A gas tight customized tooling for battery pack upper cover gas tight test equipment

Abstract

The application discloses a kind of airtight customized tool suitable for battery pack upper cover airtight test equipment, comprising: section bar, joint and angle code;Joint is used to connect the end of adjacent multiple section bars coaxially or vertically, joint is inserted with the end surface of section bar, and joint is slidably connected with rack to enable tool to vertically lift;Angle code is used to vertically connect the end of adjacent two section bars, and angle code is fixedly connected with the side wall of section bar.Tool is simply assembled by section bar, joint and angle code, and the length of section bar can be cut or connected according to needs to quickly form the edge frame similar to the flange edge of battery pack upper cover, so that the process of installing auxiliary plate on flange edge is saved, the detection efficiency is improved, and the edge frame bears the pressure of air cylinder by force frame to extrude flange edge, to avoid air cylinder directly acting on battery pack upper cover, leading to battery pack upper cover damage or even scrap.

Description

Technical Field

[0001] This invention relates to the field of power battery testing equipment, and more specifically to a customized airtight tooling for testing the airtightness of a battery pack cover. Background Technology

[0002] If the battery pack cover of a new energy vehicle is not sealed properly, oil and water inside the battery pack may seep into the battery pack. Therefore, it is necessary to conduct an airtightness test on the battery pack cover. Airtightness testing equipment is divided into dedicated type and general type. Among them, the dedicated type of airtightness testing equipment is only suitable for mass production of the same model of battery pack cover.

[0003] The general-purpose airtightness testing equipment is suitable for testing the top covers of battery packs of various types in small batches. The general-purpose airtightness testing equipment uses a telescopic cylinder to press the flange edge of the product, or places an auxiliary plate on the flange edge and then presses the flange edge with a telescopic cylinder to fix the product on the workbench for airtightness testing.

[0004] However, general-purpose airtightness testing equipment may experience displacement of the telescopic cylinder during prolonged use, causing the bottom cylinder to move downwards, resulting in product damage or even scrapping. In addition, an oversized or complex battery pack cover with too many auxiliary plates can also affect testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a customized airtight tooling suitable for an airtightness testing device for battery pack covers, in order to solve the problems that directly using a cylinder to squeeze the battery pack cover can easily cause damage to the battery pack cover or even scrap it, while using an auxiliary plate to connect the cylinder and the battery pack cover can affect the testing efficiency due to the excessive number of auxiliary plates.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A customized airtight fixture for a battery pack cover airtightness testing equipment includes: profiles, connectors, and angle brackets; the connectors are used to coaxially or perpendicularly connect the ends of multiple adjacent profiles, the connectors are inserted into the end faces of the profiles, and the connectors are slidably connected to a frame so that the fixture can be vertically raised and lowered; the angle brackets are used to perpendicularly connect the ends of two adjacent profiles, and the angle brackets are fixedly connected to the side walls of the profiles; the profiles are elongated, and several profiles are connected by the connectors and / or the angle brackets to form a pressure frame and a force-bearing frame, the shape of the pressure frame is the same as the shape of the flange edge of the battery pack cover, the pressure frame is used to press the battery pack cover from top to bottom, the force-bearing frame is installed inside the pressure frame, and the force-bearing frame is used to connect the pressure frame and the cylinder of the airtightness testing equipment.

[0008] Furthermore, the profile has a rectangular cross-section, and each sidewall of the profile has a groove extending along its length. Two opposing pressure strips are formed on the two sides of the groove near the outer surface of the profile, and a first toothed strip is formed on the side of the pressure strip facing inwards. The corner bracket includes a top cover, a floating joint, and a fixed joint. The top cover, the floating joint, and the fixed joint are sequentially connected along a direction perpendicular to one sidewall of the profile. The top cover covers the outer surface of the profile. The floating joint is connected to the top cover by a third bolt, and the top cover and the floating joint are respectively clamped... Holding both sides of the pressure strip, the floating joint has a second toothed edge on the side near the top cover. When the third bolt is tightened, the top cover and the floating joint move closer to each other, and the second toothed edge is inserted into the first toothed edge, so that the floating joint and the profile are in frictional connection. The fixed joint is detachably connected to the profile, the joint, or the cylinder, and the fixed joint is slidably connected to the floating joint. The sliding direction of the floating joint is parallel to the connection direction of the floating joint and the fixed joint. When the third bolt is not tightened, the floating joint and the fixed joint are spliced ​​to form a sliding strip that slides in cooperation with the sliding groove.

