A leak detection fixture

Abstract

The utility model discloses a leak detection fixture belongs to detection equipment technical field, the utility model discloses a detection platform, four fixed clamping blocks are fixedly installed on the detection platform, and the two opposite settings of four fixed clamping blocks are arranged on the upper surface of detection platform, and the one side of fixed clamping block is equipped with the accommodation groove, and the push board is matched in the accommodation groove, and the one side of push board is provided with three position adjusting spare, and the one side of push board is equipped with the rectangular sliding slot, and the top of push board is equipped with the guide groove, and the inside communication of guide groove and rectangular sliding slot, the utility model discloses the transmission structure that can be independently adjusted position adjusting spare and push board, fixed clamping block are combined, can ensure that single table fixture quick adaptation of many specifications battery package upper cover, solved the problem that the battery package upper cover of different model size is difficult to position detection.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically a leak detection fixture. Background Technology

[0002] Leak detection fixtures are specialized tools used in industrial manufacturing to detect whether a workpiece has a leak. They play a crucial role in ensuring product quality and safety. In the production and manufacturing process of battery packs, the sealing performance of the top cover is one of the key indicators that determines the quality and safety of the battery pack. Therefore, before the top cover and the shell are sealed, a special leak detection fixture is needed to test its airtightness. In the existing technology, leak detection fixtures used to fix the top cover of the battery pack are usually designed for specific models. The positioning posts on the surface of the testing table are fixed during processing, and their positions correspond one-to-one with the positioning grooves on the side of the top cover of the specific model.

[0003] However, with product iteration and model diversification, the external dimensions, number and spatial distribution of side positioning slots of different battery pack cover models often differ. This means that a fixed leak detection fixture can only serve a single model of cover product, making it difficult to perform positioning detection on battery pack covers of different sizes. This requires the production line to be equipped with multiple fixtures, which not only increases equipment procurement and maintenance costs but also occupies valuable production space and brings cumbersome fixture replacement and debugging processes when switching product models. Utility Model Content

[0004] The purpose of this utility model is to provide a leak detection fixture. Through the transmission structure that combines an independently adjustable position adjustment component with a push plate and a fixed clamping block, a single fixture can be quickly adapted to battery pack covers of various specifications, solving the problem of difficulty in positioning and detecting battery pack covers of different models and sizes.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to a leak detection fixture, comprising a testing platform with four fixed clamping blocks fixedly installed on it. The four fixed clamping blocks are arranged in pairs opposite each other on the upper surface of the testing platform. A receiving groove is formed on one side of each fixed clamping block, and a push plate is fitted inside the receiving groove. Three position adjustment components are provided on one side of the push plate, and a rectangular sliding groove is formed on one side of the push plate. A guide groove is formed on the top of the push plate, and the guide groove communicates with the interior of the rectangular sliding groove. The position adjustment components include a movable block that cooperates with the rectangular sliding groove. A guide plate is provided on the top of the movable block, and the guide plate cooperates with the guide groove.

[0007] Furthermore, the fixed clamping block has three through slots on the side away from the receiving slot. The through slots are connected to the receiving slot, and a power rod is fitted inside the through slot. One end of the through slot passes through the through slot into the receiving slot, and one end of the three power rods is fixedly connected to the side of the push plate.

[0008] Furthermore, a battery pack cover is placed on the testing table. The outer surface of the battery pack cover has multiple oblique toothed grooves. Four fixing blocks form a rectangular area on the testing table, and the battery pack cover is placed within the rectangular area.

[0009] Furthermore, the top of the guide plate passes through the guide groove to the top of the push plate. A handle is provided at the top of the guide plate, and a mounting plate is provided on the top side of the guide plate. A threaded hole is provided on the mounting plate, and a locking bolt is fitted inside the threaded hole.

[0010] Furthermore, a slot is provided on the top surface of the push plate, the bottom end of the locking bolt engages with the slot, two limiting blocks are provided on the bottom of the mounting plate, and two limiting grooves are provided on the top of the push plate, with the limiting blocks engaging with the limiting grooves.

