A new energy vehicle battery tray flexible welding fixture

Abstract

This invention relates to the field of battery tray welding facilities, and specifically discloses a flexible welding fixture for new energy vehicle battery trays. It includes a fixture base and a flexible positioning component, an adaptive clamping component, an angle adjustment mechanism, and a control system. The fixture base has a rotating internal gear plate driven by a rotary drive component, and a positioning structure is provided between the rotating internal gear plate and the fixture base. The flexible positioning component can simultaneously adjust the position, angle, and height of multiple positioning posts to adapt to battery trays of different specifications. The adaptive clamping component achieves flexible clamping, avoiding damage to the trays while ensuring a secure clamping. The angle adjustment mechanism can simultaneously adjust and lock the welding angles of multiple battery trays. The control system achieves coordinated and automated control of all components. This invention has strong versatility, precise positioning, and reliable clamping, enabling simultaneous welding of multiple battery trays, significantly improving welding accuracy and production efficiency, reducing welding defect rates, and is suitable for batch welding operations of new energy vehicle battery trays.

Description

Technical Field

[0001] This invention relates to the field of battery tray welding facilities technology, and in particular to a flexible welding fixture for new energy vehicle battery trays. Background Technology

[0002] The battery tray in a new energy vehicle is a core load-bearing component of the battery pack, and its structural stability and dimensional accuracy directly affect the installation reliability and operational safety of the battery pack. Battery trays are mostly made of lightweight materials such as aluminum alloys and typically require welding to assemble multiple components. During the welding process, the positioning accuracy and clamping stability of the tray are key factors determining the welding quality.

[0003] Currently, most existing welding fixtures for new energy vehicle battery trays are dedicated fixtures, meaning that one fixture is only suitable for one type of battery tray, resulting in poor versatility. With the diversification of new energy vehicle models, the size, outline, and welding angle of battery trays also present diverse requirements. Dedicated fixtures need to be changed frequently, which not only increases equipment investment costs but also leads to low production efficiency. Furthermore, positioning deviations can easily occur during fixture switching, affecting welding accuracy.

[0004] Meanwhile, existing fixtures have significant defects in their positioning and clamping structures: the positioning components are mostly fixed structures, unable to flexibly adjust the positioning position and angle according to the tray specifications; the clamping components are mostly rigid clamps, easily causing pressure damage to the surface of the battery tray, and unable to adapt to subtle changes in the tray contour, resulting in insecure clamping. This leads to problems such as tray displacement and deformation during welding, thus affecting welding quality. In addition, the angle adjustment function of existing fixtures is imperfect, and the locking after adjustment is not secure, making it prone to angle displacement during welding and unable to meet the needs of multi-angle welding.

[0005] Furthermore, existing fixtures can only perform welding operations on a single battery tray, which cannot meet the needs of simultaneous welding of multiple battery trays in mass production, making it difficult to further improve production efficiency. Therefore, developing a flexible welding fixture for new energy vehicle battery trays has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this invention provides a flexible welding fixture for new energy vehicle battery trays that is highly versatile, has precise positioning, reliable clamping, adjustable angle, and can simultaneously perform welding of multiple battery trays.