[0009] Furthermore, the connector is cubic in shape, and a slot is formed at each corner of the connector around the same center line. A first threaded hole is formed in the slot, and the corner bracket is connected to the first threaded hole by a second bolt.

[0010] Further, the fixed connector includes a plug-in portion and a fitting portion. The fitting portion is obliquely connected to one end of the plug-in portion, and the angle between the plug-in portion and the fitting portion is 45°. The plug-in portion is spliced ​​with the floating connector to form the slide bar. The fitting portion is fitted with the slot. A second through hole is formed on the fitting portion. The second through hole and the first threaded hole are connected by a second bolt. Alternatively, the fixed connector includes a plug-in portion and a fitting portion. The plug-in portion has two parts and is respectively connected to both ends of the fitting portion. The angle between the two plug-in portions is 90°. Each plug-in portion is spliced ​​with one floating connector to form the slide bar. The fitting portion is fitted with the slot. A second through hole is formed on the fitting portion. The second through hole and the first threaded hole are connected by a second bolt.

[0011] Furthermore, a stepped hole is formed on the connector, the stepped hole passing through the center of the connector along the direction of gravity, and the stepped surface of the stepped hole is located at the bottom end of the stepped hole; a stepped shaft is installed on the connector, the stepped shaft includes a coaxial first shaft segment and a second shaft segment, the first shaft segment is inserted into the stepped hole and connected to the stepped hole by a first bolt, the head of the first bolt abuts against the stepped surface, the diameter of the second shaft segment is larger than the diameter of the first shaft segment, and the end face of the second shaft segment abuts against the top surface of the connector.

[0012] On the other hand, the fixed connector includes a plug-in part and a connecting part. The plug-in part has two parts and is respectively connected to the two ends of the connecting part. The included angle between the two plug-in parts is 90°. Each plug-in part is spliced ​​with one floating connector to form the slide bar. The connecting part can slide inside the slide groove.

[0013] On the other hand, the fixed connector includes a plug-in part, a connecting part, and an adapter part. The plug-in part and the adapter part are respectively connected to the two ends of the connecting part. The included angle between the plug-in part and the adapter part is 90°. The plug-in part is spliced ​​with the floating connector to form the slide bar. The connecting part can slide inside the slide groove. A third through hole is formed on the adapter part. The adapter part is connected to the cylinder through an adapter. The adapter is in the shape of an angle steel. A third threaded hole is formed on one side of the adapter. The third threaded hole and the third through hole are connected by a fourth bolt. A connecting hole is formed on the other side of the adapter. The connecting hole is used to connect the cylinder.

[0014] Furthermore, it also includes a gasket installed between the profiles or between the profile and the connector, the gasket having a limiting hole through which the two fixed connectors can pass.

[0015] Furthermore, the upper cover has a first through hole for the third bolt to pass through, and the floating joint has a second threaded hole for threaded connection of the third bolt. The third bolt passes through the first through hole and is threadedly connected to the second threaded hole. The floating joint has a guide post extending toward the fixed joint, and the fixed joint has a guide hole that slides with the guide post. When the third bolt is loosened or tightened, the guide post is always slidably connected to the guide hole. The second threaded hole is coaxial with the guide post and passes through the floating joint and the guide post.

[0016] Furthermore, a spring is installed between the top cover and the floating joint. The side of the floating joint near the top cover has a spring mounting groove recessed toward the fixed joint. The second threaded hole, the guide post, and the spring mounting groove are coaxial. The spring is compressed when the top cover and the floating joint are close to each other.

