Clamping and tightening device for fuel cell assembly

Abstract

A clamping and tightening device for fuel cell assembly comprises a mounting platform, a clamping assembly and a tightening assembly, the clamping assembly comprises a clamping fixture rear frame, a clamping fixture front frame and two fixed vertical plates, the two fixed vertical plates are arranged side by side at intervals, a plurality of through holes are formed in any fixed vertical plate, and the width of the through holes is gradually reduced from bottom to top; two clamping rods are arranged in any two opposite through holes in a penetrating mode, the two ends of the two clamping rods are connected through connecting springs, a bolt fixing plate is connected between the middles of the two clamping rods in a clamped mode, and a mounting groove is formed in the bolt fixing plate; lifting pieces are respectively arranged on the outer sides of the two fixed vertical plates, and are used for driving the clamping rods on the corresponding sides to ascend along the height of the through holes to clamp bolts at the bottoms of the single batteries or descend to loosen the bolts at the bottoms of the single batteries; the clamping fixture rear frame and the clamping fixture front frame are connected through a guide rod and are arranged between the two ends of the two fixing vertical plates in a sliding mode respectively. According to the utility model, the battery can be clamped, fixed and tightened synchronously.

Description

Technical Field

[0001] This utility model relates to the field of battery assembly technology and equipment, specifically a clamping and tightening device for fuel cell assembly. Background Technology

[0002] Fuel cells are currently in a phase of rapid development and are widely used in transportation, energy storage, and industrial fields. With the rise of renewable energy and hydrogen energy, manufacturers are improving fuel cell efficiency and reducing costs to meet growing market demand. The introduction of automated production lines and modular designs has improved assembly precision and production efficiency.

[0003] Chinese patent CN220914281U discloses a fuel cell assembly platform, including a base, a lifting platform, a lifting mechanism, a controller, a pressure sensor, and several limiting rods. The limiting rods ensure the consistency of each group of single cells during assembly. The lifting mechanism, in conjunction with the pressure sensor, allows the lifting platform to descend as its load increases, keeping the length of the limiting rods above the single cell at a moderate level, thus improving assembly efficiency.

[0004] However, the aforementioned disclosed technical solutions do not restrict or fix the battery's position. During the tightening process, the battery is not stable enough and is prone to movement, potentially leading to uneven fixing and affecting fuel cell performance. Furthermore, the manual tightening of the battery in these solutions is inefficient, and the process is diagonally sequential, meaning the tightening is not synchronous. This can result in varying tightening torques on each bolt, leading to uneven stress distribution within the battery and impacting fuel cell performance. Utility Model Content

[0005] The present invention aims to provide a clamping and tightening device for assembling fuel cells, which can clamp and fix the battery and tighten the battery simultaneously.

[0006] To solve the above technical problems, the specific solution adopted by this utility model is a clamping and tightening device for fuel cell assembly, including an installation platform, a clamping component and a tightening component. The clamping component is set on the installation platform for clamping and fixing a single cell, and the tightening component is set above the clamping component for synchronously tightening the single cell.

[0007] The clamping assembly includes a clamping fixture rear frame, a clamping fixture front frame, and two fixed vertical plates. The two fixed vertical plates are arranged side by side with intervals. Each fixed vertical plate has multiple through holes along its length, and the width of the through holes gradually decreases from bottom to top. Two clamping rods are inserted into any two opposite through holes. The two ends of the two clamping rods are connected by a connecting spring. A bolt fixing plate is engaged between the middle of the two clamping rods. The bolt fixing plate has mounting grooves for the corresponding bottom bolts of the single battery to pass through. A lifting component is provided on the outer side of each of the two fixed vertical plates. The lifting component is used to drive the corresponding clamping rod to rise along the height of the through hole to clamp the bottom bolt of the single battery, or to lower and loosen the bottom bolt of the single battery.