[0007] This invention is achieved through the following technical solution: A flexible welding fixture for a new energy vehicle battery tray includes a fixture base and a flexible positioning component, an adaptive clamping component, an angle adjustment mechanism, and a control system mounted on the fixture base; The angle adjustment mechanism is mounted on the fixture base and is driven by a rotary drive component to rotate the internal gear plate. The rotary drive component is installed inside the fixture base, and its output end is connected to the internal gear plate for transmission. It is used to drive the internal gear plate to rotate, thereby driving the external gear cylinder, rotating plate and battery tray to rotate synchronously, realizing synchronous angle adjustment of multiple battery trays and ensuring that the welding angle of multiple battery trays is consistent. A positioning structure is provided between the internal gear plate and the fixture base. The positioning structure is used to ensure that the internal gear plate is fixed after it rotates to the correct position, so as to ensure the stability of the battery tray during welding operations. The flexible positioning assembly includes multiple sets of double tracks fixed on the clamp base and located above the rotating inner gear plate. The double tracks are radially distributed around the center of the rotating inner gear plate, enabling synchronous positioning of the battery tray. A sliding plate slides on each double track, and a rotating plate is mounted on the sliding plate. A positioning post is mounted on the rotating plate and inserted into the positioning hole of the battery tray for precise positioning. An external gear cylinder with a rotating shaft is located on the lower inner surface of each double track. The external gear cylinder meshes with the rotating inner gear plate. Matching splines and spline grooves are provided between the rotating plate and the external gear cylinder, ensuring synchronous rotation of the rotating plate and the external gear cylinder, and also ensuring separation between the rotating plate and the external gear cylinder. Each sliding plate is equipped with a matching push-pull device, which drives all sliding plates to slide synchronously along the corresponding double track, facilitating the replacement of battery trays of different sizes. The adaptive clamping assembly includes clamping brackets symmetrically arranged on both sides of the rotating internal gear plate, a clamping drive, and several flexible clamping blocks, enabling synchronous clamping of multiple battery trays. The clamping brackets are fixed to the fixture base, providing mounting support for the clamping drive. The clamping drive is mounted on the clamping brackets. The flexible clamping blocks are connected to the output end of the clamping drive via radially distributed support rods. The radially arranged support rods ensure uniform force distribution on the flexible clamping blocks, preventing excessive local pressure. The lower surface of the flexible clamping blocks is provided with arc-shaped grooves that conform to the contour of the battery trays. Each external gear cylinder is equipped with an arc-shaped groove above it, ensuring that the flexible clamping blocks fit tightly against the surface of the battery trays and improving clamping stability. The control system is electrically connected to the rotary drive, clamping drive and push-pull device respectively, and is used to control the coordinated work of each component. It can realize the synchronous control of positioning, clamping and angle adjustment of multiple battery trays, adapt to the needs of simultaneous construction and welding of multiple battery trays in mass production, and realize automated batch welding.

[0008] The positioning structure includes: an annular locking groove on the fixture base; a locking block on the lower surface of the rotating internal gear plate; a locking bolt threaded onto the locking block; and the locking bolt passing through the locking block and contacting the bottom of the annular locking groove. After the angle is adjusted to the correct position, the locking bolt is tightened, causing the end of the locking bolt to abut tightly against the bottom of the annular locking groove. This friction locks the rotating internal gear plate, preventing it from rotating during welding and ensuring a stable welding angle.

[0009] The inner wall of the arc-shaped groove is provided with an elastic anti-slip layer. The elastic anti-slip layer can increase the friction between the flexible clamping block and the battery tray, improve the clamping reliability, and at the same time avoid rigid contact from causing pressure damage to the surface of the battery tray.

[0010] The elastic anti-slip layer is detachably connected to the arc-shaped groove via Velcro, facilitating its replacement and maintenance. The elastic anti-slip layer is made of nitrile rubber, which has good elasticity, wear resistance, and oil resistance, making it suitable for battery tray processing environments. With a thickness of 2-5mm, it ensures both sufficient cushioning performance and clamping stability.

[0011] A position sensor is installed at the top of the positioning post. The position sensor is used to detect whether the positioning post is accurately inserted into the positioning hole of the battery tray and to provide feedback on whether the positioning is in place. A pressure sensor is embedded in the elastic anti-slip layer. The pressure sensor is used to detect the clamping force of the flexible clamping block on the battery tray and to provide real-time feedback on the clamping status. The control system automatically adjusts the working status of the push-pull device and the clamping drive based on the sensor feedback signal to ensure accurate positioning and appropriate clamping force, and to avoid positioning deviation or over / under clamping. The position sensor and the pressure sensor are electrically connected to the control system, and a switch is installed in the connection line between the pressure sensor and the control system.

[0012] The top of the positioning post is equipped with a flexible buffer pad, which can buffer the contact impact between the positioning post and the battery tray, avoid damage to the battery tray, and improve the fit of the positioning.

[0013] The flexible buffer pad is made of silicone, which has good flexibility, high temperature resistance and wear resistance, and is suitable for welding environment. The thickness is 3-8mm. The surface of the flexible buffer pad is provided with anti-slip texture, which can further improve the stability of positioning and prevent the battery tray from sliding during positioning.

[0014] The clamping drive component is a hollow piston rod hydraulic cylinder. Compared with the traditional solid piston rod hydraulic cylinder, the hollow piston rod hydraulic cylinder is lighter and has sufficient strength to meet the clamping force requirements.