[0017] Compared with the prior art, this application has the following advantages:

[0018] A custom-designed airtight tooling for battery pack cover airtightness testing equipment is provided. It is simply assembled from profiles, connectors, and corner brackets. The length of the profiles can be cut or spliced ​​as needed to quickly form a pressing frame that resembles the flange edge of the battery pack cover. This eliminates the need to install auxiliary plates on the flange edge, improving testing efficiency. Furthermore, the pressing frame bears the pressure of the cylinder through a force-bearing frame to squeeze the flange edge, thus avoiding direct cylinder action on the battery pack cover, which could damage or even render the battery pack cover unusable. Attached Figure Description

[0019] 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 introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] Figure 1 This is a simplified mechanical diagram from a top view of Embodiment 1 of the present invention;

[0021] Figure 2 This is a simplified mechanical diagram from the main viewpoint of Embodiment 1 of the present invention;

[0022] Figure 3 This is a perspective view of the right-angle connector of Embodiment 1 of the present invention;

[0023] Figure 4 This is an assembly diagram of the right-angle connector according to Embodiment 1 of the present invention;

[0024] Figure 5 This is a side view of the right-angle connector of Embodiment 1 of the present invention;

[0025] Figure 6 for Figure 5 A cross-sectional view along the AA direction;

[0026] Figure 7 for Figure 5 A cross-sectional view along the BB direction;

[0027] Figure 8This is an axial view of the connection structure of the profile and corner bracket in one working condition of Embodiment 1 of the present invention. The third bolt on the corner bracket is in a loosened state.

[0028] Figure 9 for Figure 8 A cross-sectional view along the CC direction;

[0029] Figure 10 This is an axial view of the connection structure of the profile and corner bracket in another working condition according to Embodiment 1 of the present invention. The third bolt on the corner bracket is in a tightened state.

[0030] Figure 11 for Figure 10 A cross-sectional view along the DD direction;

[0031] Figure 12 for Figure 10 A cross-sectional view along the EE direction;

[0032] Figure 13 This is an assembly diagram of the corner bracket from one perspective of Embodiment 1 of the present invention;

[0033] Figure 14 This is an assembly diagram of the corner bracket from another perspective of Embodiment 1 of the present invention;

[0034] Figure 15 This is a perspective view of the T-joint of Embodiment 1 of the present invention;

[0035] Figure 16 This is a perspective view of the cross joint of Embodiment 1 of the present invention;

[0036] Figure 17 This is a perspective view of Embodiment 2 of the present invention;

[0037] Figure 18 This is an assembly diagram of Embodiment 2 of the present invention;

[0038] Figure 19 This is a perspective view of Embodiment 3 of the present invention;

[0039] Figure 20 This is an assembly diagram of Embodiment 3 of the present invention;

[0040] The labels in the diagram represent the following:

[0041] 1-Battery pack top cover; 11-Flange edge; 2-Profile; 21-Slide groove; 22-Pressure strip; 221-First rack; 222-First slope; 3-Connector; 31-Stepped hole; 311-Stepped surface; 32-Stepped shaft; 321-First shaft section; 322-Second shaft section; 33-First bolt; 34-Slot; 341-First threaded hole; 35-Second bolt; 4-Angle bracket; 41-Top cover; 411-First through hole; 42-Floating connector; 421-Second rack; 422 - Second slope; 423- Second threaded hole; 424- Guide post; 425- Spring mounting groove; 43- Fixed joint; 431- Insertion part; 432- Fitting part; 433- Guide hole; 434- Second through hole; 435- Connecting part; 436- Adapter part; 437- Third through hole; 44- Third bolt; 45- Spring; 5- Pressure frame; 6- Force-bearing frame; 7- Gasket; 71- Limiting hole; 8- Adapter; 81- Third threaded hole; 82- Fourth bolt; 83- Connecting hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The following are several exemplary embodiments of a custom-designed airtight tooling suitable for an airtightness testing device for a battery pack cover.

[0044] Example 1, please refer to Figure 1 , 2 .

[0045] The tooling includes: profile 2, connector 3, and corner bracket 4;

[0046] The connector 3 is used to coaxially or vertically connect the ends of multiple adjacent profiles 2. The connector 3 is inserted into the end face of the profile 2, and the connector 3 is slidably connected to the frame so that the tooling can be vertically raised and lowered.

