A welding needle clamp
By designing a welding needle clamping fixture, the welding needle top contact pressure block drives the clamping jaws to clamp, solving the problems of welding needle overheating and inaccurate contact during the welding process, thus achieving efficient welding and extending the life of the welding needle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MIANYANG CHUANGMING INTELLIGENT BATTERY CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-02
AI Technical Summary
In the existing technology, the welding of cylindrical batteries with full collector/current collector structure has problems such as severe heat generation and rapid wear of the clamping welding pins. The pre-insertion type cannot guarantee the accuracy of the contact between the welding pin and the current collector, which is prone to sparking and incomplete welding, resulting in a high defect rate.
Design a welding needle clamping fixture. The welding needle is pre-inserted and connected to the pressure block, which drives the pressure block to rise and move, and closes the jaws to clamp the welding needle to achieve welding. The fixture not only ensures that the welding needle is perpendicular to the collector plate and makes accurate contact, but also allows heat dissipation on the production line, thus extending the life of the welding needle.
It effectively avoids the phenomenon of sparking and incomplete welding, extends the service life of welding needles, and improves the accuracy and yield of welding.
Smart Images
Figure CN224309804U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of welding equipment technology, and specifically relates to a welding needle clamping fixture. Background Technology
[0002] Lithium-ion cylindrical batteries have gradually become the mainstream product in the new energy industry due to their advantages such as high energy density, high charge / discharge rate, and good capacity consistency. Among them, the full-ear / current collector structure is increasingly being chosen as the preferred cylindrical battery structure by manufacturers. However, cylindrical batteries with the full-ear / current collector structure present technological challenges during welding. Currently, production lines mainly use two resistance welding methods: "clamped welding pin" and "pre-insertion pin". The clamped welding pin method offers accurate welding and a high yield rate, but due to the high production frequency, the clamped welding pins suffer from severe heat generation and rapid wear. The pre-insertion pin method, which uses multiple welding pins in rotation, can effectively dissipate heat and has a long service life, but it cannot guarantee the accuracy of contact between the welding pin and the current collector, making it prone to sparking and incomplete soldering, resulting in a higher defect rate. Utility Model Content
[0003] To address the shortcomings of the existing technology, this utility model provides a welding needle clamping fixture. This fixture uses a pre-inserted welding needle to abut against a pressure block, which moves the pressure block upwards, thereby causing the jaws to close and clamp the welding needle for welding. The use of this fixture has the advantages of both the clamping-type processing, ensuring that the welding needle is perpendicular to the bottom collector plate and makes accurate contact with the collector plate, avoiding spalling and incomplete welding, and the pre-inserted needle processing, which allows multiple welding needles to circulate and dissipate heat on the production line, avoiding the problem of overheating and rapid wear of welding needles, and effectively extending the life of the welding needles.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A welding pin clamping fixture, comprising:
[0006] The pressure head is connected to the welding equipment on one side, and multiple gripper seats are provided on the plane of the other side, with the multiple gripper seats being evenly distributed circumferentially.
[0007] Multiple grippers are mounted one-to-one on the gripper base, with one end of each gripper movably connected to the gripper base and the other end free.
[0008] The pressure block is located on the other side of the pressure head and is suspended between the multiple gripper seats and grippers;
[0009] Multiple connecting arms are provided, and each of the multiple connecting arms is correspondingly arranged with a multiple of the grippers. One end of each connecting arm is movably connected to the middle of the gripper, and the other end is connected to the pressure block.
[0010] The pressing block moves towards the pressing head, which can cause the other ends of all the grippers to move closer together to clamp; the pressing block moves away from the pressing head, which can cause the other ends of all the grippers to move away from each other to release the clamp.
[0011] In one embodiment of this application, the gripper seat, gripper, and connecting arm each include at least three.
[0012] In one embodiment of this application, the gripper and the gripper seat are movably connected via a ball joint.
[0013] In one embodiment of this application, the connecting arm and the gripper are hinged.
[0014] In one embodiment of this application, the pressure block is a circular block, and the connecting arm is connected to the pressure block via a connecting shaft, wherein the connecting arm and the connecting shaft are connected by a limiting hinge.
[0015] In one embodiment of this application, the pressure block is a circular block, the connecting arm is connected to the pressure block via a connecting shaft, one end of the connecting shaft is fixedly connected to the connecting arm, the other end is slidably connected to the pressure block, and the connecting shaft slides radially along the pressure block.
[0016] In one embodiment of this application, the pressure block is a counterweight block, which can use gravity to move the other ends of all the grippers away from each other and release the gripping.