[0015] The push-pull device includes: a mounting column installed on a clamping bracket and passing through a clamping drive component; a push-pull cylinder is fixedly mounted at the lower end of the mounting column; several push-pull rods are hinged to the output end of the push-pull cylinder; the lower ends of the push-pull rods are hinged to sliding plates; a limiting ring is also fitted on the extension and retraction trajectory of the output end of the push-pull cylinder to facilitate the retraction of the push-pull rods; the push-pull cylinder synchronously drives all sliding plates to slide along corresponding double tracks through the push-pull rods, realizing the key connection between all rotating plates and the external gear cylinder, so that the rotating plates rotate synchronously with the external gear cylinder; the limiting ring can limit the retraction trajectory of the push-pull rods to prevent the push-pull rods from deviating during the retraction process, ensuring the working stability of the push-pull device.

[0016] The adaptive clamping assembly also includes a buffer spring, which is sleeved on the output end of the clamping drive. One end of the buffer spring is fixedly connected to the clamping bracket, and the other end is fixedly connected to the output end of the clamping drive. The buffer spring can buffer the driving force of the clamping drive to avoid damage to the battery tray caused by excessive clamping force in an instant. At the same time, it can adapt to the slight changes in the outline of the battery tray to ensure the flexibility and reliability of the clamping process.

[0017] The beneficial effects of this invention are: This invention uses a push-pull device of a flexible positioning component to drive a sliding plate to slide along a double track, which can adjust the position of the rotating plate so that the rotating plate and the outer gear cylinder can be keyed together and rotate synchronously. At the same time, the rotating inner gear plate meshes with the outer gear cylinder, driving the rotating plate and the positioning column to rotate. Multiple sets of double tracks and flexible clamping blocks are arranged in a ring, which can realize the simultaneous construction and welding of multiple battery trays without frequent clamp changes, greatly reducing equipment investment costs and improving mass production efficiency.

[0018] The flexible buffer pad at the top of the positioning column of the present invention can avoid positioning damage, the position sensor can detect the positioning status in real time and provide feedback on whether the positioning is in place, and the control system can automatically adjust according to the feedback signal to ensure positioning accuracy; at the same time, the positioning structure between the rotating internal tooth plate and the fixture base can ensure stable positioning after angle adjustment, avoid displacement during welding, and further improve positioning reliability.

[0019] The adaptive clamping assembly of this invention features a flexible clamping block with an arc-shaped groove that adapts to the contour of the battery tray. Combined with an elastic anti-slip layer, this allows for a tight fit with the battery tray, increasing friction and improving clamping stability. The combination of a buffer spring and the flexible clamping block enables flexible clamping, preventing damage to the battery tray from rigid clamping. It also adapts to subtle changes in the tray's contour, ensuring appropriate clamping force. A pressure sensor monitors the clamping force in real time, enabling intelligent feedback and adjustment of the clamping state.

[0020] The rotating drive component of the angle adjustment mechanism of the present invention can drive the rotating internal gear plate to rotate, thereby driving the battery tray to rotate synchronously to meet the multi-angle welding requirements; the positioning structure can quickly lock after the angle is adjusted to the position, ensuring the angle is stable during the welding process, and the operation is convenient and efficient. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 1 A partial top-view structural diagram along the A-axis; Figure 4 for Figure 2 Enlarged structural diagram of the flexible clamping block; Figure 5 for Figure 1 Enlarged structural diagram at point B; Figure 6 A top view of the anti-slip texture structure; Figure 7 for Figure 2 Enlarged structural diagram at point C; Figure 8 for Figure 2 A magnified structural diagram at point D.

[0022] In the diagram, 1 is the clamp base, 2 is the rotary drive component, 3 is the rotating internal gear plate, 4 is the double track, 5 is the sliding plate, 6 is the rotating plate, 7 is the positioning column, 8 is the external gear cylinder, 9 is the spline, 10 is the spline groove, 11 is the clamping bracket, 12 is the clamping drive component, 13 is the flexible clamping block, 14 is the support rod, 15 is the arc-shaped groove, 16 is the buffer spring, 17 is the annular locking groove, 18 is the locking block, 19 is the locking bolt, 20 is the elastic anti-slip layer, 21 is the Velcro, 22 is the position sensor, 23 is the pressure sensor, 24 is the flexible buffer pad, 25 is the anti-slip texture, 26 is the mounting column, 27 is the push-pull cylinder, 28 is the push-pull rod, and 29 is the limit ring. Detailed Implementation

[0023] The attached figures illustrate specific embodiments of the present invention.