[0047] Angle bracket 4 is used to vertically connect the ends of two adjacent profiles 2, and angle bracket 4 is fixedly connected to the side wall of profile 2;

[0048] Profile 2 is a long strip shape. Several profiles 2 are connected by connectors 3 and / or corner brackets 4 to form a pressing frame 5 and a force-bearing frame 6. The shape of the pressing frame 5 is the same as the shape of the flange edge 11 of the battery pack cover 1. The pressing frame 5 is used to press the battery pack cover 1 from top to bottom. The force-bearing frame 6 is installed inside the pressing frame 5. The force-bearing frame 6 is used to connect the pressing frame 5 and the cylinder of the airtightness testing equipment.

[0049] The frame refers to the frame of the air tightness testing equipment. The air tightness testing equipment is usually a press powered by a cylinder. The air tightness testing equipment is not shown in the figure.

[0050] Profile 2 is made of 40mm*40mm aluminum alloy with a thickness of 3mm. The specific thickness is selected according to the test pressure of the product. The surface of profile 2 is treated with electrophoresis or anodizing. Several profiles 2 are cut into different lengths according to the style of the battery pack cover being tested. Then, multiple profiles 2 are connected coaxially or perpendicularly through connector 3 to form right angle, T-shaped or cross connectors, and finally form the pressure frame 5 and the force support frame 6.

[0051] If necessary, threads can be tapped on the central hole and concave surface of the aluminum alloy profile. At the same time, one or more stainless steel plates can be installed on the convex surface of different aluminum alloy profiles by welding, and holes can be drilled and threads tapped at appropriate positions on the steel plates so that they can be connected to the cylinder barrel of the cylinder by bolts.

[0052] After connecting the fixture to the frame and cylinder, the fixture can be raised and lowered vertically under the drive of the cylinder. Using the fixture avoids having too many auxiliary plates, which would affect the efficiency of the test. It also avoids the cylinder of the telescopic cylinder from directly contacting the product when it moves downward, which could lead to product damage or even scrap.

[0053] Optional:

[0054] Since the connections between the various profiles 2 are basically made by self-tapping screws, bolts or welding, once the tooling is assembled, it is difficult to adjust the errors in the dimensions, angles and parallelism of the profiles 2 and the flange edge 11, and rework requires a lot of time.

[0055] in:

[0056] Profile 2, which is connected by self-tapping screws or bolts, will have its pre-formed threaded holes and bolt holes affected by secondary drilling.

[0057] Because of the high welding temperature, the ends of the profiles 2 are deformed, resulting in large internal stress between the profiles 2. Once the welded part is cut off, the included angle between the remaining profiles 2 will change, and the shape of the overall tooling will be difficult to restore to its original shape.

[0058] To solve the above technical problems, please refer to Figure 3-16 .

[0059] The profile 2 has a rectangular cross-section. Each sidewall of the profile 2 is formed with a groove 21 extending along the length of the profile 2. Two sides of the groove 21 near the outer surface of the profile 2 are formed with opposing pressure strips 22. The side of the pressure strip 22 facing the interior of the profile 2 is formed with a first toothed strip 221.

[0060] Corner bracket 4 includes: top cover 41, floating joint 42, and fixed joint 43;

[0061] Along a direction perpendicular to one side wall of profile 2, the top cover 41, floating joint 42, and fixed joint 43 are connected in sequence;

[0062] in,

[0063] The top cover 41 is used to cover the outer surface of the profile 2;

[0064] The floating joint 42 is connected to the upper cover 41 by the third bolt 44. The upper cover 41 and the floating joint 42 respectively clamp the two sides of the pressure strip 22. The side of the floating joint 42 near the upper cover 41 forms a second toothed rack 421. When the third bolt 44 is tightened, the upper cover 41 and the floating joint 42 move closer to each other, and the second toothed rack 421 is inserted into the first toothed rack 221 so that the floating joint 42 is rubbed against the profile 2.

[0065] The fixed joint 43 is detachably connected to the profile 2, the joint 3 or the cylinder, and the fixed joint 43 is slidably connected to the floating joint 42. The sliding direction of the floating joint 42 is parallel to the connection direction of the floating joint 42 and the fixed joint 43. When the third bolt 44 is not tightened, the floating joint 42 and the fixed joint 43 are spliced ​​to form a slide bar that slides in cooperation with the slide groove 21.

[0066] The sidewall of profile 2 refers to the wall surface other than the end face of profile 2. Profile 2 is formed by aluminum alloy extrusion process, and the first toothed rack 221 is formed by toothing machine.