[0008] The rear frame and front frame of the clamping fixture are slidably mounted between the two ends of the two fixed vertical plates. A guide rod passes through the front frame and the rear frame of the clamping fixture, and a return spring is sleeved on the guide rod. A clamping mating plate is provided at the outer end of the guide rod extending out of the front frame of the clamping fixture. A rotating plate is provided between the clamping mating plate and the front frame of the clamping fixture. By rotating the rotating plate, the front frame and the rear frame of the clamping fixture can be driven to move in opposite directions to clamp the single battery, or to move in opposite directions to release the single battery.

[0009] As another optimized solution for the clamping and tightening device for fuel cell assembly mentioned above: the lifting component includes multiple lifting cylinders, and a lifting plate is provided at the end of the piston rod of the lifting cylinder. The lifting plate is parallel to the fixed vertical plate, and a sliding groove is provided on the lifting plate along its length direction. The clamping rod is slidably disposed in the sliding groove through a connecting slide rod.

[0010] As another optimized solution for the clamping and tightening device for fuel cell assembly mentioned above: the tightening assembly includes a transverse support, a tightening cylinder, a drill bit base plate, and multiple tightening motors. The transverse support is arranged across the fixed vertical plate, the tightening cylinder is slidably arranged on the transverse support, and the piston rod of the tightening cylinder is connected to the drill bit base plate; the tightening motor is arranged on the drill bit base plate, and the shaft of the tightening motor passes through the drill bit base plate and is fitted with a tightening sleeve that is adapted to and clamped to the nut on the top bolt of the single cell.

[0011] As another optimized solution for the clamping and tightening device for fuel cell assembly mentioned above: a slot is provided on the crossbeam of the transverse support along its length direction, and a rack is provided on one side of the transverse support located in the slot; the tightening cylinder is connected to the motor reduction assembly through a connecting block, and a gear for meshing with the rack is provided on the output shaft of the motor reduction assembly.

[0012] As another optimized solution for the clamping and tightening device for fuel cell assembly mentioned above: a sliding groove is provided on the other side of the slot on the transverse support for the connecting block to be inserted and slidably fitted.

[0013] As another optimized solution of the above-mentioned clamping and tightening device for fuel cell assembly: a shearing component for cutting membrane electrodes is provided on one side of the clamping component on the mounting platform. The shearing component includes a shearing base plate, a shearing blade, and multiple clamping parts, which are symmetrically arranged on the shearing base plate for clamping the membrane electrodes.

[0014] As another optimized solution of the above-mentioned clamping and tightening device for fuel cell assembly: the clamping component includes an L-shaped mounting plate fixed to the shearing base plate, the horizontal section of the mounting plate is parallel to the shearing base plate, a clamping screw is screwed onto the horizontal section of the mounting plate, and a clamping block is fixed to the end of the clamping screw.

[0015] As another optimized solution for the clamping and tightening device for fuel cell assembly mentioned above: the shearing base plate is fixed to the mounting platform by four legs, and a waste box for holding the sheared membrane electrode is installed at the bottom of the shearing base plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, two clamping rods pass through opposing through holes on two fixed vertical plates. A bolt fixing plate is provided between the two clamping rods. By creating mounting slots on the bolt fixing plate corresponding to the bottom bolts of the single battery, the bottom bolts of the single battery can be placed in the mounting slots, limiting the movement of the single battery. The two ends of the two clamping rods are connected by connecting springs, and a lifting component located on the outside of the fixed vertical plate can drive the corresponding clamping rods to rise synchronously along the height of the through holes. The distance between the two clamping rods decreases as the width of the through holes gradually decreases during their ascent, thereby clamping the bottom bolts of the single battery on the corresponding bolt fixing plate and reducing shaking and instability when the single battery is tightened. Furthermore, the front and rear frames of the clamping fixture are slidably positioned between two fixed vertical plates, connected by a guide rod. The rotation of a rotating plate located outside the front frame drives the front and rear frames to move synchronously in opposite directions to clamp the sidewall of the single battery, or vice versa, releasing the battery. This further reinforces the single battery, preventing instability that could affect battery performance when tightening the nuts on the top bolts. Additionally, a tightening assembly located above the clamping components simultaneously tightens the nuts on the top bolts of the single battery. Compared to manual tightening, this device ensures that the tightening torque of each top bolt is uniform, maintaining a consistent stress state within the battery and preserving its performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a single battery placed on a clamping assembly in this utility model.

