Alternating positioning and locking structure of double-station welding platform

Abstract

The present application belongs to the technical field of battery processing equipment, and particularly relates to an alternating positioning and locking structure of a double-station welding platform. The locking mechanism is fixed on the platform main body corresponding to the welding position. The first station and the second station independently move along the first direction and alternately enter the welding position. When the first station or the second station moves to the welding position, the driving device drives the locking head to move towards the locking seat on the station, and the self-centering guide part is used to correct and lock the station at the welding position by cooperating with the locking seat. After the welding is completed, the locking mechanism releases the current station, the station moves out of the welding position, and the other station moves in and is locked by the same locking mechanism, thereby realizing the alternating locking of the double stations. The same locking mechanism serves the two stations that alternately enter the welding position, thereby reducing the number of locking mechanisms, compacting the structure, simplifying the control, and significantly improving the equipment utilization and the welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery processing equipment technology, specifically to an alternating positioning and locking structure for a dual-station welding platform. Background Technology

[0002] In battery cell or battery pack soldering equipment, a single-station soldering platform structure is often used. The soldering process requires sequential completion of steps such as loading, soldering, inspection, and unloading. These steps are executed serially, resulting in long idle times and low production efficiency. To improve efficiency, dual-station soldering platforms have emerged in existing technologies. These platforms allow two stations to alternately perform soldering operations. While one station is soldering, the other station can handle loading and unloading, thus reducing equipment waiting time.

[0003] However, existing dual-station welding platforms still have the following problems during the switching between stations: insufficient positioning accuracy after station switching, affecting the consistency of weld points; poor platform locking reliability, which easily causes micro-displacement during welding or inspection, resulting in unstable welding quality.

[0004] Therefore, we proposed an alternating positioning and locking structure for a dual-station welding platform to solve the above problems. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an alternating positioning and locking structure for a dual-station welding platform, which solves the problems mentioned in the background art, such as insufficient positioning accuracy after station switching, affecting weld consistency, and poor platform locking reliability, leading to unstable welding quality.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] The alternating positioning and locking structure of the dual-station welding platform includes:

[0010] Platform entity;

[0011] The first station and the second station are movably disposed on the platform body along the first direction, and the first station and the second station are adapted to move independently between the welding position and the loading and unloading position.

[0012] The locking mechanism includes a base fixed to the platform body and disposed at a corresponding welding position, a locking actuator movably disposed on the base, and a driving device for driving the locking actuator to move.

[0013] The locking actuator has a locking head, and the front end of the locking head is provided with a self-centering guide.

[0014] The first and second workstations are respectively equipped with locking seats that cooperate with the locking head;

[0015] When the first or second workstation moves to the welding position, the driving device drives the locking head to move towards the locking seat on that workstation. The workstation is corrected and locked in the welding position by the cooperation of the self-centering guide and the locking seat.

[0016] Furthermore, the locking head achieves axial movement through threaded transmission; the locking actuator includes a screw portion that is threadedly engaged with the base, the locking head is connected to one end of the screw portion, and the driving device drives the screw portion to rotate.

[0017] Furthermore, a pressure sensor is provided between the locking head and the screw section to detect the pressure applied by the locking head to the locking seat.

[0018] Furthermore, the locking head is connected to the screw part through a floating connection structure, which allows the locking head to be elastically compressed in the axial direction relative to the screw part, and the pressure sensor is disposed on the force transmission path between the locking head and the screw part.

[0019] Furthermore, an annular groove is formed at the end of the screw facing the locking head, and a pressure plate is rotatably sleeved in the annular groove. The pressure sensor is fixed to the side of the pressure plate facing the locking head.

[0020] The locking head is fixedly connected to a plurality of guide shafts at one end away from the self-centering guide part. The guide shafts slide through the pressure plate and extend to the other side of the pressure plate.

[0021] Each of the guide shafts is fitted with a spring, which is confined between the locking head and the pressure plate. In the absence of external force, the spring pushes the locking head away from the pressure sensor and maintains a gap between them.

[0022] The annular groove, pressure plate, guide shaft, and spring together constitute a floating connection structure.

[0023] Furthermore, a gear is coaxially fixedly connected to the end of the screw portion away from the locking head; the driving device includes a locking servo motor, a transmission screw connected to the output end of the locking servo motor, a main rack threaded with the transmission screw, and at least one secondary rack meshing with the main rack, the end of the secondary rack away from the main rack meshing with the gear; the locking servo motor drives the transmission screw to rotate, causing the main rack to move axially along the transmission screw, and then drives the gear portion to rotate through the secondary rack.

