A pressure head quick change assembly and battery laser welding device

Abstract

The utility model provides a kind of pressure head quick-change assembly and battery laser welding device, belong to welding equipment technical field, comprising: quick-change pressure head, it includes plug-in part;Connecting piece, it includes at least two connecting rods of fixed setting, and the through plug-in space is enclosed between multiple connecting rods, plug-in part can be inserted into plug-in space, and the side surface of plug-in part is connected with corresponding connecting rod to realize relative sliding with resistance, at least one connecting rod is provided with elastic abutment piece and is inserted into plug-in space, plug-in part can be abutted with elastic abutment piece, and extrude elastic abutment piece to make it be in energy storage state;Limiting piece, limiting piece is arranged on connecting piece, and limiting piece can be connected with plug-in part, to limit plug-in part moves in linear direction;Advantage is that the elastic abutment piece set on connecting rod can automatically exert clamping force on plug-in part during plugging process, so that it remains stable connection with plug-in part, prevent plug-in part from accidentally breaking away from plug-in space, to provide reliable connection stability under the premise of no additional locking operation.

Description

Technical Field

[0001] This utility model belongs to the field of welding equipment technology, and in particular relates to a quick-change pressure head assembly and a battery laser welding device. Background Technology

[0002] With the rapid development of the new energy vehicle industry, power batteries, as their core power source, have become a key focus of industry attention in terms of production efficiency and product quality. Among them, pouch batteries, due to their advantages such as high energy density, light weight, and flexible forming, have been widely used in the new energy vehicle field. In the assembly and production process of pouch batteries, the welding of the tabs and nickel sheets in the later stages of the process is one of the key steps, directly affecting the overall performance and safety of the battery.

[0003] Currently, in the laser welding process of tabs and nickel sheets, welding defects (such as incomplete welds, misaligned welds, and burn-through) are difficult to completely avoid, often requiring manual repair welding. Existing technologies typically use fixed clamping blocks to position and clamp the tabs or nickel sheets to assist laser welding. However, this type of structure has the following problems: firstly, the tab clamping block and the nickel sheet clamping block each occupy independent equipment, leading to a significant increase in equipment costs; secondly, even if a single piece of equipment is used, specialized personnel must use dedicated tools to disassemble and replace the clamping blocks, making the operation cumbersome and time-consuming. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a welding device that enables quick head replacement.

[0005] The objective of this utility model can be achieved through the following technical solution: a quick-change pressure head assembly, comprising:

[0006] Quick-change pressure head, which includes a plug-in portion;

[0007] A connector includes at least two fixedly arranged connecting rods, with multiple connecting rods forming a through insertion space. The insertion part can be inserted into the insertion space, and the side of the insertion part abuts against the corresponding connecting rod to achieve relative sliding. At least one connecting rod is provided with an elastic abutment extending into the insertion space. The insertion part can abut against the elastic abutment and compress the elastic abutment to put it into an energy storage state.

[0008] A limiting member is provided on the connector and can be connected to the insertion part to restrict the insertion part from moving in a straight direction.

[0009] In the aforementioned quick-change pressure head assembly, the limiting member includes at least two limiting plates arranged in a ring at intervals. A connecting rod is fixedly provided between two adjacent limiting plates. The limiting plates and the connecting rod together form a through insertion space. When the insertion part extends into the insertion space, the limiting plate abuts against the insertion part.

[0010] In the aforementioned quick-change pressure head assembly, the elastic abutment includes a ball plunger, the connecting rod is provided with a connecting groove with an opening, the ball plunger is disposed in the connecting groove, and at least a portion of the ball head of the ball plunger extends out of the connecting groove and into the insertion space.

[0011] In the aforementioned quick-change pressure head assembly, the side of the plug portion for abutting against the connecting rod is provided with an abutment groove. The abutment groove includes two abutment surfaces that are relatively inclined. When the plug portion is inserted into the plug space, the elastic abutment member abuts against the two abutment surfaces.

