and connect in a plurality of contact pin subassemblies on the apron, the contact pin subassembly include the contact pin and link firmly in catch bar on the contact pin, just the extending direction of catch bar with the extending direction of contact pin is alternately, the apron has been seted up and has been run through the first spout of the both sides face of apron, each the contact pin subassembly is followed first spout is arranged in proper order, one or a plurality of the catch bar is followed the extending direction of first spout slide set up in first spout.

Preferably, a limiting structure for preventing the pushing rod from coming out of the first sliding groove is arranged between the pushing rod and the first sliding groove.

Preferably, two ends of the push rod respectively extend out of two sides of the first sliding chute.

Preferably, each contact pin arrange side by side in the same one side of apron, each the catch bar stretch out in the tip of the opposite side of apron is equipped with the anticreep stopper, the width of anticreep stopper is greater than the width of first spout.

Preferably, the plate surface of the cover plate is provided with scale marks arranged along the first sliding groove.

Preferably, the push rod is made of insulating materials.

Preferably, the push rod and the contact pin are connected into a whole through fixing glue.

Preferably, the utility model discloses a pin device still include with the fixed base plate of apron relative position, the face of base plate with the face mutual disposition of apron and reserve between the two has the confession the installation clearance that the contact pin runs through.

Preferably, the base plate is provided with second sliding grooves which penetrate through the plate surfaces on two sides of the base plate, the second sliding grooves are arranged in parallel with the first sliding grooves, and the push rods which are arranged in the first sliding grooves in a sliding mode are in sliding fit with the second sliding grooves.

Preferably, each contact pin is arranged in a mounting gap between the cover plate and the base plate in a penetrating manner, and two ends of each push rod respectively extend out of one side of the first sliding groove and one side of the second sliding groove, which are deviated from each other.

Preferably, the inner side of the first sliding groove and/or the second sliding groove is provided with a sliding rod, the extending direction of the sliding rod is parallel to the extending direction of the first sliding groove, the relative position of the sliding rod and the cover plate is fixed, and each pushing rod is provided with a through hole in sliding fit with the sliding rod.

Preferably, one end or both ends of the first sliding groove extend to a side end face of the cover plate and form a cover plate open slot, and/or one end or both ends of the second sliding groove extend to a side end face of the base plate and form a base plate open slot.

Preferably, the pin inserting device further comprises a positioning plate for fixing the cover plate and the base plate, and side end faces on two sides of an opening groove of the cover plate and/or side end faces on two sides of an opening groove of the base plate are detachably connected with the positioning plate.

Preferably, the cover plate is provided with at least two first sliding chutes which are arranged in parallel, and/or the base plate is provided with at least two second sliding chutes which are arranged in parallel.

The utility model provides a pin device, including the apron with connect a plurality of contact pin subassemblies on the apron, the contact pin subassembly includes the contact pin and links firmly the catch bar on the contact pin, and the extending direction of catch bar is alternately with the extending direction of contact pin, and the first spout that runs through the both sides face of apron is seted up to the apron, and each contact pin subassembly is arranged along first spout in proper order, and one or more catch bars slide along the extending direction of first spout and set up in first spout.

The working principle of the utility model is as follows:

before the test, install the contact pin device on the test bench, according to the interval of pile bipolar plate jack, remove the catch bar along first spout to the interval of adjusting each contact pin corresponds with the jack interval, then, aim at pile bipolar plate jack with the contact pin pointed end of contact pin subassembly, in each contact pin inserts the jack together, accomplished the quick installation of contact pin device promptly.

It is visible, the utility model provides a contact pin device is convenient for adjust the interval of contact pin, can realize the quick plug of a plurality of contact pins of different heap types, is showing the operating efficiency who improves galvanic pile fault detection and galvanic pile test rack, guarantees the normal operating of fuel cell galvanic pile.