[0020] Reference numerals: 1. Mounting platform; 2. Shearing assembly; 201. Scrap box; 202. Shearing base plate; 203. Clamping screw; 2031. Mounting support plate; 2032. Clamping block; 3. Clamping assembly; 301. Rotating plate; 302. Drive motor; 303. Clamping mating plate; 304. Guide rod; 3041. Return spring; 305. Clamping fixture front frame; 306. Lifting component; 3061. Lifting plate; 3062. Lifting cylinder; 307. Connecting slide rod; 308. Clamping rod, 309, connecting spring, 310, fixed vertical plate, 3101, through hole, 311, bolt fixing plate, 3111, mounting slot, 312, clamping fixture rear frame, 4, tightening assembly, 401, transverse support, 4011, slot, 402, rack, 403, motor reduction assembly, 4031, gear, 404, drill bit base plate, 405, tightening sleeve, 406, tightening cylinder, 5, single battery, 501, single battery top bolt, 502, single battery bottom bolt. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts of this utility model that are not described in detail in the following embodiments, such as the model and specifications of the lifting cylinder, the tightening cylinder, the drive motor and the motor reduction assembly, and the ability of the tightening motor to tighten the nut to the top bolt of the single battery through the tightening sleeve, should all be known or should be known by those skilled in the art.

[0022] like Figure 1-2 As shown, a clamping and tightening device for fuel cell assembly includes an installation platform 1, a clamping assembly 3, a tightening assembly 4, and a shearing assembly 2. The clamping assembly 3, the tightening assembly 4, and the shearing assembly 2 are disposed on the installation platform 1. The shearing assembly 2 is used to cut the uncutable membrane electrode to a suitable size. The clamping assembly 3 is used to clamp and fix the lower end of the single cell 5. The tightening assembly 4 is used to simultaneously tighten the nut on the top bolt 501 of the single cell.

[0023] The clamping assembly 3 and the shearing assembly 2 are arranged side by side along the width direction of the mounting platform 1. The clamping assembly 3 includes two fixed vertical plates 310. The two fixed vertical plates 310 are arranged vertically on the mounting platform 1 and along the width direction of the fixed vertical plates 310. Each of the two fixed vertical plates 310 has three through holes 3101 along its length direction. The through holes 3101 are conical in shape, and their width gradually decreases from bottom to top. The spacing between adjacent through holes 3101 is equal.

[0024] Two through holes 3101 on the two fixed vertical plates 310 are arranged opposite each other, and two clamping rods 308 are inserted between the two opposite through holes 3101. The cross-sectional shape of the clamping rods 308 is square, and the left and right ends of the two clamping rods 308 are respectively inserted through the corresponding through holes 3101. The left and right ends of the two clamping rods 308 located in the corresponding through holes 3101 are connected by connecting springs 309.

[0025] A bolt fixing plate 311 is provided between the two clamping rods 308, and the two ends of the bolt fixing plate 311 are respectively fixed to the corresponding fixed vertical plate 310. The upper side of the three bolt fixing plates 311 is provided with mounting grooves 3111. The position of the mounting grooves 3111 on the bolt fixing plates 311 corresponds to the position of the bottom bolts 502 of the single battery, so that the bottom bolts 502 of the single battery can be inserted into the corresponding mounting grooves 3111, thereby reducing the possibility of movement when the top bolts 501 of the single battery are tightened by rotating the nut.

[0026] The bolt fixing plate 311 has a snap-fit ​​groove (not shown in the figure) in the middle of both long sides, and the snap-fit ​​groove is set along the width direction of the bolt fixing plate 311. The corresponding clamping rod 308 is provided with a connecting guide rod (not shown in the figure) on the outer wall facing the corresponding bolt fixing plate 311. One end of the connecting guide rod is fixed to the middle of the clamping rod 308, and the other end is snapped into the corresponding side snap-fit ​​groove. Moreover, the guide rod can slide along the length direction of the snap-fit ​​groove.