[0024] Furthermore, the pressure plate is also fixed with an anti-rotation rod extending away from the locking head; the screw part and the gear part have a common axially penetrating receiving hole inside, and an anti-rotation seat is fixedly installed in the base. The anti-rotation seat passes through the receiving hole, and the screw part and the gear part can rotate relative to the anti-rotation seat; the anti-rotation seat has an axially opening anti-rotation hole inside, and the anti-rotation rod slides in the anti-rotation hole to allow the pressure plate to move axially with the screw part while restricting its rotation.

[0025] Furthermore, locking grooves are respectively provided on both sides of the base corresponding to the welding position. Each locking groove has two oppositely arranged threaded holes on its inner wall, for a total of four threaded holes. Each threaded hole is fitted with a locking actuator. The gear parts of the four locking actuators mesh with four corresponding secondary racks, and the four secondary racks mesh with the same main rack, so that the four locking actuators move synchronously to lock or release the workstation located at the welding position from both sides.

[0026] Furthermore, the self-centering guide part is a conical surface, and the locking seat is provided with a conical groove that matches the conical surface; the locking head guides the work station to the welding position through the cooperation of the conical surface and the conical groove.

[0027] Furthermore, the platform body is equipped with two sets of conveying modules, which respectively drive the first workstation and the second workstation to reciprocate along a first direction; each set of conveying modules includes:

[0028] The support frame is fixed inside the main body of the platform;

[0029] A servo motor is mounted on the support frame;

[0030] The driving wheel and the driven wheel are arranged at intervals on the support frame along the first direction, and the servo motor drives the driving wheel to rotate.

[0031] A timing belt is wound between the driving pulley and the driven pulley;

[0032] A guide rail is mounted on the support frame along the first direction;

[0033] The conveyor seat is slidably mounted on the guide rail and is fixedly connected to one side of the synchronous belt via a drive plate;

[0034] The top of the platform body is provided with two sliding grooves extending along the first direction. Both the first and second workstations include a fixture fixing seat for carrying the battery cell fixture. The bottom of the fixture fixing seat has a connecting arm that passes through the corresponding sliding groove and is fixedly connected to the conveyor seat. The interior of the connecting arm is hollow.

[0035] A decorative panel is inserted through the hollow part of the connecting arm, and both ends of the decorative panel are fixed to the inner walls of both ends of the slide groove to cover the slide groove.

[0036] (III) Beneficial Effects

[0037] Compared with the prior art, the present invention provides an alternating positioning and locking structure for a dual-station welding platform, which has the following advantages:

[0038] This invention uses a locking mechanism fixed to the corresponding welding position on the platform body. A first and second workstation move independently along a first direction and alternately enter the welding position. When either the first or second workstation moves to the welding position, a drive device drives the locking head to move towards the locking seat on that workstation. The self-centering guide and the locking seat work together to correct and lock the workstation to the welding position. After welding is completed, the locking mechanism releases the current workstation, which moves out of the welding position, while another workstation moves in and is locked by the same locking mechanism, achieving alternating locking of the two workstations. The same locking mechanism serves the two workstations that alternately enter the welding position, reducing the number of locking mechanisms, resulting in a compact structure, simple control, and significantly improved equipment utilization and welding efficiency. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the main structure of the platform of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the main body of the platform of the present invention;

[0041] Figure 3 This is a schematic diagram of the conveying module structure of the present invention;

[0042] Figure 4 This is a cross-sectional view of the main structure of the platform of the present invention;

[0043] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0044] Figure 6 for Figure 4 Enlarged view of the structure at point B;

[0045] Figure 7 This is a schematic diagram of the main rack structure of the present invention.

[0046] In the diagram: 1. Platform body; 11. Slide groove; 2. First station; 3. Second station; 4. Locking mechanism; 41. Base; 411. Limiting groove; 412. Guide rod; 42. Locking actuator; 421. Locking head; 422. Self-centering guide; 423. Screw; 424. Pressure sensor; 425. Annular groove; 426. Pressure plate; 427. Guide shaft; 428. Spring; 429. Gear; 43. Drive device; 431. Locking servo motor; 432. Transmission screw; 433. Main rack; 434. Secondary rack 435. Slide plate; 436. Bushing; 44. Anti-rotation rod; 45. Anti-rotation seat; 46. Anti-rotation hole; 47. Locking groove; 48. Threaded hole; 49. Cover plate; 491. Clearance groove; 5. Locking seat; 6. Conveying module; 61. Support frame; 62. Servo motor; 63. Drive wheel; 64. Driven wheel; 65. Synchronous belt; 66. Guide rail; 67. Conveying seat; 671. Drive board; 672. Induction plate; 68. Decorative panel; 69. Slotted photoelectric switch; 7. Fixture fixing seat; 71. Connecting arm; 8. Battery cell fixture. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Example

[0049] like Figure 1-7 As shown, an embodiment of the present invention proposes an alternating positioning and locking structure for a dual-station welding platform, comprising:

[0050] Platform Entity 1;

[0051] The first station 2 and the second station 3 are respectively movably disposed on the platform body 1 along the first direction (Y direction), and the first station 2 and the second station 3 are adapted to move independently between the welding position and the loading and unloading position;

[0052] The locking mechanism 4 includes a base 41 fixed to the platform body 1 and disposed at a corresponding welding position, a locking actuator 42 movably disposed on the base 41, and a driving device 43 for driving the locking actuator 42 to move.