[0067] During the assembly process, first connect the connector 3 and the corner bracket 4 according to the requirements to form a right-angle, T-shaped or cross joint. Then, insert the profile 2 and the corner bracket 4, that is, insert the floating connector 42 and the fixed connector 43 into the slide groove 21. Then tighten the third bolt 44 so that the top cover 41 and the floating connector 42 clamp the pressure strip 22, thus completing the assembly of the tooling.

[0068] Then check whether the tooling is qualified, that is, check whether the profile 2 can press the flange edge 11 just right. If the length of the profile 2 is inaccurate, loosen the third bolt 44, remove the profile 2 from the corner bracket 4, recut it and reinstall it. In this way, the pressure frame 5 and the load-bearing frame 6 can be easily and quickly disassembled and assembled.

[0069] It should also be noted that:

[0070] If the floating joint 42 is removed and the pressure strip 22 is clamped only by the upper cover 41 and the fixed joint 43, the distance between the profiles 2 or between the profiles 2 and the joint 3 will change when the third bolt 44 is tightened, which will cause a large internal stress between the profiles 2 or between the profiles 2 and the joint 3. Therefore, the floating joint 42 is necessary.

[0071] Furthermore:

[0072] The connector 3 is cubic in shape, and a slot 34 is formed at each corner of the connector 3 around the same center line. A first threaded hole 341 is formed on the slot 34. The corner bracket 4 is connected to the first threaded hole 341 by a second bolt 35.

[0073] Optionally, the corner bracket 4 has a variety of different specifications. One type of corner bracket 4 is used to connect one profile 2 and the connector 3, while another type of corner bracket 4 is used to connect two profiles 2 and the connector 3. The difference is reflected in the structure of the fixing connector 43.

[0074] First, please refer to Figure 3-7 :

[0075] The fixed connector 43 includes a plug-in portion 431 and a fitting portion 432. The fitting portion 432 is obliquely connected to one end of the plug-in portion 431. The angle between the plug-in portion 431 and the fitting portion 432 is 45°. The plug-in portion 431 and the floating connector 42 are spliced ​​to form the slide bar. The fitting portion 432 is fitted into the slot 34. A second through hole 434 is formed on the fitting portion 432. The second through hole 434 and the first threaded hole 341 are connected by a second bolt 35.

[0076] Secondly, please refer to Figure 15 and 16 .

[0077] The fixed connector 43 includes a plug-in portion 431 and a fitting portion 432. There are two plug-in portions 431, which are respectively connected to the two ends of the fitting portion 432. The included angle between the two plug-in portions 431 is 90°. Each plug-in portion 431 is spliced ​​with a floating connector 42 to form the slide bar. The fitting portion 432 is fitted into the slot 34. A second through hole 434 is formed on the fitting portion 432. The second through hole 434 and the first threaded hole 341 are connected by a second bolt 35.

[0078] Further, please refer to Figure 12 :

[0079] Each tooth of the first rack 221 has a first slope 222 on the side closest to the first direction, and the first direction is parallel to the length direction of the first rack 221.

[0080] Each tooth of the second rack 421 has a second slope 422 formed on the side closest to the second direction. The second direction is parallel to the length direction of the second rack 421, and the first direction and the second direction are opposite.

[0081] When the first rack 221 and the second rack 421 mesh with each other, the first slope 222 and the second slope 422 provide guiding slopes for the two to mesh with each other, so as to reduce the difficulty of the two meshing with each other.

[0082] Further, please refer to Figure 13 , 14 :

[0083] The upper cover 41 has a first through hole 411 for the third bolt 44 to pass through, and the floating joint 42 has a second threaded hole 423 for the third bolt 44 to be threadedly connected. The third bolt 44 passes through the first through hole 411 and is threadedly connected to the second threaded hole 423.

[0084] Further, please refer to Figure 9 , 11 13, 14:

[0085] A guide post 424 extending toward the fixed joint 43 is formed on the floating joint 42, and the axis of the guide post 424 is parallel to the connection direction of the floating joint 42 and the fixed joint 43.

[0086] The fixed joint 43 has a guide hole 433 that slides with the guide post 424. When the third bolt 44 is loosened or tightened, the guide post 424 is always slidably connected with the guide hole 433.

