gripping device

Abstract

This utility model provides a clamping device, including a base and a clamping mechanism. The base supports the workpiece to be welded, and the clamping mechanism is disposed above the base. The clamping mechanism includes a first clamping component and a second clamping component arranged opposite to each other. The workpiece to be welded is disposed between the first clamping component and the second clamping component. Both the first clamping component and the second clamping component include a first clamp and a second clamp. The second clamp is disposed on the side of the first clamp away from the base. The distance between the second clamp and the workpiece to be welded is smaller than the distance between the first clamp and the workpiece to be welded. An elastic structure is provided on the side of the second clamp closer to the workpiece to be welded. The workpiece to be welded is clamped in sections by the first clamp and the second clamp. Combined with the elastic structure, the gap caused by the assembly tolerance of the workpiece to be welded due to dimensional errors or deformation can be adaptively compensated, thereby improving the tightness and sealing of the welding interface, and thus improving the welding consistency and yield.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a clamping device. Background Technology

[0002] Square aluminum-cased batteries are widely used in power and energy storage batteries due to their compact structure, high energy density, and good mechanical strength. During battery packaging, full-welding is a crucial step to ensure battery sealing and structural strength. It involves laser welding the top cover to the aluminum casing along the perimeter to form a sealed structure, preventing electrolyte leakage and improving overall strength. In related technologies, long, straight clamps are typically used to press the top cover firmly. The flatness of the contact surface between the clamp and the aluminum casing must be controlled within 0.01 mm to minimize weld gaps.

[0003] However, while long, straight clamps can ensure a tight fit between the top cover and the aluminum casing when the battery length is short, for longer batteries, the clamps struggle to achieve uniform force and a perfect fit due to issues with the flatness and deformation of the incoming aluminum casing and top cover, resulting in localized micro-gaps. During laser welding, the laser beam may penetrate these gaps and burn the internal core, affecting battery electrical performance and safety, and even posing a risk of thermal runaway. Utility Model Content

[0004] This embodiment provides a clamping device for precisely clamping the shell and cover plate of the workpiece to be welded, so as to improve the clamping stability and uniformity of the workpiece during the laser full welding process.

[0005] This embodiment provides a clamping device, including

[0006] The base is used to support the parts to be welded.

[0007] A clamping mechanism is disposed above the base. The clamping mechanism includes a first clamping assembly and a second clamping assembly disposed opposite to each other. The workpiece to be welded is disposed between the first clamping assembly and the second clamping assembly.

[0008] The first clamp assembly and the second clamp assembly each include a first clamp and a second clamp. The second clamp is disposed on the side of the first clamp away from the base. The distance between the second clamp and the workpiece to be welded is less than or equal to the distance between the first clamp and the workpiece to be welded. Furthermore, the side of the second clamp close to the workpiece to be welded is provided with an elastic structure.

[0009] In one embodiment, the second clamp includes a plurality of sub-clamps arranged sequentially along a first direction, wherein the sub-clamps are elastic structures;

[0010] Wherein, the first direction is parallel to the horizontal plane of the base on the side near the clamping mechanism.

[0011] In one embodiment, the outer contour of the sub-clamp near the workpiece to be welded is arc-shaped, and the arc of the outer contour of the sub-clamp near the workpiece to be welded is less than or equal to 30°.

[0012] In one embodiment, the first clamp includes:

[0013] The first support member extends along the second direction;

[0014] A first clamping member, one end of which is connected to the first support member, and the other end of which extends in a third direction;

[0015] Wherein, the second direction is the direction from the first clamping assembly to the second clamping assembly, and the third direction is the direction from the base to the clamping mechanism.

[0016] In one embodiment, the second clamp includes:

[0017] The second support member is disposed on the side of the first support member away from the base, and the second support member is fixedly connected to the first support member;

[0018] The second clamping member has one end connected to the second support member, and the other end of the second clamping member extends from the second support member toward the part to be welded. The elastic structure is provided on the side of the second clamping member that is close to the part to be welded.

[0019] In one embodiment, the first clamping member and the second clamping member are spaced apart, and along the third direction, the distance between the side of the first clamping member near the second clamping member and the side of the second clamping member near the first clamping member is greater than or equal to 5 mm and less than or equal to 10 mm.