[0053] The locking actuator 42 has a locking head 421, and the front end of the locking head 421 is provided with a self-centering guide part 422;

[0054] The first station 2 and the second station 3 are respectively provided with locking seats 5 that cooperate with locking heads 421;

[0055] When the first station 2 or the second station 3 moves to the welding position, the driving device 43 drives the locking head 421 to move towards the locking seat 5 on that station. The self-centering guide part 422 cooperates with the locking seat 5 to correct and lock the station in the welding position.

[0056] like Figure 1-7 As shown, in some embodiments, the locking head 421 achieves axial movement through threaded transmission; the locking actuator 42 includes a screw portion 423 that is threadedly engaged with the base 41, the locking head 421 is connected to one end of the screw portion 423, and the driving device 43 drives the screw portion 423 to rotate.

[0057] The locking head 421 uses a threaded drive to achieve axial feed. The screw portion 423 in the locking actuator 42 forms a helical engagement with the threaded hole 48 on the base 41. When the drive device 43 applies a rotational torque to the screw portion 423, the screw portion 423 rotates while simultaneously moving linearly along its own axis due to the thread constraint, thereby driving the locking head 421 connected to its end to move axially synchronously. The threaded drive has the characteristics of controllable stroke and smooth transmission, and can achieve self-locking through the design of the thread helix angle, ensuring that the screw portion 423 will not loosen due to reverse rotation caused by external force in the locked state.

[0058] The axial movement of the locking head 421 is achieved by using threaded transmission, which has high transmission accuracy and precise controllable feed rate. In addition, the threaded pair itself has self-locking capability, and can reliably maintain the locking force after the drive device 43 stops outputting, avoiding loosening of the lock due to vibration or external force, thus improving the reliability and stability of locking.

[0059] like Figure 1-7 As shown, in some embodiments, the thread on the screw portion 423 is a large-pitch thread, and the threaded hole 48 on the base 41 is a matching large-pitch threaded hole 48. By adopting a large-pitch design, the screw portion 423 can generate a large axial displacement with each rotation, significantly reducing the rotation angle required for the locking head 421 to move from the initial position to the locking position. The locking action can be completed with only one rotation or less, significantly shortening the locking response time and improving the efficiency of workstation switching.

[0060] like Figure 1-7 As shown, in some embodiments, a pressure sensor 424 is provided between the locking head 421 and the screw portion 423 to detect the pressure applied by the locking head 421 to the locking seat 5.

[0061] A pressure sensor 424 is connected in series in the force transmission path between the locking head 421 and the screw part 423. When the locking head 421 abuts against the locking seat 5 and applies pressure, the pressure sensor 424 is subjected to axial compression between the locking head 421 and the screw part 423, converting the pressure value into an electrical signal and outputting it to the control system. The control system determines whether the locking is in place based on a preset pressure threshold. When the detected pressure reaches the preset value, it issues a command to stop the further action of the drive device 43, completing the locking operation.

[0062] By setting a pressure sensor 424 between the locking head 421 and the screw part 423, real-time detection and closed-loop control of the locking force are realized. It can accurately determine whether the locking state meets the standard, avoid workpiece deformation or mechanical damage caused by over-locking, and also avoid welding micro-movement caused by under-locking, thus ensuring the consistency and controllability of the locking force.

[0063] like Figure 1-7 As shown, in some embodiments, the locking head 421 is connected to the screw portion 423 via a floating connection structure, which allows the locking head 421 to be elastically compressed relative to the screw portion 423 in the axial direction, and the pressure sensor 424 is disposed on the force transmission path between the locking head 421 and the screw portion 423.

[0064] The locking head 421 is not rigidly fixed to the screw portion 423, but is elastically connected through a floating connection structure. This floating connection structure allows the locking head 421 to generate a certain amount of elastic compression displacement relative to the screw portion 423 when subjected to axial thrust, and the pressure sensor 424 is precisely arranged on the force transmission path of this elastic compression. When the front end of the locking head 421 abuts against the locking seat 5, as the screw portion 423 continues to feed, the floating connection structure is compressed, and the locking head 421 transmits the thrust to the pressure sensor 424, pressing the pressure sensor 424 between the locking head 421 and the screw portion 423, thereby accurately sensing the magnitude of the locking force.