[0017] In one embodiment of this application, a trigger switch is also included. The trigger switch is disposed on the other side of the pressure head and cooperates with the pressure block. It is triggered when the pressure block approaches.
[0018] In one embodiment of this application, the trigger switch is a signal switch, which is connected to the welding equipment and sends a trigger signal to the welding equipment;
[0019] Alternatively, the trigger switch is a circuit switch connected to the welding equipment, and the pressure block is provided with a conductive element, one end of which is connected to the trigger switch and the other end of which is connected to the clamped welding needle.
[0020] In one embodiment of this application, the clamp is vertically arranged, the pressure block is located directly below the pressure head, and the center of the circumference of the plurality of grippers and the axis of the pressure block coincide with the direction of gravity.
[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0022] This utility model's welding needle clamping fixture can be driven by a pre-inserted welding needle abutting a pressure block, which in turn moves the pressure block upwards, causing the clamping jaws to close and clamp the welding needle before welding. The use of this fixture has the advantages of both the clamping-type processing, ensuring that the welding needle is perpendicular to the bottom collector plate and makes accurate contact with the collector plate, avoiding spatter and incomplete welding, and the pre-inserted-pin processing, which allows multiple welding needles to circulate and dissipate heat on the production line, avoiding the problem of overheating and rapid wear of the welding needles, and effectively extending the life of the welding needles. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this application or 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a front view schematic diagram of the welding needle clamping fixture.
[0025] Figure 2 This is a bottom view schematic diagram of the welding needle clamping fixture.
[0026] Figure 3 Schematic diagram of the three-dimensional structure of the welding needle clamp. Figure 1 .
[0027] Figure 4 Schematic diagram of the three-dimensional structure of the welding needle clamp. Figure 2 .
[0028] Figure 5 This is a schematic diagram of the structure of the welding needle clamping fixture when holding the welding needle.
[0029] Figure label:
[0030] 1. Pressure head; 11. Gripper seat;
[0031] 2. Clamping jaws; 21. Ball joint;
[0032] 3. Pressing blocks;
[0033] 4. Connecting arm; 41. Connecting shaft;
[0034] 5. Welding needles. Detailed Implementation
[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.
[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0041] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0042] like Figures 1 to 5As shown, this utility model embodiment provides a welding needle clamping fixture, which includes a pressure head 1, a plurality of jaw seats 11 disposed on the pressure head 1, a plurality of jaws 11 mounted on the jaw seats 11, a pressure block 3, and a plurality of connecting arms 4 connecting the pressure block 3 and the jaws 2, etc.
[0043] The pressure head 1 is a circular block with a connecting part on one side for connecting welding equipment such as a welding machine; multiple gripper seats 11 are provided on the plane of the other side, and the multiple gripper seats 11 are evenly distributed around the circumference. Preferably, the center of the multiple gripper seats 11 is coincident with the center of the pressure head.
[0044] Multiple grippers 2 are mounted one-to-one on multiple gripper seats 11. One end of each gripper 2 is movably connected to the gripper seat 11, and the other end is a free end. The free ends of the multiple grippers 2 can be closed together to clamp the welding needle 5. The free ends of the multiple grippers 2 can cooperate with each other and are adapted to the size and shape of the welding needle 5.
[0045] The pressure block 3 is located on the side of the pressure head 1 where the gripper seat 11 is provided. The projected size of the pressure block 3 is smaller than the projected size of the pressure head 1 and smaller than the size of the circle in which the multiple gripper seats 11 are distributed. The pressure block 3 is suspended between the multiple gripper seats 11 and the gripper 2.
[0046] Multiple connecting arms 4 are arranged in a one-to-one correspondence with multiple grippers 2. One end of the connecting arm 4 is movably connected to the middle of the gripper 2, and the other end is connected to the pressure block 3.
[0047] When the pressure block 3 is subjected to force and moves towards the pressure head 1, it can drive the other ends (i.e., the free ends) of all the grippers 2 to close together and clamp them through the connecting arm 4. When the pressure block 3 moves away from the pressure head 1, it can drive the other ends (i.e., the free ends) of all the grippers 2 to move away from each other through the connecting arm 4, thereby opening and releasing the clamp.