The utility model also provides a galvanic pile test rack, include as above pin device. The derivation process of the beneficial effects generated by the pile test bench is substantially similar to the derivation process of the beneficial effects brought by the pin inserting device, and therefore, the description is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a pin inserting device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a pin inserting device according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating an assembly of a pin inserting assembly and a slide rod of a pin inserting apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a cover plate and a base plate according to an embodiment of the present invention;

FIG. 5 is a schematic view of the side end faces of the cover plate and the base plate in an embodiment of the present invention;

fig. 6 is a schematic structural view of a positioning plate according to an embodiment of the present invention.

The meaning of the various reference numerals in figures 1 to 6 is as follows:

1-cover plate, 11-first sliding groove, 12-installation gap, 13-scale mark, 14-first cover plate, 15-second cover plate, 16-first cover plate side end face, 17-second cover plate side end face, 2-base plate, 21-second sliding groove, 22-first base plate, 23-second base plate, 24-first base plate side end face, 25-second base plate side end face, 3-contact pin, 31-insulating layer, 4-push rod, 41-anti-drop limiting block, 5-signal line, 6-circuit board, 7-quick plug, 8-positioning plate, 81-through hole, 82-internal thread blind hole, 83-positioning blind hole, 9-electric pile and 10-slide bar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 6, fig. 1 is a schematic view illustrating a usage status of a pin inserting device according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a pin inserting device according to an embodiment of the present invention; fig. 3 is a schematic view illustrating an assembly of a pin inserting assembly and a slide rod of a pin inserting apparatus according to an embodiment of the present invention; fig. 4 is a schematic structural view of a cover plate and a base plate according to an embodiment of the present invention; FIG. 5 is a schematic view of the side end faces of the cover plate and the base plate in an embodiment of the present invention; fig. 6 is a schematic structural diagram of a positioning plate in an embodiment of the present invention.

The utility model provides a pin device, including apron 1 with connect a plurality of contact pin subassemblies on apron 1, the contact pin subassembly includes contact pin 3 and links firmly catch bar 4 on contact pin 3, and the extending direction of catch bar 4 is alternately with the extending direction of contact pin 3, apron 1 sets up the first spout 11 that runs through apron 1's both sides face, each contact pin subassembly is arranged along first spout 11 in proper order, one or more catch bar 4 slide along the extending direction of first spout 11 and set up in first spout 11. The pushing rod 4 drives the pins 3 fixed by the pushing rod to move together when sliding along the first sliding chute 11, so that the distance between the adjacent pins 3 is changed.

The utility model discloses a theory of operation as follows:

before testing, install the contact pin device on the test bench, according to the interval of pile bipolar plate jack, along first spout 11 removal catch bar 4 to adjust the interval of each contact pin 3 and the jack interval corresponds, then, aim at the bipolar plate jack of pile 9 with the contact pin pointed end of contact pin subassembly, each contact pin 3 together inserts in the jack, has accomplished the quick installation of contact pin device promptly.

It is visible, the utility model provides a contact pin device is convenient for adjust contact pin 3's interval, can realize the quick plug of a plurality of contact pins 3 of different heap types, is showing the operating efficiency who improves pile fault detection and pile test rack, guarantees the normal operating of fuel cell pile.

It should be noted that, in order to avoid the pin assembly from accidentally disengaging from the cover plate 1, a limiting structure for preventing the pushing rod 4 from disengaging from the first sliding slot 11 is preferably disposed between the pushing rod 4 and the first sliding slot 11. Specifically, the limiting structure may be designed in various structural forms, for example, a slot or a protrusion extending along the length direction of the side wall surface of the first sliding groove 1 is provided, and a fixture block or a notch in sliding fit with the pushing rod 4 is designed on the pushing rod 4, so that the pushing rod 4 can only slide back and forth along the first sliding groove 11 and cannot be separated from the first sliding groove 11; or, a limiting block is designed at the end of the pushing rod 4, after the pin assembly and the cover plate 1 are assembled, the limiting block at the end of the pushing rod 4 is clamped at one side of the first sliding groove 11, and the other end of the pushing rod 4 is clamped at the other side of the first sliding groove 11 through the fixedly connected pin 3, so that the pin assembly can only slide along the extending direction of the first sliding groove 11 and cannot be separated from the first sliding groove 11; and so on.