[0011] Furthermore, a threaded hole is provided on one side of the movable block, and an assembly bolt is fitted in the threaded hole. A positioning pin is rotatably installed on one end of the assembly bolt, and the positioning pin is fitted with a helical toothed groove.

[0012] Furthermore, a bearing is embedded at one end of the mounting bolt, and the surface of one end of the positioning post mates with the inner ring of the bearing. Two helical gear rings mate with the surface of the positioning post, and both helical gear rings mate with the helical gear slots. Two paddles are provided on the outer surface of the end of the mounting bolt near the positioning post.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model, through the setting of a transmission structure combining independently adjustable position adjustment components with push plates and fixed clamping blocks, allows multiple positioning pins on each fixed clamping block to slide independently and continuously along rectangular grooves on the push plate via corresponding position adjustment components. This precisely matches the positions of the differently distributed oblique toothed slots on the side of the battery pack cover to be tested, thereby ensuring that a single fixture can quickly adapt to battery pack covers of various specifications, improving the applicability of the fixture, significantly reducing the number of fixtures required due to the diversification of product models, effectively reducing equipment costs and space occupation, and greatly simplifying the adjustment process during production changeover, thus improving the overall flexibility and efficiency of the testing line.

[0015] 2. This utility model adopts a modular design with assembly bolts connecting the positioning posts and the movable blocks. The operator only needs to manually rotate the lever on the assembly bolt to quickly remove the excess positioning posts from the movable blocks; conversely, the required positioning posts can also be easily installed back. This avoids mechanical interference or insufficient positioning problems that may occur due to a fixed number of positioning posts, ensuring the compatibility and positioning reliability of the fixture for various types of battery pack covers, further expanding the applicability of the fixture, and making the maintenance and adaptation adjustment of the fixture simpler and more intuitive.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of a leak detection fixture.

[0018] Figure 2 This is a schematic diagram of the leak detection fixture.

[0019] Figure 3 This is a schematic diagram of the top of the leak detection fixture.

[0020] Figure 4 This is a schematic diagram of the installation structure for fixing the clamping block, push plate, and position adjustment component.

[0021] Figure 5 This is a schematic diagram of the installation structure of the position adjustment component and the positioning column.

[0022] In the diagram: 1. Testing platform; 2. Fixing clamp; 201. Receiving groove; 202. Through groove; 3. Power rod; 4. Push plate; 401. Rectangular slide; 402. Guide groove; 403. Slot; 5. Position adjustment component; 501. Movable block; 5011. Threaded hole one; 502. Guide plate; 503. Mounting plate; 5031. Threaded hole two; 504. Locking bolt; 6. Positioning post; 601. Assembly bolt; 7. Battery pack cover; 701. Slanted toothed slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a leak detection fixture, including a testing platform 1, on which four fixing blocks 2 are fixedly installed, the four fixing blocks 2 are arranged opposite each other in pairs on the upper surface of the testing platform 1, a battery pack cover 7 is placed on the testing platform 1, and the outer surface of the battery pack cover 7 is provided with a plurality of oblique toothed grooves 701, the four fixing blocks 2 form a rectangular area on the testing platform 1, and the battery pack cover 7 is placed in the rectangular area, which can facilitate the detection of battery pack covers 7 of different models and sizes.