[0087] Specifically, the guide hole 433 is formed on the insertion part 431.

[0088] Further, please refer to Figure 9 , 11 :

[0089] The second threaded hole 423 is coaxial with the guide post 424, and the second threaded hole 423 passes through the floating joint 42 and the guide post 424.

[0090] Optional:

[0091] During the process of loosening the third bolt 44 and inserting the floating joint 42 and the fixed joint 43 into the slide groove 21, it is also necessary to lift the upper cover 41 to separate it from the floating joint 42. Otherwise, the upper cover 41 will collide with the pressure strip 22, making it difficult to insert the profile 2 and the corner bracket 4.

[0092] To solve the above technical problems, please refer to Figure 9 , 11 .

[0093] A spring 45 is installed between the top cover 41 and the floating joint 42. The spring 45 is embedded in the side of the floating joint 42 near the top cover 41. When the top cover 41 and the floating joint 42 approach each other, the spring 45 is compressed.

[0094] Further, please refer to Figure 9 , 11 :

[0095] The floating joint 42 has a spring mounting groove 425 recessed towards the fixed joint 43 on the side near the upper cover 41. The second threaded hole 423, the guide post 424 and the spring mounting groove 425 are coaxial.

[0096] Before tightening the third bolt 44, when the slide bar formed by the floating joint 42 and the fixed joint 43 is inserted into the slide groove 21 or slides inside the slide groove 21, under the action of the spring 45, the upper cover 41 is always away from the floating joint 42 and does not contact the pressure strip 22.

[0097] Furthermore:

[0098] A stepped hole 31 is formed on the connector 3. The stepped hole 31 passes through the center of the connector 3 along the direction of gravity, and the stepped surface 311 of the stepped hole 31 is located at the bottom end of the stepped hole 31.

[0099] A stepped shaft 32 is installed on the connector 3. The stepped shaft 32 includes a first shaft section 321 and a second shaft section 322 that are coaxial. The first shaft section 321 is inserted into the stepped hole 31 and connected to the stepped hole 31 by a first bolt 33. The head of the first bolt 33 abuts against the stepped surface 311. The diameter of the second shaft section 322 is larger than the diameter of the first shaft section 321. The end face of the second shaft section 322 abuts against the top surface of the connector 3.

[0100] The second shaft section 322 is used to connect the guide sleeve on the frame so that the tooling can be raised and lowered vertically along the direction of gravity.

[0101] Example 2, please refer to Figure 17 and 18 .

[0102] To improve the assembly speed of the tooling, the number of joints 3 needs to be appropriately reduced. In this case, in areas where joints 3 are not needed to connect the frame, two profiles 2 can be directly connected using the third type of corner bracket 4, as described below:

[0103] The fixed connector 43 includes a plug-in portion 431 and a connecting portion 435. There are two plug-in portions 431, which are respectively connected to the two ends of the connecting portion 435. The included angle between the two plug-in portions 431 is 90°. Each plug-in portion 431 is spliced ​​with a floating connector 42 to form the slide bar. The connecting portion 435 can slide inside the slide groove 21.

[0104] The fixed joint 43 connects the end of one profile 2 to the side wall of another profile 2, thereby directly forming a T-shaped or cross joint without the participation of the joint 3.

[0105] Furthermore, if an error occurs during the cutting of profile 2, resulting in profile 2 being shorter than expected, it can be compensated for in the following ways:

[0106] The tooling also includes a gasket 7 installed between profiles 2 or between profile 2 and connector 3, and the gasket 7 has a limiting hole 71 that allows two fixed connectors 43 to pass through.

[0107] The thickness and number of gaskets 7 can be selected as needed. The limiting hole 71 is used to limit the position of the gaskets 7 and prevent the gaskets 7 from sliding.

[0108] Example 4, please refer to Figure 19 and 20 .

[0109] When the tooling needs to be connected to a cylinder, the output end of the cylinder can also be directly connected using the fourth type of angle bracket 4, as described below:

[0110] The fixed connector 43 includes a plug-in portion 431, a connecting portion 435, and an adapter portion 436. The plug-in portion 431 and the adapter portion 436 are respectively connected to the two ends of the connecting portion 435. The included angle between the plug-in portion 431 and the adapter portion 436 is 90°. The plug-in portion 431 is spliced ​​with the floating connector 42 to form the slide bar. The connecting portion 435 can slide inside the slide groove 21. The adapter portion 436 is used to connect the cylinder.