It should be noted that, catch bar 4 and first spout 11 sliding fit, the one end that catch bar 4 is connected with contact pin 3 is located the outside of first spout 11, the other end of catch bar 4 can stretch into in first spout 11 inboard, also can stretch out in the outside of first spout 11, when needing to adjust the contact pin interval, operating personnel can with finger direct movement catch bar 4, also can remove catch bar 4 with the help of other instruments, for the convenience of operating personnel applys thrust to catch bar 4, preferably, the both ends of catch bar 4 in this scheme stretch out in the both sides of first spout 11 respectively, so set up, operating personnel just can conveniently direct action catch bar 4 stretch out in the tip of first spout 11, thereby it together moves to drive contact pin 3 to follow catch bar 4.

Preferably, each contact pin 3 is arranged side by side on the same side of the cover plate 1, the end of each push rod 4 extending out of the other side of the cover plate 1 is provided with an anti-falling limiting block 41, and the width of the anti-falling limiting block 41 is greater than that of the first sliding groove 11. In this scheme, anticreep stopper 41 is as the limit structure who prevents catch bar 4 and break away from first spout 11, first spout 11 can design the open slot structure of tip open type, so that each catch bar 4 slides in first spout 11 from the opening part, thereby realize contact pin subassembly and apron 1's equipment, the after-assembling, 41 joints of anticreep stopper are passed through to the one end of catch bar 4 in one side of first spout 11, the other end of catch bar 4 passes through the opposite side of contact pin 3 joints at first spout 11. In addition, anticreep stopper 41 can also supply the effect end that operating personnel manually passed when catch bar 4 removed, makes things convenient for manual removal catch bar 4.

In order to control and adjust the distance between the pins 3 more precisely, it is preferable that the present solution is provided with scale marks 13 arranged along the first sliding grooves 11 on the surface of the cover plate 1, and the scale marks 13 can precisely indicate the moving distance of the push rods 4 and display the distance between the respective push rods 4, thereby precisely indicating the distance between the respective pins 3. Specifically, the scale mark 13 may be designed as a scale line, or may be designed as a dot-shaped scale mark.

It should be noted that the contact pin 3 is used as a conductive component of the stack test bench, and needs to be in conductive contact with a bipolar plate insertion hole of the stack 9, and may be made of stainless steel or copper alloy, etc., the front end of the contact pin 3 may be designed into a tapered tip shape, and the length of the contact pin 3 may be processed according to the depth of the insertion hole of the stack 9, which is not limited herein. The exposed part of the tail of the contact pin 3 is provided with an insulating layer 31 which can be made of insulating rubber materials, so that the short circuit of the battery caused by the contact between the contact pins 3 is prevented, and the insulating protection effect is achieved. The surface of catch bar 4 needs to be designed for insulating material, and insulating material, such as plastics, pottery etc. also can be adopted to catch bar 4's whole, and preferably, catch bar 4 in this scheme adopts the high strength plastics preparation.

It should be noted that, the push rod 4 and the contact pin 3 are fixedly connected, and the two can be fixedly connected through various structural forms, for example, the two are fixed by fixing glue, or the end of the push rod 4 is closely fitted and fixed with the periphery of the contact pin 3, or the contact pin 3 is partially wound and fixed on the periphery of the push rod 4, and so on. Preferably, catch bar 4 in this scheme is as an organic whole through fixed glue connection with contact pin 3, adopts sticky mode can also avoid changing contact pin 3 or catch bar 4's structure, consequently the processing part of being more convenient for.

It should be noted that, the pin device that forms after apron 1 and the equipment of a plurality of contact pin subassemblies can the modularization install on the pile test bench, and each contact pin 3 among this pin device exposes in the apron 1 outside, in order to stabilize contact pin 3 position, preferably, the utility model discloses a pin device still includes and laps 1 relative position fixed base plate 2, and the face of base plate 2 and the face of apron 1 are arranged relatively and reserve between the two and have the installation clearance 12 that supplies contact pin 3 to run through. So set up, each contact pin 3 just can arrange side by side in installation clearance 12, utilizes apron 1 and base plate 2 to carry out the centre gripping to each contact pin 3, avoids operating personnel accident to touch contact pin 3.