[0048] In use, the core roll flows on the production line, and welding needles 5 are pre-inserted into the core roll. When the core roll and welding needles 5 flow to the welding position (located directly below the welding needle clamping fixture), the core roll is lifted by the production line mechanism, the welding needles 5 contact the pressure block 3, which drives the pressure block 3 to rise. The pressure block 3 drives the connecting arm 4, which in turn drives the gripper 2 to close and clamp the welding needles 5. At the same time, the pressure head 1 descends to the designated position, triggering the welding signal to perform welding. After welding is completed, the welding equipment drives the fixture to rise, while the core roll and welding needles 5 descend. The pressure block 3 loses the top contact of the welding needles 5, the pressure block 3 moves downward, and the gripper 2 separates and contacts each other for clamping.
[0049] Furthermore, the number of gripper bases 11, grippers 2, and connecting arms 4 are equal, each including at least 3, such as 3, 4, or 5. Preferably, there are 3 gripper bases 11, grippers 2, and connecting arms 4, evenly distributed circumferentially, which can cooperate well for clamping and reduce mutual interference.
[0050] In one embodiment, the end of the gripper 2 is movably connected to the gripper seat 11 via a ball joint 21. Specifically, the gripper seat 11 is provided with a spherical mounting hole, and the end of the gripper 2 is provided with a spherical shaft head, which is adapted to be installed in the spherical mounting hole and can rotate omnidirectionally within the spherical mounting hole. The gripper 2 is connected to the gripper seat 11 via the ball joint 21, so that the gripper 2 can be adjusted omnidirectionally relative to the gripper seat 11, making the movement of the gripper 2 more flexible.
[0051] The end of the connecting arm 4 is hinged to the middle of the gripper 2, such as by means of a pin or bolt.
[0052] In one embodiment, the pressure block 3 is a circular block, coaxially arranged with the center of the pressure head 1 and the multiple gripper seats 11 arranged circumferentially. The other end of the connecting arm 4 is connected to the pressure block 3 via a connecting shaft 41. The connecting shaft 41 is fixedly connected to the pressure block 3 or integrally formed. The end of the connecting arm 4 is connected to the end of the connecting shaft 41 by a limiting hinge. The connecting arm 4 can rotate within a certain range relative to the connecting shaft 41, so as to realize that the gripper 2 moves closer together to clamp and separate to release clamping by the up and down movement of the pressure block 3.
[0053] In another embodiment, the pressure block 3 is a circular block, coaxially arranged with the center of the pressure head 1 and the multiple gripper seats 11 arranged circumferentially. The other end of the connecting arm 4 is connected to the pressure block 3 via a connecting shaft 41. One end of the connecting shaft 41 is fixedly connected to the connecting arm 4, or the connecting shaft 41 and the connecting arm 4 are integrally formed; the other end of the connecting shaft 41 is slidably connected to the pressure block 3, and the sliding direction of the connecting shaft 41 coincides with the radial direction of the pressure block 3, that is, the connecting shaft 41 can slide along the radial direction of the pressure block 3. The connecting arm 4 is slidably connected to the pressure block 3 along the radial direction via the connecting shaft 41, and the relative distance between the upper ends of the multiple connecting arms 4 can be adjusted to realize that the gripper 2 moves closer together to clamp and separate to release clamping by the up and down movement of the pressure block 3.
[0054] Preferably, the clamp is vertically positioned. During use, the pressure block 3 is located directly below the pressure head 1, and the center of the circumference of the multiple grippers 2 coincides with the axis of the pressure block 3 and the direction of gravity. This vertical clamping configuration allows for better automatic opening of the grippers 2 using the gravity of the pressure block 3, and ensures accurate clamping when the welding needle 5 is engaged, guaranteeing that the welding needle 5 is perpendicular to the bottom collector plate and ensuring welding quality.
[0055] Furthermore, the pressure block 3 is set as a counterweight. When there is no welding pin 5 pressing against the pressure block 3, the other end (i.e. the lower end) of all the grippers 2 can be driven away from each other by the weight of the pressure block 3 itself to release the gripper, thereby realizing the automatic separation of the grippers 2 and ensuring that the fixture can be used continuously and efficiently.
[0056] In one embodiment, the fixture further includes a trigger switch (not shown in the figure), which is disposed on the side of the pressure head 1 facing the pressure block 3, and cooperates with the pressure block 3 to be triggered by the pressure block 3 approaching and deactivated by the pressure block 3 moving away.
[0057] In a further embodiment, the trigger switch is a signal switch, such as a distance sensor switch or a pressure sensor switch. The trigger switch is electrically connected to the welding equipment and can send a trigger signal to the welding equipment. When the pressure block 3 is detected to approach a set position (at which position the gripper 2 clamps the welding needle 5), the trigger switch sends a trigger signal to the welding equipment, and the welding equipment connects to the welding needle 5 for welding. When the pressure block 3 is detected to move away from the set position, the trigger switch sends a release signal to the welding equipment.