[0111] Based on the above embodiments, the tooling is connected to the cylinder via the adapter 436, and under the drive of the cylinder, the tooling moves along a direction parallel to the slide groove 21.

[0112] Optional:

[0113] The adapter 436 has a third through hole 437. The adapter 436 is connected to the cylinder through the adapter 8. The adapter 8 is in the shape of an angle steel. One side of the adapter 8 has a third threaded hole 81. The third threaded hole 81 and the third through hole 437 are connected by a fourth bolt 82. The other side of the adapter 8 has a connecting hole 83. The connecting hole 83 is used to connect the cylinder.

[0114] Based on the above embodiments, the tooling is connected to the cylinder through the connecting hole 83, and under the drive of the cylinder, the tooling moves along a direction perpendicular to the slide groove 21.

[0115] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A customized airtight tooling for a battery pack cover airtightness testing device, characterized in that, include: Profile (2), connector (3) and corner bracket (4); The connector (3) is used to coaxially or vertically connect the ends of multiple adjacent profiles (2), the connector (3) is inserted into the end face of the profile (2), and the connector (3) is slidably connected to the frame so that the tooling can be vertically lifted and lowered. The corner bracket (4) is used to vertically connect the ends of two adjacent profiles (2), and the corner bracket (4) is fixedly connected to the side wall of the profile (2); The profile (2) is long and narrow. Several profiles (2) are connected by the joint (3) and / or the corner bracket (4) to form a pressing frame (5) and a force-bearing frame (6). The shape of the pressing frame (5) is the same as the shape of the flange edge (11) of the battery pack cover (1). The pressing frame (5) is used to press the battery pack cover (1) from top to bottom. The force-bearing frame (6) is installed inside the pressing frame (5). The force-bearing frame (6) is used to connect the pressing frame (5) and the cylinder of the airtightness testing equipment. The profile (2) has a rectangular cross-section. Each sidewall of the profile (2) is formed with a groove (21) extending along the length of the profile (2). Two opposing pressure strips (22) are formed on the two sides of the groove (21) near the outer surface of the profile (2). A first toothed strip (221) is formed on the side of the pressure strip (22) facing the inside of the profile (2). The corner bracket (4) includes: a top cover (41), a floating joint (42), and a fixed joint (43). Along a direction perpendicular to one sidewall of the profile (2), the top cover (41), the floating joint (42), and the fixed joint (43) are connected in sequence; in, The top cover (41) is used to cover the outer surface of the profile (2); The floating joint (42) is connected to the upper cover (41) by a third bolt (44). The upper cover (41) and the floating joint (42) respectively clamp the two sides of the pressure strip (22). The side of the floating joint (42) near the upper cover (41) has a second toothed rack (421). When the third bolt (44) is tightened, the upper cover (41) and the floating joint (42) move closer to each other, and the second toothed rack (421) is inserted into the first toothed rack (221) so that the floating joint (42) is frictionally connected to the profile (2). The fixed joint (43) is detachably connected to the profile (2), the joint (3) or the cylinder, and the fixed joint (43) is slidably connected to the floating joint (42). The sliding direction of the floating joint (42) is parallel to the connection direction of the floating joint (42) and the fixed joint (43). When the third bolt (44) is not tightened, the floating joint (42) and the fixed joint (43) are spliced ​​together to form a sliding strip that slides in cooperation with the sliding groove (21). The upper cover (41) has a first through hole (411) for the third bolt (44) to pass through, and the floating joint (42) has a second threaded hole (423) for the third bolt (44) to be threadedly connected. The third bolt (44) passes through the first through hole (411) and is threadedly connected to the second threaded hole (423). The floating joint (42) has a guide post (424) extending toward the fixed joint (43), and the fixed joint (43) has a guide hole (433) that slides with the guide post (424). When the third bolt (44) is loosened or tightened, the guide post (424) is always slidably connected with the guide hole (433). The second threaded hole (423) is coaxial with the guide post (424), and the second threaded hole (423) passes through the floating joint (42) and the guide post (424).