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0026] like Figures 1 to 8 As shown, this flexible welding fixture for new energy vehicle battery trays is controlled by a control system, which can be a PLC control system. It includes a fixture base 1 and flexible positioning components, adaptive clamping components, an angle adjustment mechanism, and a control system mounted on the fixture base 1. This allows for simultaneous welding of multiple battery trays, adapting to mass production needs.

[0027] The fixture base 1 is made of cast iron, with a stable structure that can withstand the impact and vibration during the welding process. A circular recess is excavated downward in the center of the fixture base 1. The fixture base 1 is equipped with a rotating internal gear plate 3 driven by a rotating drive component 2. The rotating drive component 2 is a servo motor, which has the advantages of precise speed and fast response, and can achieve precise control of the rotation angle. The rotary drive component 2 is located inside the fixture base 1 and is connected to the rotary internal gear plate 3 via a transmission connection. The connection method is the existing technology, such as setting a ring rack on the lower surface of the rotary internal gear plate 3, and the output end of the rotary drive component 2 is connected to the ring rack through a gear meshing, or a frame is installed on the lower surface of the rotary internal gear plate 3, a sprocket is installed in the middle of the frame, and a sprocket is also installed on the output end of the rotary drive component 2, and the transmission connection is achieved through the sprocket, etc., which will not be elaborated further. A positioning structure is provided between the rotating inner gear plate 3 and the fixture base 1. When the rotating inner gear plate 3 rotates to its position, the battery tray is positioned by the positioning structure to facilitate welding. The specific structure of the positioning structure is as follows: An annular locking groove 17 is formed on the upper edge of the recessed part on the fixture base 1. The annular locking groove 17 is concentrically set with the rotating internal gear plate 3. The two upper edges of the annular locking groove 17 are lower than the upper surface of the fixture base 1. The rotating internal gear plate 3 rests on the upper edge of the annular locking groove 17. A locking block 18 is provided on the lower surface of the rotating internal gear plate 3. The locking block 18 is integrally formed with the rotating internal gear plate 3, and the structure is stable. The locking block 18 is threadedly connected to the locking bolt 19. The locking bolt 19 is a high-strength bolt. The locking bolt 19 can pass through the locking block 18 and contact the bottom of the annular locking groove 17. Tightening the locking bolt 19 can lock the rotating internal gear plate 3 and ensure the stability of the welding angle.

[0028] The flexible positioning component includes multiple sets of double tracks 4, which are radially distributed around the center of the rotating internal gear ring 3 to achieve synchronous positioning of multiple battery trays. The double tracks 4 are made of stainless steel with a hardened surface for high wear resistance. The outer ends of the double tracks 4 are fixed to the clamping base 1, and the inner ends are suspended above the recessed part of the clamping base 1 after passing over the rotating internal gear ring 3. A sliding plate 5 is slidably mounted on the double tracks 4, and a sliding pair is provided between the sliding plate 5 and the double tracks 4 to ensure smooth sliding. A rotating plate 6 is mounted on the sliding plate 5 and is connected to the sliding plate 5 through a bearing, allowing it to rotate relative to the sliding plate 5. The upper part is provided with a positioning post 7, which is threadedly connected to the rotating plate 6 for easy disassembly and replacement, and is compatible with positioning holes of different specifications; the lower surface of the inner end of the double track 4 is provided with a rotating external gear cylinder 8, which is meshed with the rotating internal gear plate 3. When the rotating internal gear plate 3 rotates, it can drive all the external gear cylinders 8 to rotate synchronously, so as to realize the synchronous angle adjustment of multiple battery trays; the rotating plate 6 and the external gear cylinder 8 are respectively provided with matching splines 9 and spline grooves 10. The spline 9 is located at the bottom of the rotating plate 6, and the spline groove 10 is located at the top of the external gear cylinder 8. The cooperation of the spline 9 and the spline groove 10 ensures that the rotating plate 6 and the external gear cylinder 8 rotate synchronously.

[0029] The part of the double track 4 above the rotating internal gear ring 3, that is, the inner end is suspended, to prevent friction from occurring when the rotating internal gear ring 3 rotates and to allow the locking bolt 19 to pass through.