[0027] A set of lifting components 306 is provided on the outer side of each of the two fixed vertical plates 310. Each set of lifting components 306 includes two lifting cylinders 3062 and a lifting plate 3061. The two lifting cylinders 3062 are spaced apart along the length of the corresponding fixed vertical plates 310. The cylinder body of the lifting cylinder 3062 is fixed to the mounting platform 1 by a mounting seat. The piston rod end of the lifting cylinder 3062 is positioned above the clamping rod 308.

[0028] The lifting plate 3061 is parallel to the fixed vertical plate 310. The bottom surface of the lifting plate 3061 is fixed to the piston rods of the two corresponding lifting cylinders 3062. The upper side of the lifting plate 3061 faces the clamping rod 308. A sliding groove is provided in the middle of the upper side of the lifting plate 3061 along its length. The sliding groove is T-shaped. Six connecting slide rods 307 are slidably installed in the sliding groove. The connecting slide rods 307 are T-shaped and fit the sliding groove. The lower horizontal section of the T-shaped connecting slide rod 307 is slidably installed in the sliding groove. The upper vertical section of the connecting slide rod 307 is fixed to the lower side of the end of the six clamping rods 308 that pass through the through hole 3101 on the corresponding side.

[0029] When it is necessary to clamp and fix the single battery 5, the four lifting cylinders 3062 are activated simultaneously. The lifting plate 3061 can gradually rise as the extension rod of the lifting cylinder 3062 extends. The rise of the lifting plate 3061 pushes the six clamping rods 308 to move synchronously along the height direction of the through hole 3101 through the sliding connecting rod. Since the width of the through hole 3101 gradually decreases from bottom to top, the spacing between the six clamping rods 308 gradually tightens as the height of the through hole 3101 rises, until the clamping rods 308 clamp and fix the bottom bolt 502 of the single battery installed in the mounting groove 3111, thereby preventing the single battery from shaking when tightening. When the single battery 5 needs to be removed after tightening, the four lifting cylinders 3062 are closed. The six clamping rods 308 gradually descend and loosen the clamping of the bottom bolt 502 of the single battery as the piston rod of the lifting cylinder 3062 retracts.

[0030] Furthermore, a clamping fixture front frame 305 is slidably arranged between the front ends of the two fixed vertical plates 310 and outside the clamping rod 308, and a clamping fixture front frame 305 is slidably arranged between the rear ends of the two fixed vertical plates 310 and outside the clamping rod 308. Two dovetail-shaped sliders are fixed to the bottom sides of the clamping fixture front frame 305 and the clamping fixture rear frame 312, respectively. Two dovetail-shaped grooves are opened along the width direction on the mounting platform 1 between the two fixed vertical plates 310 for the dovetail-shaped sliders to pass through and slide.

[0031] The front frame 305 and the rear frame 312 of the clamping fixture are connected by two guide rods 304. The two guide rods 304 are fixedly connected to the rear end of the rear frame 312. The front ends of the two guide rods 304 are slidably engaged with the front frame 305 and extend out of the front frame 305. A return spring 3041 is respectively sleeved on the two guide rods 304 between the front frame 305 and the rear frame 312.

[0032] A clamping mating plate 303 parallel to the front frame 305 of the clamping fixture is provided in front of it. Two guide rods 304 pass through the front end of the clamping fixture front frame 305, pass through the clamping mating plate 303, and are fixed by nuts. A drive motor 302 is provided on the mounting platform 1 between the clamping mating plate 303 and the clamping fixture front frame 305. The output shaft of the drive motor 302 is set upward. A rotating plate 301 parallel to the mounting platform 1 is mounted on the output shaft of the drive motor 302. The rotating plate 301 rotates under the drive of the drive motor 302.