2. The customized airtight fixture for a battery pack cover airtightness testing device according to claim 1, characterized in that, The connector (3) is cubic in shape, and a slot (34) is formed at each corner of the connector (3) around the same center line. A first threaded hole (341) is formed on the slot (34), and the corner bracket (4) is connected to the first threaded hole (341) by a second bolt (35).

3. The customized airtight fixture for a battery pack cover airtightness testing device according to claim 2, characterized in that, The fixed connector (43) includes a plug-in part (431) and a fitting part (432). The fitting part (432) is obliquely connected to one end of the plug-in part (431). The angle between the plug-in part (431) and the fitting part (432) is 45°. The plug-in part (431) and the floating connector (42) are spliced ​​to form the slide bar. The fitting part (432) is fitted into the slot (34). A second through hole (434) is formed on the fitting part (432). The second through hole (434) and the first threaded hole (341) are connected by the second bolt (35). or-- The fixed connector (43) includes a plug-in part (431) and a fitting part (432). There are two plug-in parts (431) and they are respectively connected to the two ends of the fitting part (432). The included angle between the two plug-in parts (431) is 90°. Each plug-in part (431) is spliced ​​with one floating connector (42) to form the slide. The fitting part (432) is fitted into the slot (34). The fitting part (432) has a second through hole (434). The second through hole (434) and the first threaded hole (341) are connected by the second bolt (35).

4. The customized airtight fixture for a battery pack cover airtightness testing device according to claim 2, characterized in that, A stepped hole (31) is formed on the connector (3). The stepped hole (31) passes through the center of the connector (3) along the direction of gravity. The stepped surface (311) of the stepped hole (31) is located at the bottom end of the stepped hole (31). The connector (3) is equipped with a stepped shaft (32), which includes a first shaft segment (321) and a second shaft segment (322) that are coaxial. The first shaft segment (321) is inserted into the stepped hole (31) and connected to the stepped hole (31) by a first bolt (33). The head of the first bolt (33) abuts against the stepped surface (311). The diameter of the second shaft segment (322) is larger than the diameter of the first shaft segment (321). The end face of the second shaft segment (322) abuts against the top surface of the connector (3).

5. A customized airtight fixture for a battery pack cover airtightness testing device according to claim 1, characterized in that, The fixed connector (43) includes a plug-in part (431) and a connecting part (435). There are two plug-in parts (431) and they are respectively connected to the two ends of the connecting part (435). The included angle between the two plug-in parts (431) is 90°. Each plug-in part (431) is spliced ​​with one floating connector (42) to form the slide bar. The connecting part (435) can slide inside the slide groove (21).

6. A customized airtight fixture for a battery pack cover airtightness testing device according to claim 1, characterized in that, The fixed connector (43) includes a plug-in part (431), a connecting part (435), and an adapter part (436). The plug-in part (431) and the adapter part (436) are respectively connected to the two ends of the connecting part (435). The included angle between the plug-in part (431) and the adapter part (436) is 90°. The plug-in part (431) is spliced ​​with the floating connector (42) to form the slide bar. The connecting part (435) can slide inside the slide groove (21). The adapter (436) has a third through hole (437) formed on it. The adapter (436) is connected to the cylinder through an adapter (8). The adapter (8) is in the shape of an angle steel. One side of the adapter (8) has a third threaded hole (81). The third threaded hole (81) and the third through hole (437) are connected by a fourth bolt (82). The other side of the adapter (8) has a connecting hole (83) for connecting the cylinder.

7. A customized airtight fixture for a battery pack cover airtightness testing device according to any one of claims 1-6, characterized in that, It also includes a gasket (7) installed between the profile (2) and the profile (2) or between the profile (2) and the connector (3), wherein the gasket (7) has a limiting hole (71) through which the two fixed connectors (43) can pass.

8. A customized airtight fixture for a battery pack cover airtightness testing device according to claim 1, characterized in that, A spring (45) is installed between the top cover (41) and the floating joint (42). The floating joint (42) has a spring mounting groove (425) recessed toward the fixed joint (43) on the side near the top cover (41). The second threaded hole (423), the guide post (424) and the spring mounting groove (425) are coaxial. The spring (45) is compressed when the top cover (41) and the floating joint (42) are close to each other.

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