[0012] In the aforementioned quick-change pressure head assembly, the insertion end of the plug portion for contacting and connecting with the connecting rod is provided with a guide slope.

[0013] In the aforementioned quick-change pressure head assembly, the quick-change pressure head is provided with an adjusting abutment. The adjusting abutment includes an abutment end, which abuts against the connecting rod along the insertion direction of the plug-in part to limit the insertion distance of the plug-in part.

[0014] In the aforementioned quick-change pressure head assembly, connecting parts are fixedly provided on opposite sides of the insertion part, and the adjusting abutment part is an adjusting screw, which is threadedly connected to the connecting part.

[0015] In the aforementioned quick-change pressure head assembly, the outer surface of the insertion part is provided with a scale, and the limiting member or the connecting rod is provided with a reference reading part.

[0016] In the aforementioned quick-change pressure head assembly, a connection limiting part is fixedly provided on the connector, the connection limiting part including a limiting surface, the limiting surface being used to abut against the laser.

[0017] A battery laser welding apparatus includes the aforementioned quick-change pressure head assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) Multiple connecting rods form an insertion space. When the insertion part is inserted into the insertion space, it abuts against the connecting rod to achieve a sliding fit. The setting of the limiting part further ensures that the insertion part can only move in the set straight line direction, so that the quick-change pressure head can be quickly inserted or pulled out in the straight line direction, realizing efficient and convenient replacement operation. The elastic abutment on the connecting rod can automatically apply clamping force to the insertion part during the insertion process, so as to keep it stably connected with the insertion part and prevent the insertion part from accidentally disengaging from the insertion space, thereby providing reliable connection stability without additional locking operation.

[0020] (2) Only one laser welding equipment is needed. The quick-change pressure head for the tab and the quick-change pressure head for the nickel sheet can share one laser welding device. No professional personnel or special tools are required. The switching of multiple quick-change pressure heads can be completed by simple plugging and unplugging action, and the time for a single replacement is greatly shortened.

[0021] (3) The two abutting surfaces are inclined relative to each other. When the insertion part is inserted into the insertion space, it can abut against the two abutting surfaces at the same time, so that the elastic abutting part can contact more surface areas during the clamping process, thereby increasing the number of contact points. These additional contact points significantly improve the clamping force and friction of the overall structure, ensuring that the insertion part can be stably held in the predetermined position even under the action of external force. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection between one type of quick-change pressure head and connector;

[0023] Figure 2 yes Figure 1 One of the schematic diagrams of the cross-sectional structure;

[0024] Figure 3 This is a schematic diagram of another quick-change pressure head and connector;

[0025] Figure 4 yes Figure 1 A schematic diagram of the quick-change pressure head in the middle;

[0026] Figure 5 This is a three-dimensional structural diagram of the connector;

[0027] Figure 6 yes Figure 1 The second schematic diagram of the cross-sectional structure in the middle;

[0028] Figure 7 This is a schematic diagram showing the connection between the connector and the operating component;

[0029] Figure 8 This is a three-dimensional structural diagram of the connector.

[0030] In the diagram, 100 is the quick-change pressure head; 101 is the insertion part; 102 is the adjusting abutment part; 103 is the connecting part; 104 is the scale; 105 is the abutment groove; 106 is the abutment surface; 107 is the abutment end; 200 is the connector; 201 is the connecting rod; 202 is the insertion space; 203 is the elastic abutment part; 204 is the limiting plate; 205 is the operating part; 206 is the guide slope; 207 is the comparison part; 208 is the connecting limiting part; and 209 is the limiting surface. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] like Figures 1-8 As shown, a quick-change pressure head assembly includes:

[0034] Quick-change pressure head 100 includes a plug-in portion 101;

[0035] The connector 200 includes at least two fixedly arranged connecting rods 201, which together form a through insertion space 202. The insertion part 101 can be inserted into the insertion space 202, and the side of the insertion part 101 abuts against the corresponding connecting rod 201 to achieve relative sliding. At least one connecting rod 201 is provided with an elastic abutment 203 that extends into the insertion space 202. The insertion part 101 can abut against the elastic abutment 203, and the elastic abutment 203 is squeezed to put it in an energy storage state.