[0033] When the rotating plate 301 rotates until its two wide sides abut against the front frame 305 and the clamping mating plate 303 of the clamping fixture, the rotating plate 301 can simultaneously push the front frame 305 of the clamping fixture to slide towards the rear frame 312 of the clamping fixture. At the same time, the rotating plate 301 can push the clamping mating plate 303 to move and drive the rear frame 312 of the clamping fixture to slide towards the front frame 305 of the clamping fixture through the guide rod 304. The relative movement of the front frame 305 and the rear frame 312 of the clamping fixture further clamps and fixes the single battery 5. Correspondingly, when the rotating plate 301 rotates until its long side abuts against the clamping mating plate 303, the front frame 305 and the rear frame 312 of the clamping fixture, which have lost their clamping force, move in opposite directions under the elastic force of the return spring 3041, thus releasing the single battery 5, making it easier to remove the clamped single battery 5.

[0034] The tightening assembly 4 is set on the mounting platform 1 and spans the clamping assembly 3 and the shearing assembly 2. The tightening assembly 4 includes a transverse support 401, a tightening cylinder 406, a motor reduction assembly 403, a drill bit base plate 404, and multiple tightening motors (not shown in the figure). The transverse support 401 is distributed along the length of the mounting platform 1 and spans the fixed vertical plate 310. A slot 4011 is opened on the crossbeam of the transverse support 401 along its length. A rack 402 is set on one side of the transverse support 401 located in the slot 4011. A sliding groove is opened on the other side of the transverse support 401 located in the slot 4011 for the connecting block to be inserted and slidably engaged.

[0035] The tightening cylinder 406 is slidably disposed in the slot 4011. The tightening cylinder 406 is connected to the motor reduction assembly 403 via a connecting block. The output shaft of the motor reduction assembly 403 is equipped with a gear 4031 for meshing with the rack 402. The motor reduction assembly 403 can drive the gear 4031 to rotate. Then, the tightening cylinder 406 slides along the slot 4011 to the top of the clamping assembly 3 to tighten, or moves to the side to facilitate the removal of the single battery 5.

[0036] The piston rod of the tightening cylinder 406 is positioned towards the clamping assembly 3. The drill bit base plate 404 is fixed to the end of the piston rod of the tightening cylinder 406. Multiple tightening motors are mounted on the drill bit base plate 404, and the number and position of the tightening motors correspond to the number and position of the single battery top bolts 501. After the shaft of the tightening motor passes through the drill bit base plate 404, a tightening sleeve 405 is installed. The tightening sleeve 405 is fitted and engaged with the nut on the single battery top bolt 501, so that the tightening motor tightens the nut on the single battery top bolt 501 through the tightening sleeve 405.

[0037] Furthermore, the shearing assembly 2 is located on the right side of the clamping assembly 3. The shearing assembly 2 is used to cut the untreated membrane electrode. The shearing assembly 2 includes a shearing base plate 202, a cutting blade, and four clamping members. The shearing base plate 202 is fixed to the mounting platform 1 by four legs, and the four clamping members are symmetrically arranged on the left and right sides of the shearing base plate 202.

[0038] The clamping component includes an L-shaped mounting plate 2031 fixed to the shearing base plate 202. The horizontal section of the mounting plate 2031 is parallel to the shearing base plate 202. A clamping screw 203 is screwed onto the horizontal section of the mounting plate 2031. A clamping block 2032 is fixed to the end of the clamping screw 203. By rotating the clamping screw 203, the two sides of the membrane electrode can be clamped and fixed. In addition, a waste box 201 for holding the sheared membrane electrode is installed at the bottom of the shearing base plate 202.