[0020] In one embodiment, the base includes a first support, a second support, and a connector connecting the first support and the second support, wherein the part to be welded is located on the side of the second support away from the first support;

[0021] The first support and the second support both extend along the width direction of the workpiece to be welded, and the connector extends along the height direction of the workpiece to be welded.

[0022] In one embodiment, the clamping device further includes a moving mechanism disposed between the clamping mechanism and the base, one end of the moving mechanism being fixedly connected to the base, and the other end of the moving mechanism being slidably connected to the clamping mechanism.

[0023] In one embodiment, the workpiece to be welded includes:

[0024] The shell has a receiving cavity;

[0025] A cover plate for sealing the receiving cavity, the cover plate including a first contact portion that contacts the housing, the first contact portion being located within the receiving cavity and being continuously arranged circumferentially along the opening of the housing;

[0026] The housing includes a second contact portion corresponding to the first contact portion, and the second contact portion surrounds the cover plate; the first clamp is used to clamp the housing, and the second clamp is used to clamp the second contact portion.

[0027] In one embodiment, the distance between the contact point between the second clamp and the outer surface of the second contact portion and the side of the cover plate away from the base is greater than or equal to 1 mm and less than or equal to 1.5 mm.

[0028] The beneficial effects of this embodiment:

[0029] This utility model provides a clamping device, including a base and a clamping mechanism. The base supports the workpiece to be welded, and the clamping mechanism is disposed above the base. The clamping mechanism includes a first clamping component and a second clamping component disposed opposite to each other. The workpiece to be welded is disposed between the first clamping component and the second clamping component. Both the first clamping component and the second clamping component include a first clamp and a second clamp. The second clamp is disposed on the side of the first clamp away from the base. The distance between the second clamp and the workpiece to be welded is smaller than the distance between the first clamp and the workpiece to be welded. An elastic structure is provided on the side of the second clamp closer to the workpiece to be welded. The workpiece to be welded is clamped in sections by the first clamp and the second clamp. Combined with the elastic structure, the gap caused by the assembly tolerance of the workpiece to be welded due to dimensional errors or deformation can be adaptively compensated, thereby improving the tightness and sealing of the welding interface, and thus improving the welding consistency and yield. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the assembly structure of the clamping device and the battery to be welded provided in an embodiment of this utility model;

[0032] Figure 2 Provided for the embodiments of this utility model Figure 1A front view structural diagram;

[0033] Figure 3 This is a schematic diagram of the clamping device provided in an embodiment of the present utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the base provided in an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the clamping mechanism provided in the embodiment of this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the first clamp provided in the embodiment of this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the second clamp provided in the embodiment of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Clamping device; 10-Elastic structure; 11-Base; 12-Clamping mechanism; 13-Moving mechanism; 111-First support seat; 112-Second support seat; 113-Connector; 12A-First clamping assembly; 12B-Second clamping assembly; 121-First clamp; 122-Second clamp; 121A-First support member; 121B-First clamping member; 1210-Bolt hole; 1220-Sub-clamp; 122A-Second support member; 122B-Second clamping member; 1221-Through hole; 131-Support part; 132-Slide rail; 133-Slider;

[0040] 2-Component to be welded; 20-Joint gap; 21-Shell; 22-Battery cell; 23-Cover plate; 231-First contact part; 211-Second contact part. Detailed Implementation

[0041] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides a clamping device 1, which is used for the laser welding process of the workpiece 2 to be welded. Specifically, it is used to achieve precise positioning and uniform pressing during the full welding process of the shell 21 and the cover plate 23 of the workpiece 2 to be welded. The workpiece 2 to be welded includes, but is not limited to, a square aluminum shell battery.

[0043] The clamping device 1 includes a base 11, a clamping mechanism 12, and a moving mechanism 13. The base 11 serves as a support platform for the clamping device 1, providing a stable support for the workpiece 2 to be welded and serving as the mounting base for other mechanisms. The clamping mechanism 12 is positioned above the base 11 and is used to precisely clamp and position the workpiece 2 to be welded. The moving mechanism 13 is located between the clamping mechanism 12 and the base 11, and is used to enable the clamping mechanism 12 to reciprocate along a first direction X. The first direction X is parallel to the horizontal plane of the base 11 on the side closest to the clamping mechanism 12.