[0058] In a further embodiment, the trigger switch is a circuit switch, such as a circuit connection port; the trigger switch is connected to the welding equipment. The pressure block 3 is provided with a conductive element (not shown in the figure), one end (upper end) of which corresponds to the position of the trigger switch, and the other end (lower end) corresponds to the position of the clamped welding needle 5. When the welding needle 5 pushes upward against the pressure block 3, and the pressure head 1 presses down into place, the upper end of the conductive element on the pressure block 3 connects to the trigger switch, and the lower end abuts against the welding needle 5. At this time, the welding equipment connects to the welding needle 5, and welding can be performed.
[0059] The welding needle clamping fixture of this application can be driven by the pre-inserted welding needle 5 touching the pressure block 3, which in turn drives the pressure block 3 to move upward, thereby causing the clamping claw 2 to close and clamp the welding needle 5, and then welding is performed. The use of this fixture has the advantages of the welding needle clamping processing, which ensures that the welding needle 5 is perpendicular to the bottom collector plate and makes accurate contact with the collector plate, avoiding the phenomenon of splattering and incomplete welding. It also has the advantages of the pre-inserted needle processing, which enables multiple welding needles to circulate and dissipate heat on the production line, avoiding the problem of overheating and rapid wear of welding needles, and can effectively extend the life of welding needle 5.
Claims
1. A welding needle clamping fixture, characterized in that, include: The pressure head (1) is connected to the welding equipment on one side, and multiple gripper seats (11) are provided on the plane of the other side. The multiple gripper seats (11) are evenly distributed around the periphery. Multiple grippers (2) are installed one-to-one on the gripper seat (11). One end of each gripper (2) is movably connected to the gripper seat (11), and the other end is free. The pressure block (3) is located on the other side of the pressure head (1) and is suspended between the multiple gripper seats (11) and grippers (2); Multiple connecting arms (4) are provided one-to-one with multiple grippers (2). One end of each connecting arm (4) is movably connected to the middle of the gripper (2), and the other end is connected to the pressure block (3). The pressing block (3) moves toward the pressing head (1), which can cause the other ends of all the grippers (2) to move closer to each other for clamping; the pressing block (3) moves away from the pressing head (1), which can cause the other ends of all the grippers (2) to move away from each other to release the clamping.
2. The welding needle clamping fixture according to claim 1, characterized in that, The gripper seat (11), gripper (2) and connecting arm (4) each include at least 3.
3. The welding needle clamping fixture according to claim 1 or 2, characterized in that, The gripper (2) and the gripper seat (11) are movably connected via a ball joint (21).
4. The welding needle clamping fixture according to claim 3, characterized in that, The connecting arm (4) and the gripper (2) are hinged.
5. The welding needle clamping fixture according to claim 4, characterized in that, The pressure block (3) is a circular block, and the connecting arm (4) is connected to the pressure block (3) via the connecting shaft (41). The connecting arm (4) and the connecting shaft (41) are connected by a limiting hinge.
6. The welding needle clamping fixture according to claim 4, characterized in that, The pressure block (3) is a circular block. The connecting arm (4) is connected to the pressure block (3) via a connecting shaft (41). One end of the connecting shaft (41) is fixedly connected to the connecting arm (4), and the other end is slidably connected to the pressure block (3). The connecting shaft (41) slides along the radial direction of the pressure block (3).
7. The welding needle clamping fixture according to claim 1, characterized in that, The pressure block (3) is a counterweight block, which can drive the other ends of all the grippers (2) away from each other and release the gripping force through gravity.
8. The welding needle clamping fixture according to claim 1, characterized in that, It also includes a trigger switch, which is located on the other side of the pressure head (1) and cooperates with the pressure block (3) to be triggered when the pressure block (3) approaches.
9. The welding needle clamping fixture according to claim 8, characterized in that, The trigger switch is a signal switch, which is connected to the welding equipment and sends a trigger signal to the welding equipment; Alternatively, the trigger switch is a circuit switch connected to the welding equipment. The pressure block (3) is provided with a conductive element. One end of the conductive element is connected to the trigger switch, and the other end is connected to the clamped welding needle (5).
10. The welding needle clamping fixture according to claim 5 or 6, characterized in that, The clamp is set vertically, with the pressure block (3) located directly below the pressure head (1). The center of the circumference of the multiple grippers (2) and the axis of the pressure block (3) coincide with the direction of gravity.