Claims

1. A clamping and tightening device for fuel cell assembly, characterized in that: It includes an installation platform (1), a clamping assembly (3) and a tightening assembly (4). The clamping assembly (3) is set on the installation platform (1) to clamp and fix the single battery (5). The tightening assembly (4) is set above the clamping assembly (3) to tighten the single battery (5) synchronously. The clamping assembly (3) includes a clamping fixture rear frame (312), a clamping fixture front frame (305), and two fixed vertical plates (310). The two fixed vertical plates (310) are arranged side by side with intervals. Each fixed vertical plate (310) has multiple through holes (3101) along its length. The width of the through holes (3101) gradually decreases from bottom to top. Two clamping rods (308) are inserted into any two opposite through holes (3101). The two ends of the two clamping rods (308) are connected by a connecting spring (305). 9) Connection: A bolt fixing plate (311) is snapped between the middle of the two clamping rods (308). The bolt fixing plate (311) has an installation groove (3111) for the bottom bolt (502) of the single battery to pass through. A lifting component (306) is provided on the outer side of the two fixed vertical plates (310). The lifting component (306) is used to drive the corresponding clamping rod (308) to rise along the height of the through hole (3101) to clamp the bottom bolt (502) of the single battery, or to fall to loosen the bottom bolt (502) of the single battery. The rear frame (312) and the front frame (305) of the clamping fixture are slidably disposed between the two ends of the two fixed vertical plates (310). A guide rod (304) is provided between the front frame (305) and the rear frame (312) of the clamping fixture. A return spring (3041) is sleeved on the guide rod (304). A clamping mating plate (303) is provided at the outer end of the guide rod (304) extending out of the front frame (305) of the clamping fixture. A rotating plate (301) is provided between the clamping mating plate (303) and the front frame (305) of the clamping fixture. By rotating the rotating plate (301), the front frame (305) and the rear frame (312) of the clamping fixture can be driven to move in opposite directions to clamp the single battery (5), or to move in opposite directions to release the single battery (5).

2. The clamping and tightening device for fuel cell assembly according to claim 1, characterized in that: The lifting component (306) includes multiple lifting cylinders (3062). The piston rod end of the lifting cylinder (3062) is provided with a lifting plate (3061). The lifting plate (3061) is parallel to the fixed vertical plate (310). A sliding groove is provided on the lifting plate (3061) along its length direction. The clamping rod (308) is slidably disposed in the sliding groove through the connecting slide rod (307).

3. The clamping and tightening device for fuel cell assembly according to claim 1, characterized in that: The tightening assembly (4) includes a transverse support (401), a tightening cylinder (406), a drill bit base plate (404), and multiple tightening motors. The transverse support (401) is arranged across the fixed vertical plate (310). The tightening cylinder (406) is slidably arranged on the transverse support (401). The piston rod of the tightening cylinder (406) is connected to the drill bit base plate (404). The tightening motor is arranged on the drill bit base plate (404). The shaft of the tightening motor passes through the drill bit base plate (404) and is fitted with a tightening sleeve (405) that is adapted to and snapped onto the nut on the top bolt (501) of the single battery.

4. The clamping and tightening device for fuel cell assembly according to claim 3, characterized in that: A slot (4011) is provided on the crossbeam of the transverse support (401) along its length direction. A rack (402) is provided on one side of the slot (4011) of the transverse support (401). The tightening cylinder (406) is connected to the motor reduction assembly (403) through a connecting block. A gear (4031) for meshing with the rack (402) is provided on the output shaft of the motor reduction assembly (403).

5. The clamping and tightening device for fuel cell assembly according to claim 4, characterized in that: The transverse support (401) has a groove on the other side of the slot (4011) for the connecting block to be inserted into a sliding fit.

6. The clamping and tightening device for fuel cell assembly according to claim 1, characterized in that: On the mounting platform (1), a shearing assembly (2) for cutting the membrane electrode is provided on one side of the clamping assembly (3). The shearing assembly (2) includes a shearing base plate (202), a shearing blade, and multiple clamping parts. The multiple clamping parts are symmetrically arranged on the shearing base plate (202) for clamping the membrane electrode.

7. A clamping and tightening device for fuel cell assembly according to claim 6, characterized in that: The clamping component includes an L-shaped mounting plate (2031) fixed to the shearing base plate (202). The horizontal section of the mounting plate (2031) is parallel to the shearing base plate (202). A clamping screw (203) is screwed onto the horizontal section of the mounting plate (2031). A clamping block (2032) is fixed to the end of the clamping screw (203).

8. A clamping and tightening device for fuel cell assembly according to claim 6, characterized in that: The shearing base plate (202) is fixed to the mounting platform (1) by four legs, and a waste box (201) for holding the sheared membrane electrodes is installed at the bottom of the shearing base plate (202).

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