[0044] The component to be welded 2 may include a housing 21, a battery cell 22, and a cover plate assembly. The housing 21 has a receiving cavity for supporting and protecting the battery cell 22. The battery cell 22 is installed in the receiving cavity. The cover plate assembly includes a cover plate 23 for sealing the receiving cavity. The cover plate 23 can be permanently sealed to the housing 21 by laser welding to achieve complete sealing of the internal environment of the component to be welded 2.

[0045] The base 11 includes a first support 111, a second support 112, and a connector 113 connecting the first support 111 and the second support 112. The workpiece 2 to be welded is located on the side of the second support 112 away from the first support 111. The extension direction of the first support 111 is parallel to the extension direction of the second support 112, and the extension direction of the connector 113 is perpendicular to the extension direction of the first support 111. This forms an "I"-shaped rigid support structure, improving the stability of the workpiece 2 during clamping and providing a reliable support platform for subsequent welding. It also facilitates clamping and adjustment operations for operators.

[0046] The clamping mechanism 12 includes a first clamping assembly 12A and a second clamping assembly 12B arranged opposite to each other. The workpiece 2 to be welded is disposed between the first clamping assembly 12A and the second clamping assembly 12B. The first clamping assembly 12A and the second clamping assembly 12B each include a first clamp 121 and a second clamp 122. The first clamp 121 and the second clamp 122 act on different positions on the outer surface of the housing 21, thereby realizing segmented clamping of the workpiece 2 to be welded, and thus improving the clamping uniformity and fit of the clamping mechanism 12.

[0047] Specifically, the first clamp assembly 12A and the second clamp assembly 12B can be spaced apart along the width direction of the workpiece 2 to be welded. Both the first clamp assembly 12A and the second clamp assembly 12B include a first clamp 121 and a second clamp 122. The second clamp 122 is disposed on the side of the first clamp 121 away from the base 11. The distance between the second clamp 122 and the workpiece 2 to be welded is less than or equal to the distance between the first clamp 121 and the workpiece 2 to be welded. Furthermore, an elastic structure 10 is provided on the side of the second clamp 122 close to the workpiece 2 to be welded.

[0048] The elastic structure 10 includes, but is not limited to, materials or components with certain elastic recovery properties such as spring steel, silicone pads, elastic rubber blocks, corrugated sheets, and shape memory alloy parts. The elastic structure 10 is disposed on the side of the second clamp 122 close to the workpiece 2 to be welded, and can generate a certain elastic pre-pressure during the clamping process, thereby achieving flexible contact with the surface of the workpiece 2 to be welded, thereby improving the stability of the clamping device 1 and the contact effect of the welding interface.

[0049] It is understood that the elastic structure 10 can adaptively compensate for the gaps caused by assembly tolerances of the workpiece 2 to be welded due to factors such as dimensional errors or deformation. It is particularly suitable for scenarios where there is insufficient flatness of incoming materials or local deformation between the housing 21 and the cover plate 23. In such cases, the clamps in related technologies are difficult to achieve uniform distribution of clamping force and full fit, resulting in small gaps at the connection between the housing 21 and the cover plate 23. However, by using the first clamp 121 and the second clamp 122 to clamp the workpiece 2 to be welded in sections, and combined with the adaptive compensation capability of the elastic structure 10, the clamping fit of the clamping device 1 on the workpiece 2 to be welded and the sealing of the welding interface can be enhanced, thereby improving welding consistency and increasing the yield of finished products.

[0050] The moving mechanism 13 is disposed between the clamping mechanism 12 and the base 11. One end of the moving mechanism 13 is fixedly connected to the base 11, and the other end of the moving mechanism 13 is slidably connected to the clamping device 1, so that the clamping mechanism 12 can reciprocate along the width direction of the workpiece 2 to be welded, thereby realizing precise adjustment of the distance between the clamping assembly and the workpiece 2 to be welded, and thus enabling the clamping device 1 to adapt to battery products of different specifications and sizes, improving the versatility and process adaptability of the clamping device 1.