[0030] The adaptive clamping assembly includes clamping brackets 11 symmetrically arranged on both sides of the rotating internal gear plate 3, a clamping drive component 12, and several flexible clamping blocks 13. The clamping brackets 11 are frame-type, spanning across the rotating internal gear plate. The two lower ends of the clamping brackets 11 are respectively fixed to the fixture base 1 by bolts, ensuring a secure connection and facilitating disassembly and maintenance. The clamping drive component 12 is mounted on the clamping brackets 11 and is a hollow piston hydraulic cylinder with its output end facing downwards. The hollow piston hydraulic cylinder is made of seamless steel pipe and can operate at a pressure of up to 20 MPa, meeting the clamping force requirements. The lightweight design saves installation space. The flexible clamping blocks 13 are made of polyurethane, which has good flexibility and wear resistance. The number of flexible clamping blocks 13 is the same as the number of double tracks 4, and they are located above the double tracks 4 one by one. The flexible clamping blocks 13 are connected to the output end of the clamping drive component 12 through radially distributed support rods 14. The support rods 14 are made of high-strength alloy steel to ensure uniform force distribution. The lower surface of each flexible clamping block 13 is provided with an arc-shaped groove 15 that matches the contour of the battery tray to ensure that the flexible clamping block 13 fits tightly with the surface of the battery tray.

[0031] The inner wall of the arc-shaped groove 15 is provided with an elastic anti-slip layer 20. The elastic anti-slip layer 20 is detachably connected to the arc-shaped groove 15 by Velcro 21 for easy replacement. The elastic anti-slip layer 20 is made of nitrile rubber with a thickness of 3mm. Nitrile rubber has good elasticity and wear resistance, which can increase the friction between the battery tray and the tray, while avoiding damage to the tray surface.

[0032] The control system adopts a PLC control system, which is electrically connected to the rotary drive component 2, the clamping drive component 12 and the push-pull device respectively. The PLC controller can preset the positioning parameters, clamping parameters and angle parameters of battery trays of different specifications, and can realize the synchronous automated control of positioning, clamping and angle adjustment of multiple battery trays, which is suitable for the needs of simultaneous construction and welding of multiple battery trays in mass production. At the same time, the control system is also equipped with a touch screen, which facilitates manual operation, parameter setting and status monitoring.

[0033] In this embodiment, a position sensor 22 is provided at the top of the positioning post 7. The position sensor 22 is a proximity switch, model E2E-X10ME1, which can detect whether the positioning post 7 is accurately inserted into the positioning hole of the battery tray. A pressure sensor 23 is embedded in the elastic anti-slip layer 20. The pressure sensor 23 is a thin-film pressure sensor, model FSR402, which can detect the clamping force in real time. The position sensor 22 and the pressure sensor 23 are electrically connected to the control system. When the position sensor 22 detects that the positioning is in place and the pressure sensor 23 detects that the clamping force has reached the preset value, the control system controls each driving component to stop working to ensure reliable positioning and clamping.

[0034] A switch is provided in the connection line between the pressure sensor 23 and the control system. When the worker finishes welding, the switch can be turned off, and the control system determines whether the welding work is completed by the number of signals received from the pressure sensor.

[0035] The top of the positioning post 7 is provided with a flexible buffer pad 24. The flexible buffer pad 24 is made of silicone material with a thickness of 5mm. The surface of the flexible buffer pad 24 is provided with anti-slip texture 25. The anti-slip texture 25 is grid-like, which can improve the stability of positioning, prevent the battery tray from sliding, and at the same time buffer the positioning impact force to protect the battery tray.

[0036] The push-pull device includes: a mounting post 26 installed on the clamping bracket 11 and passing through the clamping drive component 12. The mounting post 26 can be fixed on the clamping bracket 11. The mounting post 26 is made of stainless steel and has a stable structure. A push-pull cylinder 27 is fixedly installed at the lower end of the mounting post 26. Several push-pull rods 28 are hinged to the output end of the push-pull cylinder 27. The number of push-pull rods 28 is the same as the number of sliding plates 5. One push-pull rod 28 is matched with one sliding plate 5. The push-pull rods 28 are made of high-strength alloy steel and the lower end of the push-pull rods 28 is hinged to the sliding plate 5, which can realize the synchronous reciprocating motion of all sliding plates 5 along the corresponding double track 4, which is convenient for replacing battery trays of different specifications. A limiting ring 29 is also fitted on the extension and retraction trajectory of the output end of the push-pull cylinder 27 to facilitate the retraction of the push-pull rods 28. The limiting ring 29 is made of nylon and can be fixedly connected to the cylinder body of the push-pull cylinder 27 to limit the push-pull rods 28, which is convenient for retraction and pushing and pulling the sliding plates 5.