Preferably, base plate 2 offers the second spout 21 that runs through the both sides face of base plate 2, and second spout 21 and first spout 11 parallel arrangement slide setting in catch bar 4 in first spout 11 simultaneously with second spout 21 sliding fit, promptly, can stretch into first spout 11 and second spout 21 respectively by the both ends of the gliding catch bar 4 of first spout 11 relatively. Because operating personnel need drive contact pin 3 shift position through removing catch bar 4 when adjusting the contact pin interval, and only come the adjusting position through the one end of removing catch bar 4 and probably can't accurately drive contact pin 3 and remove, consequently, this scheme stretches into two adjacent spouts respectively with the both ends of catch bar 4 in, operating personnel just so can act on the both ends of catch bar 4 when adjusting the contact pin interval simultaneously, the whole of catch bar 4 just can more conveniently shift position together with the contact pin 3 that links firmly.

Preferably, each contact pin 3 all runs through the installation clearance 12 of arranging between apron 1 and base plate 2, and the both ends of each catch bar 4 stretch out respectively in the one side that first spout 11 and second spout 21 deviate from mutually, so set up, can further make things convenient for manual catch bar 4 that slides of operating personnel, and furtherly, the both ends of catch bar 4 all are provided with an anticreep stopper 41.

In a preferred scheme, as shown in fig. 3, a sliding rod 10 is arranged on the inner side of the first sliding chute 11 and/or the second sliding chute 21, the extending direction of the sliding rod 10 is parallel to the extending direction of the first sliding chute 11, the sliding rod 10 is fixed relative to the cover plate 1, each pushing rod 4 is provided with a through hole in sliding fit with the sliding rod 10, and the sliding rod 10 sequentially penetrates through the through holes of the pushing rods 4, so that the pushing rods 4 can slide along the sliding rods 10, and further the inserting needles 3 are driven to move, and the distance between the inserting needles 3 is rapidly adjusted. A space is reserved between the sliding rod 10 and the inner wall of the sliding chute, so that the pushing rod 4 can move, and the end part of the sliding rod 10 can be fixed on the cover plate 1 or the base plate 2 through other connecting structures (such as a connecting plate, a connecting rod and the like). The sliding rod 10 may also serve as a limit structure for preventing the push bar 4 from being separated from the first slide groove 11 or the second slide groove 21.

Preferably, one end or both ends of the first slide groove 11 extend to the side end face of the cover plate 1 and form a cover plate open groove, and/or one end or both ends of the second slide groove 21 extend to the side end face of the base plate 2 and form a base plate open groove. So set up, when the contact pin subassembly was assembled with apron 1 or base plate 2, just can slide into first spout 11 from the apron open slot, perhaps slide into second spout 21 from the base plate open slot, the back has been assembled, only need to shelter from apron open slot and/or base plate open slot through limit structure such as locating plate or locating lever, avoid catch bar 4 roll-off, the dismantlement process is opposite with the assembly process, therefore, this scheme is through designing first spout 11 and/or second spout 21 into the open slot structure, the installation and the dismantlement process of contact pin subassembly have greatly been made things convenient for.

Referring to fig. 4, in an embodiment, two ends of the first sliding groove 11 respectively extend to two opposite side end surfaces of the cover plate 1, and the cover plate 1 is divided into two parts by the first sliding groove 11, which are a first cover plate 14 and a second cover plate 15 respectively; the two ends of the second sliding groove 21 extend to two opposite side end faces of the base plate 2 respectively, the base plate 2 is divided into two parts by the second sliding groove 21, namely a first base plate 22 and a second base plate 23 respectively, and the first sliding groove 11, the second sliding groove 21 and the installation gap 12 form an open groove structure with a cross-shaped cross section. In order to keep the relative positions of the first cover plate 14 and the second cover plate 15 and the relative positions of the first base plate 22 and the second base plate 23 fixed, this solution may be used to connect and fix the above-mentioned separate parts together by means of plate-like or rod-like connecting members.