[0051] Specifically, the moving mechanism 13 includes a support 131, a slide rail 132, and a slider 133. The support 131 is disposed between the clamping mechanism 12 and the base 11, the slide rail 132 is disposed between the support 131 and the clamping mechanism 12, and the slider 133 is disposed between the slide rail 132 and the clamping mechanism 12. One end of the slider 133 is fixedly connected to the clamping mechanism 12, and the other end of the slider 133 is slidably connected to the slide rail 132. The support 131 is fixedly mounted on the base 11 to provide stable support for the slide rail 132, thereby enabling the clamping mechanism 12 to reciprocate along the width direction of the workpiece 2 to be welded.

[0052] Furthermore, the clamping device 1 may also include a driving mechanism (not shown in the figure), which may be disposed between the moving mechanism 13 and the base 11. The driving mechanism is connected to the clamping mechanism 12 and is used to drive the clamping mechanism 12 to reciprocate along the slide rail 132 to achieve the positioning and fixing of the workpiece 2 before welding and the rapid release after welding, thereby realizing the adjustable clamping of the workpiece 2.

[0053] It should be noted that the drive mechanism includes, but is not limited to, cylinders, electric push rods, servo motors with lead screw mechanisms, hydraulic cylinders, or other structures that can provide linear drive. In actual operation, operators can flexibly select the drive mechanism according to process requirements to adapt to the clamping requirements of different specifications of the workpieces 2 to be welded, thereby improving the applicability and automation level of the clamping device 1. Furthermore, to adapt to special working conditions or simplify the operation process, the clamping device can also be equipped with a manual adjustment mechanism to realize the movement of the clamping mechanism 12 through mechanical transmission methods such as worm gears or screw adjustments, thereby providing operators with greater process flexibility.

[0054] It is understood that this embodiment achieves stable support, precise positioning and uniform pressing of the workpiece 2 to be welded through the coordinated cooperation of the base 11, the clamping mechanism 12, the moving mechanism 13 and the driving mechanism, so as to ensure the tight fit between the shell 21 and the cover plate 23 of the workpiece 2 to be welded during the laser welding process.

[0055] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In one embodiment, the first clamp 121 includes a first support member 121A and a first clamping member 121B. The first support member 121A extends along a second direction Y, one end of the first clamping member 121B is connected to the first support member 121A, and the other end of the first clamping member 121B extends along a third direction Z. Wherein, the second direction Y is the direction from the first clamping member 12A to the second clamping member 12B, and the third direction Z is the direction from the base 11 to the clamping mechanism 12. When the workpiece 2 to be welded is in a clamping state, the second clamping member 122B at least abuts against a portion of the housing 21 to achieve clamping of the housing 21 by the first clamping member 121B.

[0056] Specifically, the relationship between the contact area between the first clamping member 121B and the housing 21 and the area of ​​the housing 21 near the first clamping member 121B satisfies: 70% ≤ S2 / S1 ≤ 80%; wherein, the area of ​​the housing 21 near the first clamping member 121B is S1, and the contact area between the first clamping member 121B and the housing 21 is S2, so that the clamping force of the first clamping member 121B can be fully transmitted to the housing 21 of the workpiece to be welded, providing a stable clamping and fixing effect.

[0057] It is understood that by controlling the ratio between the contact area between the first clamping member 121B and the housing 21 and the area of ​​the housing 21 near the first clamping member 121B (for example, the contact area between the first clamping member 121B and the housing 21 is 70% of the area of ​​the housing 21 near the first clamping member 121B), this embodiment can not only ensure the transmission effect of the clamping force of the first clamping member 121B, but also avoid the problem of local stress concentration on the housing 21 due to the excessively large contact area between the first clamping member 121B and the housing 21. This allows the clamping device 1 to ensure the accurate positioning of the workpiece 2 to be welded while preventing deformation of the housing 21, thereby improving welding quality and product consistency.

[0058] Furthermore, along the length direction of the workpiece 2 to be welded, the length of the first clamping member 121B is greater than the length of the workpiece 2 to be welded, so that the workpiece 2 to be welded can obtain a uniform and stable clamping force throughout its entire length range, avoiding insufficient clamping force at the end, thereby improving the accurate positioning and stable fixation of the workpiece 2 to be welded during the welding process.