[0037] The adaptive clamping assembly also includes a buffer spring 16, which is sleeved on the output end of the clamping drive 12. The buffer spring 16 is made of stainless steel and has a moderate elastic coefficient. One end of the buffer spring 16 is fixedly connected to the clamping bracket 11, and the other end is fixedly connected to the output end of the clamping drive 12. It can buffer the driving force of the clamping drive 12, realize flexible clamping, and avoid excessive clamping that could damage the battery tray.

[0038] Rollers with foot brakes can also be installed at the four corners of the clamp base 1 for easy movement.

[0039] The work process is as follows: Parameter settings: Through the touch screen of the control system, the specifications, positioning parameters, clamping force parameters and welding angle parameters of the battery tray to be welded can be preset to adapt to the simultaneous construction needs of multiple battery trays. Flexible positioning: The control system controls the push-pull cylinder 27 of the push-pull device to work. The push-pull cylinder 27 synchronously drives all sliding plates 5 to slide along the corresponding double tracks 4 through the push-pull rod 28, so that they slide out of the position covered by the flexible clamping block 13, and place the battery tray on the rotating plate 6, which is positioned by the positioning post 7. After all battery trays are in place, the position sensor 22 detects that the positioning is in place and sends a signal to the control system. The push-pull cylinder 27 starts, the push-pull rod 28 retracts, and pulls the sliding plate 5 inward to the position covered by the flexible clamping block 13. At the same time, the spline 9 and the spline groove 10 cooperate, so that the external gear cylinder The rotating plate 6 and the rotating plate 8 can rotate synchronously, and at the same time drive the battery tray to rotate synchronously. The control system controls the rotating drive 2 to work. The rotating drive 2 drives the rotating internal gear plate 3 to rotate. The rotating internal gear plate 3 drives all the external gear cylinders 8 to rotate synchronously. The external gear cylinders 8 drive the rotating plate 6 and the battery tray to rotate through the cooperation of the spline 9 and the spline groove 10 until the battery tray rotates to a position suitable for the operator to weld (the rotation angle can be set in advance). Tighten the locking bolt 19 so that its lower end only abuts against the bottom of the annular locking groove 17, thereby fixing the rotation angle of the rotating internal gear plate 3, thereby flexibly positioning the battery tray. Adaptive clamping: The clamping drive 12 (hollow piston cylinder) is controlled to work, and the clamping drive 12 pushes the flexible clamping block 13 to move towards the battery tray. The arc-shaped groove 15 of the flexible clamping block 13 fits against the surface of the battery tray. The elastic anti-slip layer 20 increases the friction, and the buffer spring 16 buffers the clamping force to achieve flexible clamping. The pressure sensor 23 detects the clamping force in real time. When the clamping force reaches the preset value, it sends a signal to the control system, and the control system controls the clamping drive 12 to stop working. Welding operation: Start the welding equipment and perform synchronous welding on multiple battery trays. During the welding process, position sensor 22 and pressure sensor 23 monitor the positioning and clamping status in real time. If a positioning deviation or abnormal clamping force occurs, the control system will issue an alarm in time and adjust the relevant components. Work completion: After each battery tray is welded, the operator turns off the switch of the pressure sensor 23 above the battery tray. After the control system receives the signal that all pressure sensors have completed their work (no signal is received), the control system controls the clamping drive 12 to reset, the flexible clamping block 13 to release the battery tray, the locking bolt 19 to loosen, and the rotation drive 2 to rotate the battery tray to the next welding point. If there is only one welding point, this step can be omitted until all points are welded. The push-pull cylinder 27 is activated, which drives the sliding plate 5 to move outward through the push-pull rod 28, leaving the coverage area of ​​the flexible clamping block 13. The welded battery is removed, replaced with another batch of battery trays to be welded, and the above actions are repeated.

[0040] When welding battery trays of different specifications, the positioning position, clamping force and welding angle can be automatically adjusted by modifying the preset parameters through the control system. There is no need to change the fixture, making it convenient to operate and highly versatile.