It should be noted that, if both ends of the first sliding slot 11 and/or the second sliding slot 21 are closed, the pin inserting device of the present invention can be assembled or disassembled in other ways, for example, the end of the pushing rod 4 can be designed as a detachable structure; or the push rod 4 is installed at an angle suitable for being inserted into the two sliding grooves, and the push rod 4 is rotated to the anti-falling position after being installed in place; and so on.

It should be noted that, the relative positions of the cover plate 1 and the base plate 2 are fixed, and the two may be designed as an integral structure, or may be fixed together through a connecting member. Preferably, the pin inserting device further comprises a positioning plate 8 for fixing the cover plate 1 and the base plate 2, and side end faces on two sides of an opening groove of the cover plate and/or side end faces on two sides of an opening groove of the base plate are detachably connected with the positioning plate 8. As shown in fig. 2, 5 and 6, the side end surface of the cover plate 1 is partitioned into a first cover plate side end surface 16 and a second cover plate side end surface 17 by the cover plate opening groove, the side end surface of the base plate 2 is partitioned into a first base plate side end surface 24 and a second base plate side end surface 25 by the base plate opening groove, the first cover plate side end surface 16 and the second cover plate side end surface 17 are simultaneously connected to the same positioning plate 8, and the first base plate side end surface 24 and the second base plate side end surface 25 are also simultaneously connected to the same positioning plate 8, so that the cover plate 1 and the base plate 2 are connected and fixed, and the cover plate 1 and the other side of the base plate 2 can also be connected and fixed in the same manner. The side end surfaces and the positioning plate 8 can be connected and fixed by using connecting pieces such as bolts and screws, specifically, the first cover plate side end surface 16, the second cover plate side end surface 17, the first base plate side end surface 24 and the second base plate side end surface 25 are provided with blind internal threaded holes 82, the positioning plate 8 is provided with through holes 81 corresponding to the blind internal threaded holes 82 one to one, and during assembly, after each pin inserting assembly penetrates into the corresponding sliding groove, the pin inserting assembly is screwed with each blind internal threaded hole 82 after penetrating through the through hole 81 by using the bolt. In addition, when the sliding grooves are internally designed with the sliding rods 10, the positioning plate 8 can be further provided with positioning blind holes 83 at positions corresponding to the first sliding grooves 11 or the second sliding grooves 21, and the positioning blind holes can be used for positioning the end parts of the sliding rods 10.

Preferably, the cover plate 1 is provided with at least two first sliding grooves 11 arranged in parallel, and/or the base plate 2 is provided with at least two second sliding grooves 21 arranged in parallel. Through setting up many first spouts 11 and/or many second spouts 21, can make same contact pin simultaneously through a plurality of catch bars 4 and spout cooperation, operating personnel just can drive same contact pin 3 through removing a plurality of catch bars 4 and remove when adjusting the contact pin interval, a plurality of catch bars 4 on the same contact pin 3 are arranged along contact pin 3's length direction to take place to deflect when avoiding removing contact pin 3, guarantee the degree of accuracy of adjusting the interval, improve regulation efficiency.

The cover plate 1, the base plate 2, and the positioning plate 8 may be made of high-strength plastic, or may be made of other insulating materials, such as ceramic.

The utility model also provides a galvanic pile test rack, include as above pin device. The derivation process of the beneficial effect generated by the galvanic pile test bench is substantially similar to the derivation process of the beneficial effect brought by the pin inserting device, and therefore, the description is omitted here.

The stack test bench further includes a signal line 5, a circuit board 6, a quick plug 7, and the like. The tail end of each contact pin 3 is connected with a signal wire 5, the other ends of the signal wires 5 are connected to a circuit board 6, and a quick plug 7 is integrally arranged on the circuit board 6 and used for converting a circuit or directly inserting the circuit into a jack seat of a test bench, so that the front end of the PCB is prevented from being damaged, and the PCB is convenient to overhaul.