[0036] A limiting member is provided on the connector 200, and the limiting member 200 can be connected to the insertion part 101 to restrict the insertion part 101 from moving in a straight direction.

[0037] In this embodiment, a insertion space 202 is formed between multiple connecting rods 201. When the insertion part 101 extends into the insertion space 202, it abuts against the connecting rod 201 to achieve a sliding fit. The setting of the limiting member further ensures that the insertion part 101 can only move in a set linear direction, so that the quick-change pressure head 100 can be quickly inserted or pulled out in a linear direction, realizing efficient and convenient replacement operation. The elastic abutment member 203 provided on the connecting rod 201 can automatically apply clamping force to the insertion part 101 during the insertion process, so as to keep it stably connected to the insertion part 101 and prevent the insertion part 101 from accidentally disengaging from the insertion space 202, thereby providing reliable connection stability without additional locking operation.

[0038] The connector 200 is mounted on the battery laser welding equipment to accommodate various types of quick-change pressure heads 100, enabling rapid insertion, removal, and replacement operations. For example... Figure 1 As shown, when performing electrode welding, a quick-change pressure head 100 designed specifically for electrode welding is used. The insertion part 101 on the quick-change pressure head 100 is inserted into the insertion space 202 of the connector 200 and is automatically clamped and fixed by the elastic abutment 203 to ensure a stable and reliable connection.

[0039] When nickel sheet welding is required, simply pull out the quick-change pressure head 100 for electrode welding, as shown below. Figure 3 As shown, it can be replaced with a quick-change pressure head 100 specifically for nickel sheet welding. Since both quick-change pressure heads have the same insertion part 101 structure, they can be quickly inserted into the connector 200, and a clamping force is applied by the elastic abutment 203 to maintain a stable connection. This allows for flexible switching of quick-change pressure heads with different functions on the same laser welding equipment, without the need to replace the entire welding device or rely on specialized tools. Pressure head replacement can be completed simply by plugging and unplugging, significantly improving the equipment's versatility and operational efficiency.

[0040] Further defining the limiting component, the limiting component includes at least two limiting plates 204 arranged in a ring at intervals, and a connecting rod 201 is fixedly provided between two adjacent limiting plates 204. The limiting plates 204 and the connecting rod 201 together form a through insertion space 202. When the insertion part 101 extends into the insertion space 202, the limiting plate 204 abuts against the insertion part 101.

[0041] In this embodiment, the structural design not only guides and supports the movement path of the insertion part 101, but also effectively prevents it from rotating or shifting laterally during use, significantly improving the connection stability and positioning accuracy of the quick-change assembly. Simultaneously, the annularly distributed limiting plates 204 ensure more uniform force distribution, enhancing the overall structure's load-bearing capacity and resistance to eccentric loads.

[0042] like Figure 1As shown, as an optional solution, there are two limiting plates 204, and the two limiting plates 204 are arranged opposite each other. The connecting rods 201 between the two adjacent limiting plates 204 are provided with elastic abutment members 203.

[0043] Further specifying, the elastic abutment member 203 includes a ball-head plunger, and the connecting rod 201 is provided with a connecting groove with an opening. At least a portion of the ball head of the ball-head plunger extends out of the connecting groove and into the insertion space 202. When the insertion part 101 of the quick-change pressure head 100 is inserted into the insertion space 202, the ball head portion of the ball-head plunger contacts the surface of the insertion part 101 and is compressed back into the connecting groove, generating a certain elastic abutment force.

[0044] The ball plunger is threadedly connected to the connecting rod 201 via its plunger portion. This design allows the ball plunger to precisely adjust its insertion depth into the insertion space 202 according to actual needs, thus adapting to the insertion parts 101 of different sizes of quick-change pressure heads 100. Furthermore, the ball plunger is equipped with a detachable operating component 205 (which can be a handle, handwheel, or other operating tools), allowing users to choose whether to install it based on their actual needs. The operating end of the operating component 205 extends outside the insertion space 202, enabling operators to adjust or lock the ball plunger without disassembling the entire quick-change assembly, greatly improving assembly and maintenance efficiency.