[0041] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; "link" can mean a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit 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 invention.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0045] Apart from the technical features described in the specification, all other technical features are known to those skilled in the art.

Claims

1. A flexible welding fixture for a new energy vehicle battery tray, characterized in that, Includes a fixture base and a flexible positioning component, an adaptive clamping component, an angle adjustment mechanism, and a control system mounted on the fixture base; The angle adjustment mechanism includes a rotating internal gear plate mounted on the fixture base and driven to rotate by a rotary drive component. A positioning structure is provided between the rotating internal gear plate and the fixture base. The rotary drive component is installed inside the fixture base, and its output end is connected to the rotating internal gear plate in a transmission manner. The flexible positioning component includes multiple sets of double tracks fixed on the fixture base and located above the rotating internal gear plate. A sliding plate is slidably mounted on the double tracks, a rotating plate is mounted on the sliding plate, and a positioning post is mounted on the rotating plate. An external gear cylinder that rotates on the shaft is mounted on the lower surface of the inner end of the double tracks. The external gear cylinder is meshed with the rotating internal gear plate. A matching spline and spline groove are respectively provided between the rotating plate and the external gear cylinder. The sliding plate is provided with a matching push-pull device. The adaptive clamping assembly includes clamping brackets symmetrically arranged on both sides of the rotating internal gear plate, a clamping drive, and several flexible clamping blocks. The clamping brackets are fixed on the fixture base, the clamping drive is mounted on the clamping brackets, and the flexible clamping blocks are connected to the output end of the clamping drive through radially distributed support rods. The lower surface of the flexible clamping blocks is provided with an arc-shaped groove that matches the contour of the battery tray, and an arc-shaped groove is provided above each external gear cylinder. The control system is electrically connected to the rotary drive, the clamping drive, and the push-pull device, respectively.

2. The flexible welding fixture for new energy vehicle battery trays according to claim 1, characterized in that, The positioning structure includes: an annular locking groove on the fixture base; a locking block on the lower surface of the rotating internal gear plate; a locking bolt threadedly connected to the locking block; and the locking bolt being able to pass through the locking block and contact the bottom of the annular locking groove.

3. The flexible welding fixture for new energy vehicle battery trays according to claim 1, characterized in that, The inner wall of the arc-shaped groove is provided with an elastic anti-slip layer.

4. The flexible welding fixture for new energy vehicle battery trays according to claim 3, characterized in that, The elastic anti-slip layer is detachably connected to the arc-shaped groove via Velcro; the elastic anti-slip layer is made of nitrile rubber with a thickness of 2-5mm.

5. The flexible welding fixture for new energy vehicle battery trays according to claim 3, characterized in that, A position sensor is provided at the top of the positioning column, and a pressure sensor is embedded in the elastic anti-slip layer. The position sensor and the pressure sensor are electrically connected to the control system, and a switch is provided in the connection line between the pressure sensor and the control system.

6. The flexible welding fixture for new energy vehicle battery trays according to claim 1, characterized in that, The top of the positioning post is equipped with a flexible buffer pad.

7. The flexible welding fixture for new energy vehicle battery trays according to claim 6, characterized in that, The flexible cushioning pad is made of silicone material with a thickness of 3-8mm, and the surface of the flexible cushioning pad has anti-slip texture.

8. The flexible welding fixture for new energy vehicle battery trays according to claim 1, characterized in that, The clamping drive component is a hollow piston cylinder.

9. The flexible welding fixture for new energy vehicle battery trays according to claim 8, characterized in that, The push-pull device includes: a mounting column installed on a clamping bracket and passing through a clamping drive component; a push-pull cylinder is fixedly provided at the lower end of the mounting column; a plurality of push-pull rods are hinged to the output end of the push-pull cylinder; the lower end of the push-pull rods is hinged to a sliding plate; a limiting ring is also fitted on the extension and retraction trajectory of the output end of the push-pull cylinder to facilitate the retraction of the push-pull rods.

10. The flexible welding fixture for new energy vehicle battery trays according to claim 1, characterized in that, The adaptive clamping assembly also includes a buffer spring, which is sleeved on the output end of the clamping drive. One end of the buffer spring is fixedly connected to the clamping bracket, and the other end is fixedly connected to the output end of the clamping drive.

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