[0059] When the workpiece 2 to be welded undergoes thermal expansion during the welding process due to laser welding, by setting the length of the first clamping member 121B to be greater than the length of the workpiece 2 to be welded, the necessary expansion space can be provided for the workpiece 2 to be welded, effectively alleviating stress concentration caused by thermal deformation and protecting the structural integrity of the workpiece 2 to be welded. At the same time, the design that the length of the first clamping member 121B is greater than the length of the workpiece 2 to be welded improves the adaptability of the clamping device 1 to batteries of different specifications, enabling the same set of clamps to be compatible with the production of batteries of multiple sizes, and enhancing the versatility and production line compatibility of the clamping device 1.

[0060] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In one embodiment, the second clamp 122 includes a plurality of sub-clamps 1220 arranged sequentially along the first direction X. The sub-clamps 1220 are elastic structures 10. The plurality of sub-clamps 1220 are used to clamp the connection between the housing 21 and the cover plate 23. By clamping the workpiece 2 to be welded at multiple points through the plurality of sub-clamps 1220, the clamping force distribution can be adaptively adjusted according to the length / width of the workpiece 2 to be welded. This avoids the problems of uneven fit and local gaps that exist in long straight clamps in long welded parts in related technologies, thereby improving the quality of laser welding and improving the battery sealing performance and structural strength.

[0061] Specifically, multiple sub-clamps 1220 can be arranged sequentially along the length of the workpiece 2 to be welded. The outer contour of the sub-clamp 1220 near the workpiece 2 is arc-shaped. Through the arc design, the effective contact surface at the joint between the sub-clamp 1220 and the shell 21 and cover plate 23 of the workpiece 2 to be welded can be increased, so that the clamping pressure applied by the sub-clamp 1220 can be evenly distributed, avoiding excessive local pressure that could damage the surface of the workpiece 2 to be welded. The arc of the outer contour of the sub-clamp 1220 near the workpiece 2 to be welded is less than or equal to 30°, thereby avoiding loss of positioning accuracy of the workpiece 2 to be welded due to excessive arc.

[0062] Furthermore, the second clamp 122 adopts a composite structure design. The second clamp 122 includes a second support member 122A and a second clamping member 122B. The second support member 122A is disposed on the side of the first support member 121A away from the base 11. The second support member 122A is fixedly connected to the first support member 121A, thereby constructing a rigid support frame.

[0063] One end of the second clamping member 122B is connected to the second support member 122A, and the other end of the second clamping member 122B extends from the second support member 122A toward the part to be welded 2. The elastic structure 10 is provided on the side of the second clamping member 122B near the part to be welded 2 to achieve precise clamping control of the part to be welded 2.

[0064] Specifically, the second support member 122A can be fixedly connected to the first support member 121A by bolts, thereby forming a stable rigid support frame. The second support member 122A has multiple through holes 1221, and the first support member 121A has multiple bolt holes 1210. Each bolt hole 1210 corresponds to one through hole 1221. The bolts are used to fix the second support member 122A and the first support member 121A through the through holes 1221 and the bolt holes 1210, thereby improving the rigidity and stability of the clamping mechanism 12. This ensures that the clamping mechanism 12 will not displace or vibrate due to external forces during the welding process of the workpiece 2 to be welded. Simultaneously, it facilitates disassembly, maintenance, and partial replacement, improving the maintainability and flexibility of the clamping device 1.

[0065] Furthermore, along the length direction of the workpiece 2 to be welded, the second clamping member 122B includes a plurality of distributed sub-clamps 1220, the outer contour of the sub-clamps 1220 near the workpiece 2 to be welded is arc-shaped; it can be understood that the segmented layout of the plurality of sub-clamps 1220 allows the clamping force applied by the second clamping member 122B to be evenly distributed along the length direction of the workpiece 2 to be welded, thereby achieving a uniform distribution of clamping force.