[0025] A receiving groove 201 is provided on one side of the fixed clamping block 2. A push plate 4 is fitted inside the receiving groove 201. Three position adjustment parts 5 are provided on one side of the push plate 4. A rectangular slide groove 401 is provided on one side of the push plate 4. A guide groove 402 is provided on the top of the push plate 4. The guide groove 402 is connected to the interior of the rectangular slide groove 401. Three through grooves 202 are provided on the side of the fixed clamping block 2 away from the receiving groove 201. The through grooves 202 are connected to the receiving groove 201. A power rod 3 is fitted inside the through groove 202. One end of the through groove 202 passes through the through groove 202 and into the receiving groove 201. One end of the three power rods 3 is fixedly connected to the side of the push plate 4. The ends of the three power rods 3 away from the push plate 4 are all externally connected to electric hydraulic cylinders. The three externally connected electric hydraulic cylinders are controlled by a PLC synchronous controller, which can realize the synchronous horizontal movement of the three power rods 3, thereby facilitating the automatic movement of the push plate 4 and ensuring the positioning and fixing effect of the three positioning posts 6 on the four push plates 4 on the battery pack cover 7.

[0026] The position adjustment component 5 includes a movable block 501, which mates with a rectangular slide groove 401. A guide plate 502 is provided on the top of the movable block 501, which mates with the guide groove 402. The top of the guide plate 502 passes through the guide groove 402 and extends above the push plate 4. A handle is provided at the top of the guide plate 502, which can be easily pushed to slide within the guide groove 402. A mounting plate 503 is provided on the top side of the guide plate 502. A threaded hole 5031 is provided on the mounting plate 503, and a locking bolt 504 is fitted into the threaded hole 5031. The position of the movable block 501 can be adjusted and locked after adjustment. The top surface of the push plate 4 is provided with a slot 403. The bottom end of the locking bolt 504 cooperates with the slot 403, which can make it easy for the bottom end of the locking bolt 504 to abut tightly against the inner wall of the slot 403, ensuring stable locking of the position adjustment part 5. The bottom of the mounting plate 503 is provided with two limiting blocks, and the top of the push plate 4 is provided with two limiting grooves. The limiting blocks cooperate with the limiting grooves to ensure the stability of the guide plate 502 on the push plate 4 during the process of pushing the guide plate 502 to move.

[0027] One side of the movable block 501 has a threaded hole 5011, in which an assembly bolt 601 is fitted. A positioning pin 6 is rotatably mounted on one end of the assembly bolt 601, and a bearing is embedded in the other end of the assembly bolt 601. The surface of one end of the positioning pin 6 mates with the inner ring of the bearing, ensuring the rotational effect between the positioning pin 6 and the assembly bolt 601. This promotes the engagement of the two helical gear rings on the positioning pin 6 with the corresponding helical gear slots 701 on the battery pack cover 7, allowing the positioning pin 6 to rotate into the corresponding helical gear slots 701 through the two helical gear rings. The engagement of the positioning pin 6 with the helical gear slots 701, and the two helical gear rings mating on the surface of the positioning pin 6, both of which engage with the helical gear slots 701, improves the positioning effect of the battery pack cover 7 and ensures the stability of the battery pack cover 7 during testing. Two levers are provided on the outer surface of the end of the assembly bolt 601 near the positioning pin 6, allowing for timely disassembly and assembly of the positioning pin 6 to accommodate the positioning and testing of battery pack covers 7 of different sizes.

[0028] Before using this leak detection fixture to test the airtightness of the battery pack cover 7, the number and distribution of the oblique toothed slots 701 on the side of the battery pack cover 7 to be tested must be adjusted according to the model of the battery pack cover 7 to be tested. The operator first loosens the locking bolts 504 on each position adjustment piece 5 so that its bottom end is disengaged from the slot 403 on the top of the push plate 4. Then, by holding and pushing the handle on the top of the guide plate 502, the operator can drive the movable block 501 below to slide in the rectangular slide groove 401. Since each fixed clamping block 2 is equipped with multiple independent position adjustment pieces 5, the operator can slide them to the precise position corresponding to the oblique toothed slots 701 on the side of the battery pack cover 7 to be tested. After adjustment, tighten the corresponding locking bolts 504 again so that its bottom end is pressed against the slot 403, thereby firmly locking all position adjustment pieces 5 in the new adjusted position.