[0045] Preferably, the side of the plug-in part 101 that abuts against the connecting rod 201 is provided with an abutment groove 105. The abutment groove 105 includes two abutment surfaces 106 that are arranged at opposite inclinations. When the plug-in part 101 is inserted into the plug-in space 202, the elastic abutment member 203 abuts against the two abutment surfaces 106.

[0046] like Figure 4 and Figure 6 As shown, the two abutment surfaces 106 are arranged at an angle to each other. When the insertion part 101 is inserted into the insertion space 202, it can simultaneously abut against both abutment surfaces 106, allowing the elastic abutment member 203 to contact more surface areas during clamping, thereby increasing the number of contact points. These additional contact points significantly improve the clamping force and friction of the overall structure, ensuring that the insertion part 101 can be stably held in the predetermined position even under external force.

[0047] For a ball-head plunger, its ball head surface is an arc-shaped surface, and the presence of the contact surface 106 allows the arc-shaped spherical surface of the ball-head plunger to make effective contact with two planes at the same time.

[0048] Preferably, the insertion end of the plug-in part 101, which is used to abut against the connecting rod 201, is provided with a guide slope 206. This guide slope 206 plays a good guiding role during the insertion process. When the plug-in part 101 is inserted into the plug-in space 202 in a straight direction, the guide slope 206 first contacts the connecting rod 201, and automatically guides the plug-in part 101 into the correct insertion path through the slope structure, effectively avoiding problems such as jamming or insertion difficulties caused by initial alignment deviations.

[0049] Preferably, the quick-change pressure head 100 is provided with an adjusting abutment part 102, which includes an abutment end 107. Along the insertion direction of the plug-in part 101, the abutment end 107 can abut against the connecting rod 201 to limit the insertion distance of the plug-in part 101.

[0050] In this embodiment, when the insertion part 101 is inserted into the insertion space 202 of the connector 200 in a set direction, the abutment end 107 can contact the connecting rod 201 and exert a limiting effect, thereby effectively controlling the insertion depth of the insertion part 101, ensuring the accuracy of the pressure head installation position after each replacement, and improving the repeatability of the overall assembly. In addition, adjusting the setting of the abutment part 102 also has the function of preventing the insertion part 101 from being over-inserted, avoiding internal structural interference or damage caused by excessive insertion, and improving the safety and service life of the component.

[0051] Further, connecting parts 103 are fixedly provided on opposite sides of the plug-in part 101, and the adjusting abutment part 102 is an adjusting screw, which is threadedly connected to the connecting part 103.

[0052] In this embodiment, the adjusting screw is installed in conjunction with the connecting part 103 via a threaded connection, allowing the extension distance of its abutting end to be precisely adjusted according to actual needs. Users can adjust the position of the abutting end relative to the insertion part 101 by rotating the adjusting screw, thereby flexibly controlling the insertion depth of the insertion part 101 into the connector 200. This allows for fine-tuning of the insertion depth according to different application scenarios or pressure head specifications, improving the versatility and adaptability of the component.

[0053] It is worth mentioning that a nut is also screwed onto the adjusting screw to lock the relative position of the adjusting screw on the connecting part 103, so as to prevent the adjusting screw from rotating and causing the insertion distance of the plug part 101 to change.

[0054] Preferably, the outer surface of the insertion part 101 is provided with a scale 104, and the limiting member and / or the connecting rod 201 is provided with a reference reading part 207. When the insertion distance of the insertion part 101 is adjustable by adjusting the abutment part 102, the presence of the scale 104 and the reference reading part 207 can provide intuitive visual feedback on the insertion depth of the quick-change pressure head 100, allowing the operator to more accurately control the insertion distance of the insertion part 101.