[0066] Meanwhile, the thickness of the sub-clamp 1220 is greater than or equal to 2 mm and less than or equal to 4 mm, and the curvature of the outer contour of the sub-clamp 1220 near the part to be welded 2 is less than or equal to 30°, so that the contact surface between the sub-clamp 1220 and the housing 21 and the cover plate 23 can be smoothly transitioned, avoiding the stress concentration phenomenon common in right-angle contact surfaces in related technologies, ensuring that the part to be welded 2 will not experience stress abrupt changes during clamping, thereby effectively protecting the structural integrity of the part to be welded 2; in addition, the arc design also facilitates cleaning and maintenance, can reduce the accumulation of impurities such as metal shavings on the contact surface, and further improve the clamping accuracy and service life of the clamping mechanism 12 in long-term use.

[0067] It is understood that the second clamping member 122B is disposed on the side of the second support member 122A away from the second clamp 122, and adopts a cantilever structure extending from the second support member 122A toward the part to be welded 2. The second clamping member 122B is used to perform segmented clamping at the connection between the housing 21 and the cover plate 23. The second clamping member 122B includes a plurality of sub-clamps 1220 evenly distributed along the length of the battery. The other end of the plurality of sub-clamps 1220 can be integrally formed, thereby integrating the plurality of sub-clamps 1220 with the second support member 122A into an integral structure, improving the mechanical strength and rigidity of the second clamp 122, and preventing vibration and deformation of the clamping mechanism 12 during the welding process of the part to be welded 2.

[0068] Meanwhile, the integral molding connection method ensures the consistency of the reference surfaces of each of the sub-clamps 1220, making the clamping force applied at the joint of the shell 21 and the cover plate 23 of the workpiece to be welded more evenly distributed along the length direction of the workpiece to be welded.

[0069] It is understood that the multiple sub-clamps 1220 can apply precise and controllable clamping force to different sections of the connection between the housing 21 and the cover plate 23, which is particularly suitable for large batteries with a length exceeding 500mm. This avoids deformation errors and assembly tolerances at the joint between the housing 21 and the cover plate 23 due to the excessive length of the part to be welded 2, thereby achieving uniform pressing of the cover plate 23 and the housing 21 throughout the entire length range and improving the sealing reliability of laser welding. At the same time, the design of the multiple sub-clamps 1220 also has adaptive adjustment capability, which can automatically adjust the clamping parameters according to different battery specifications, thereby enhancing the versatility and production efficiency of the clamping mechanism 12.

[0070] Furthermore, the sub-clamp 1220 is spaced apart from the first clamping member 121B, and along the third direction Z, the distance L1 between the side of the sub-clamp 1220 near the first clamping member 121B and the side of the first clamping member 121B near the sub-clamp 1220 is greater than 5 mm and less than 10 mm, thereby maintaining a safe distance between the sub-clamp 1220 and the second clamping member 122B, avoiding the risk of collision between components during clamping, improving the safety of the clamping device 1, and thus improving the reliability and production efficiency of the welding process.

[0071] It should be noted that, in this embodiment, the length direction of the workpiece to be welded is consistent with the first direction, and both correspond to... Figure 1 The X direction; the width direction of the workpiece to be welded is consistent with the second direction, and both correspond to... Figure 1 The Y direction; the height direction of the part to be welded is consistent with the third direction, and both correspond to... Figure 1 The Z direction is defined as follows: The above direction definition is only an illustrative example of this embodiment. In actual application scenarios, it can be adjusted according to the specific equipment installation location without affecting the implementation effect of this technical solution.

[0072] Please continue to combine Figures 1 to 7 In one embodiment, the cover plate 23 includes a first contact portion 231 that contacts the housing 21. The first contact portion 231 is located within the receiving cavity and is continuously arranged circumferentially along the opening of the housing 21 to form a complete sealing annular structure. The housing 21 includes a second contact portion 211 corresponding to the first contact portion 231, and the second contact portion 211 is arranged around the cover plate 23.

[0073] When the workpiece 2 to be welded is in a clamped state, the second clamp 122 at least abuts against a portion of the second contact portion 211. The second clamp 122 applies clamping force to the connection between the housing 21 and the cover plate 23 through the second contact portion 211, so as to achieve the second clamp 122 clamping the workpiece 2 to be welded.