[0029] After all adjustments are completed, place the battery pack cover 7 within the rectangular area enclosed by the four fixed clamping blocks 2. Activate the external drive device to push all the power rods 3 forward synchronously, causing the four push plates 4 and their pre-positioned positioning pins 6 to move together toward the center of the battery pack cover 7. Finally, the helical gear rings on all the positioning pins 6 will precisely enter the corresponding helical gear slots 701 on the side of the battery pack cover 7, completing the positioning and clamping of the workpiece. After that, the cover can be inflated and leak-tested through the sealing mechanism and air interface on the testing table 1. After the test is completed, the drive device pulls the power rods 3 to reset, causing the push plates 4 and positioning pins 6 to move backward, and the tested workpiece can be removed.

[0030] If the number of oblique toothed slots 701 on the side of the battery pack cover 7 is less than the number of position adjustment parts 5, the operator can manually rotate the lever on the mounting bolt 601 to disengage the mounting bolt 601 from the threaded hole 5011, and completely unscrew and remove the unnecessary positioning pins 6 from the movable block 501, so as to achieve flexible configuration of the number of positioning pins 6 and avoid interference.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A leak detection fixture, comprising a testing platform (1), characterized in that: Four fixing blocks (2) are fixedly installed on the testing table (1), and the four fixing blocks (2) are arranged opposite each other on the upper surface of the testing table (1). The fixed clamp (2) has a receiving groove (201) on one side, and a push plate (4) is fitted inside the receiving groove (201). Three position adjustment parts (5) are provided on one side of the push plate (4). A rectangular slide groove (401) is provided on one side of the push plate (4). A guide groove (402) is provided on the top of the push plate (4). The guide groove (402) communicates with the interior of the rectangular slide groove (401). The position adjustment component (5) includes a movable block (501), which cooperates with a rectangular slide groove (401). A guide plate (502) is provided on the top of the movable block (501), which cooperates with the guide groove (402).

2. The leak detection fixture according to claim 1, characterized in that, The fixed clamp (2) has three through slots (202) on the side away from the receiving slot (201). The through slots (202) are connected to the receiving slot (201). A power rod (3) is fitted in the through slot (202). One end of the through slot (202) passes through the through slot (202) into the receiving slot (201). One end of the three power rods (3) is fixedly connected to the side of the push plate (4).

3. A leak detection fixture according to claim 2, characterized in that, A battery pack cover (7) is placed on the testing platform (1). The outer surface of the battery pack cover (7) is provided with multiple oblique toothed slots (701). The four fixing blocks (2) form a rectangular area on the testing platform (1), and the battery pack cover (7) is placed within the rectangular area.

4. A leak detection fixture according to claim 1, characterized in that, The top of the guide plate (502) passes through the guide groove (402) to the top of the push plate (4). A handle is provided at the top of the guide plate (502). A mounting plate (503) is provided on the top side of the guide plate (502). A threaded hole (5031) is provided on the mounting plate (503). A locking bolt (504) is fitted in the threaded hole (5031).

5. A leak detection fixture according to claim 4, characterized in that, The top surface of the push plate (4) is provided with a slot (403), the bottom end of the locking bolt (504) is engaged with the slot (403), the bottom of the mounting plate (503) is provided with two limiting blocks, the top of the push plate (4) is provided with two limiting grooves, and the limiting blocks are engaged with the limiting grooves.

6. A leak detection fixture according to any one of claims 1-5, characterized in that, The movable block (501) has a threaded hole (5011) on one side, and an assembly bolt (601) is fitted in the threaded hole (5011). A positioning pin (6) is rotatably installed at one end of the assembly bolt (601), and the positioning pin (6) is fitted with a helical toothed groove (701).

7. A leak detection fixture according to claim 6, characterized in that, One end of the mounting bolt (601) is embedded with a bearing, and one end of the positioning post (6) is fitted with the inner ring of the bearing. Two helical gear rings are fitted on the surface of the positioning post (6), and both helical gear rings are fitted with helical gear slots (701). Two paddles are provided on the outer surface of the end of the mounting bolt (601) near the positioning post (6).

Images