[0055] It is worth mentioning that, such as Figure 1 As shown, as an optional solution, the reference reading section 207 is the lower end face of the limiting plate 204. When the insertion part 101 is inserted into the insertion space 202 of the connector 200 in a straight direction, the scale 104 on its outer surface corresponds and engages with the lower end face of the limiting plate 204. By observing the value on the corresponding scale 104 on the lower end face of the limiting plate 204, the operator can quickly determine the insertion depth of the insertion part 101 and ensure that the installation position of the pressure head remains consistent after each replacement. By using the limiting plate 204 itself as the reference reading section 207, no additional parts are required, simplifying the overall structure.

[0056] like Figure 8 As shown, preferably, a connection limiting part 208 is fixedly provided on the connector 200. The connection limiting part 208 includes a limiting surface 209. When the connector 200 is connected to the laser, the limiting surface 209 contacts the corresponding part of the laser and forms a hard limiting fit, thereby effectively limiting the relative position between the connector 200 and the laser, ensuring the installation accuracy and connection consistency between the two. Moreover, the limiting surface 209 provides a reliable support reference for the connector 200, preventing it from loosening or shifting due to vibration or external force during use, thus improving the overall system's operational stability and safety.

[0057] A battery laser welding device includes the aforementioned quick-change pressure head assembly, a connector 200 fixedly connected to a laser in the laser welding device, and a limiting surface 209 abutting against the side of the laser to achieve hard limiting.

[0058] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0059] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0060] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A quick-change pressure head assembly, characterized in that, include: Quick-change pressure head, which includes a plug-in portion; A connector includes at least two fixedly arranged connecting rods, with multiple connecting rods forming a through insertion space. The insertion part can be inserted into the insertion space, and the side of the insertion part abuts against the corresponding connecting rod to achieve relative sliding. At least one connecting rod is provided with an elastic abutment extending into the insertion space. The insertion part can abut against the elastic abutment and compress the elastic abutment to put it into an energy storage state. A limiting member is provided on the connector and can be connected to the insertion part to restrict the insertion part from moving in a straight direction.

2. The quick-change pressure head assembly according to claim 1, characterized in that, The limiting component includes at least two limiting plates arranged in a ring at intervals. A connecting rod is fixedly provided between two adjacent limiting plates. The limiting plates and the connecting rod together form a through insertion space. When the insertion part extends into the insertion space, the limiting plate abuts against the insertion part.

3. The quick-change pressure head assembly according to claim 1, characterized in that, The elastic abutment includes a ball-head plunger, the connecting rod is provided with a connecting groove with an opening, the ball-head plunger is disposed in the connecting groove, and at least a portion of the ball head of the ball-head plunger extends out of the connecting groove and into the insertion space.

4. A quick-change pressure head assembly according to claim 1 or 3, characterized in that, The plug part has an abutment groove on its side for abutting the connecting rod. The abutment groove includes two abutment surfaces that are inclined to each other. When the plug part is inserted into the plug space, the elastic abutment member abuts against the two abutment surfaces.

5. A quick-change pressure head assembly according to claim 1, characterized in that, The insertion end of the plug-in part, which is used to make contact with the connecting rod, is provided with a guide slope.

6. A quick-change pressure head assembly according to claim 1, characterized in that, The quick-change pressure head is provided with an adjusting abutment, which includes an abutment end. Along the insertion direction of the plug-in part, the abutment end can abut against the connecting rod to limit the insertion distance of the plug-in part.

7. A quick-change pressure head assembly according to claim 6, characterized in that, Connecting parts are fixedly provided on opposite sides of the plug-in part, and the adjusting abutting part is an adjusting screw, which is threadedly connected to the connecting part.

8. A quick-change pressure head assembly according to claim 1, characterized in that, The outer surface of the plug is provided with a scale, and the limiting member or the connecting rod is provided with a reference reading part.

9. A quick-change pressure head assembly according to claim 1, characterized in that, A connection limiting part is fixedly provided on the connector, and the connection limiting part includes a limiting surface, which is used to abut against the laser.

10. A battery laser welding apparatus, characterized in that, Includes the quick-change pressure head assembly as described in any one of claims 1-9 above.

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