[0074] Furthermore, there is a splicing gap 20 between the housing 21 and the cover plate 23. The splicing gap 20 is converted into a weld after laser welding. The second clamp 122 does not contact the splicing gap 20, thereby avoiding accidental damage to the second clamp 122 by the laser during the welding process of the workpiece 2 to be welded.

[0075] Specifically, the distance L2 between the contact point between the second clamp 122 and the outer surface of the second contact portion 211 and the side of the cover plate 23 away from the base 11 is greater than or equal to 1 mm and less than or equal to 1.5 mm. By maintaining a safe distance between the second clamp 122 and the splicing gap 20, the risk of the sub-clamp 1220 being accidentally welded to the workpiece 2 during the welding process is reduced.

[0076] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A clamping device, characterized in that, include: The base is used to support the parts to be welded. A clamping mechanism is disposed above the base. The clamping mechanism includes a first clamping assembly and a second clamping assembly disposed opposite to each other. The workpiece to be welded is disposed between the first clamping assembly and the second clamping assembly. The first clamp assembly and the second clamp assembly each include a first clamp and a second clamp. The second clamp is disposed on the side of the first clamp away from the base. The distance between the second clamp and the workpiece to be welded is less than or equal to the distance between the first clamp and the workpiece to be welded. Furthermore, the side of the second clamp close to the workpiece to be welded is provided with an elastic structure.

2. The clamping device according to claim 1, characterized in that, The second clamp includes a plurality of sub-clamps arranged sequentially along a first direction, wherein the sub-clamps are elastic structures; Wherein, the first direction is parallel to the horizontal plane of the base on the side near the clamping mechanism.

3. The clamping device according to claim 2, characterized in that, The outer contour of the sub-clamp near the workpiece to be welded is arc-shaped, and the arc of the outer contour of the sub-clamp near the workpiece to be welded is less than or equal to 30°.

4. The clamping device according to any one of claims 1 to 3, characterized in that, The first fixture includes: The first support member extends along the second direction; A first clamping member, one end of which is connected to the first support member, and the other end of which extends in a third direction; Wherein, the second direction is the direction from the first clamping assembly to the second clamping assembly, and the third direction is the direction from the base to the clamping mechanism.

5. The clamping device according to claim 4, characterized in that, The second clamp includes: The second support member is disposed on the side of the first support member away from the base, and the second support member is fixedly connected to the first support member; The second clamping member has one end connected to the second support member, and the other end of the second clamping member extends from the second support member toward the part to be welded. The elastic structure is provided on the side of the second clamping member that is close to the part to be welded.

6. The clamping device according to claim 5, characterized in that, The first clamping member and the second clamping member are spaced apart, and along the third direction, the distance between the side of the first clamping member closer to the second clamping member and the side of the second clamping member closer to the first clamping member is greater than or equal to 5 mm and less than or equal to 10 mm.

7. The clamping device according to any one of claims 1 to 3, characterized in that, The base includes a first support, a second support, and a connector connecting the first support and the second support. The part to be welded is located on the side of the second support away from the first support. The first support and the second support both extend along the width direction of the workpiece to be welded, and the connector extends along the height direction of the workpiece to be welded.

8. The clamping device according to any one of claims 1 to 3, characterized in that, The clamping device further includes a moving mechanism, which is disposed between the clamping mechanism and the base. One end of the moving mechanism is fixedly connected to the base, and the other end of the moving mechanism is slidably connected to the clamping mechanism.

9. The clamping device according to any one of claims 1 to 3, characterized in that, The parts to be welded include: The shell has a receiving cavity; A cover plate for sealing the receiving cavity, the cover plate including a first contact portion that contacts the housing, the first contact portion being located within the receiving cavity and being continuously arranged circumferentially along the opening of the housing; The housing includes a second contact portion corresponding to the first contact portion, and the second contact portion surrounds the cover plate; the first clamp is used to clamp the housing, and the second clamp is used to clamp the second contact portion.

10. The clamping device according to claim 9, characterized in that, The distance between the contact point between the second clamp and the outer surface of the second contact portion and the side of the cover plate away from the base is greater than or equal to 1 mm and less than or equal to 1.5 mm.

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