The utility model discloses following beneficial effect has:

1) The utility model provides a pin device utilizes the catch bar to adjust the position of each contact pin in first spout to can be according to the interval accurate adjustment of pile bipolar plate jack interval, prevent the artifical trouble such as monomer voltage difference that leads to of inserting wrong contact pin order, reduce the manufacturing cost of many sets of frocks, can be used as general type pin device and applied to fuel cell pile test bench;

2) The utility model discloses to the loaded down with trivial details operation mode of single plug of current manual work, simplified the operating procedure of contact pin plug, adopt the integrated mode that is the integral type device of contact pin, can realize the quick plug of contact pin integral type, greatly saved operating time, be showing the operating efficiency who has improved fault detection efficiency and galvanic pile test rack, guaranteed the normal operating of galvanic pile test.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. The utility model provides a pin device, its characterized in that, including the apron with connect in a plurality of contact pin subassemblies on the apron, the contact pin subassembly include the contact pin and link firmly in catch bar on the contact pin, just the extending direction of catch bar with the extending direction of contact pin is alternately, the apron has been seted up and has been run through the first spout of the both sides face of apron, each the contact pin subassembly is followed first spout is arranged in proper order, one or more the catch bar is followed the extending direction of first spout slide set up in first spout.

2. A pin device according to claim 1, wherein a limiting structure is provided between the push rod and the first sliding groove for preventing the push rod from coming out of the first sliding groove.

3. A pin device as recited in claim 1, wherein two ends of the push rod respectively protrude out of two sides of the first sliding slot.

4. A pin device according to claim 3, wherein the pins are arranged side by side on the same side of the cover plate, an anti-falling limiting block is arranged at the end of each push rod extending out of the other side of the cover plate, and the width of the anti-falling limiting block is larger than that of the first chute.

5. The pin device according to claim 1, wherein the plate surface of the cover plate is provided with scale marks arranged along the first sliding groove.

6. A pin device as recited in claim 1, wherein the push rod is an insulating material.

7. A pin device as recited in claim 1, wherein the push rod is integrally connected to the pin by a fixing glue.

8. The pin device according to any one of claims 1 to 7, further comprising a base plate fixed in position relative to the cover plate, wherein a plate surface of the base plate is arranged opposite to a plate surface of the cover plate and a mounting gap for the pin to pass through is reserved between the base plate and the cover plate.

9. The pin device according to claim 8, wherein the base plate is provided with second sliding grooves penetrating through two side plate surfaces of the base plate, the second sliding grooves are arranged in parallel with the first sliding grooves, and a push rod slidably disposed in the first sliding grooves is simultaneously in sliding fit with the second sliding grooves.

10. A pin apparatus according to claim 9, wherein each of the pins penetrates through a mounting gap between the cover plate and the base plate, and both ends of each of the push rods respectively extend out of a side of the first slide groove and a side of the second slide groove facing away from each other.

11. A pin device according to claim 9, wherein a sliding rod is arranged on the inner side of the first sliding groove and/or the second sliding groove, the extending direction of the sliding rod is parallel to the extending direction of the first sliding groove, the relative positions of the sliding rod and the cover plate are fixed, and each pushing rod is provided with a through hole in sliding fit with the sliding rod.

12. A pin device as recited in claim 9, wherein one or both ends of the first runner extend to a side end face of the cover plate and form a cover plate opening slot, and/or one or both ends of the second runner extend to a side end face of the base plate and form a base plate opening slot.

13. A pin device as recited in claim 12, further comprising a positioning plate for securing the cover plate to the base plate, wherein side end surfaces of two sides of an opening slot of the cover plate and/or side end surfaces of two sides of an opening slot of the base plate are detachably connected to the positioning plate.

14. A pin device according to claim 9, wherein the cover plate is provided with at least two first sliding grooves arranged in parallel, and/or the base plate is provided with at least two second sliding grooves arranged in parallel.

15. A stack test rack comprising a pin apparatus according to any one of claims 1 to 14.

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