[0065] The floating connection structure allows the locking force to be smoothly transmitted to the pressure sensor 424 through the elastic element. On the one hand, it avoids damage to the pressure sensor 424 caused by rigid impact. On the other hand, it enables the pressure sensor 424 to obtain the locking force signal stably and accurately. It also prevents the locking head 421 from contacting the pressure sensor 424 in the unlocked state, thereby improving the reliability of pressure detection and the service life of the sensor.

[0066] like Figure 1-7 As shown, in some embodiments, an annular groove 425 is provided at one end of the screw portion 423 facing the locking head 421, and a pressure plate 426 is rotatably sleeved in the annular groove 425. The pressure sensor 424 is fixed to the side of the pressure plate 426 facing the locking head 421.

[0067] The locking head 421 is fixedly connected to a plurality of guide shafts 427 at one end away from the self-centering guide part 422. The guide shafts 427 slide through the pressure plate 426 and extend to the other side of the pressure plate 426.

[0068] Each of the guide shafts 427 is fitted with a spring 428, which is limited between the locking head 421 and the pressure plate 426. In the absence of external force, the spring 428 pushes the locking head 421 away from the pressure sensor 424 and maintains a gap between them.

[0069] The annular groove 425, pressure plate 426, guide shaft 427 and spring 428 together constitute a floating connection structure.

[0070] A pressure plate 426 is rotatably sleeved within an annular groove 425 at the front end of the screw portion 423. The screw portion 423 can rotate freely relative to the pressure plate 426, but will cause the pressure plate 426 to move axially together. A pressure sensor 424 is fixed on the side of the pressure plate 426 facing the locking head 421. Several guide shafts 427 are fixed at the rear end of the locking head 421. The guide shafts 427 pass through corresponding holes on the pressure plate 426 and can slide freely axially. A limiting boss is provided at the end of the guide shaft 427 that passes through the pressure plate 426. The design of the limiting boss ensures that the guide shaft 427 will not completely detach from the pressure plate 426 under the spring return drive of the spring 428.

[0071] Each guide shaft 427 is fitted with a spring 428, with both ends of the spring 428 abutting against the rear end face of the locking head 421 and the front side of the pressure plate 426, respectively. In the absence of external force, the elastic force of the spring 428 pushes the locking head 421 forward away from the pressure sensor 424, maintaining a preset gap between them. When the front end of the locking head 421 is subjected to the counter-pushing force of the locking seat 5, the locking head 421 moves backward against the force of the spring 428, and the gap gradually decreases until the rear end face of the locking head 421 presses against the pressure sensor 424. The annular groove 425, the pressure plate 426, the guide shaft 427, and the spring 428 together constitute the floating connection structure, realizing the elastic floating of the locking head 421 and the smooth transmission of pressure.

[0072] The floating connection structure is ingeniously designed. When there is no external force, the spring 428 keeps the locking head 421 separated from the pressure sensor 424, avoiding zero drift and fatigue caused by long-term pre-compression of the sensor. During operation, the elastic compression of the spring 428 makes the transmission of locking force smooth and gradual, and the pressure sensor 424 is subjected to uniform force, resulting in high detection accuracy. At the same time, the pressure plate 426 is rotatably connected to the screw part 423 through the annular groove 425, so that the rotation of the screw part 423 will not drive the locking head 421 to rotate, ensuring that the fitting accuracy of the self-centering guide part 422 and the locking seat 5 is not affected by rotation.

[0073] like Figure 1-7As shown, in some embodiments, a gear portion 429 is coaxially fixedly connected to one end of the screw portion 423 away from the locking head 421; the driving device 43 includes a locking servo motor 431, a transmission screw 432 connected to the output end of the locking servo motor 431, a main rack 433 threadedly engaged with the transmission screw 432, and at least one secondary rack 434 meshing with the main rack 433, the end of the secondary rack 434 away from the main rack 433 meshing with the gear portion 429; the locking servo motor 431 drives the transmission screw 432 to rotate, causing the main rack 433 to move axially along the transmission screw 432, and then drives the gear portion 429 to rotate through the secondary rack 434.

[0074] A gear section 429 is coaxially fixed to the rear end of the screw section 423, and the two can rotate as a unit. The power of the drive device 43 comes from the locking servo motor 431, and its output end is connected to the transmission screw 432. A main rack 433 is threaded onto the transmission screw 432, and the main rack 433 can translate along the axial direction of the transmission screw 432. A secondary rack 434 meshes with the top of the main rack 433, and the other end of the secondary rack 434 meshes with the gear section 429. When the locking servo motor 431 drives the transmission screw 432 to rotate, the main rack 433 (which is threadedly engaged with the transmission screw 432 via a nut seat) moves axially along the transmission screw 432 under threaded drive. The main rack 433 drives the auxiliary rack 434 to move linearly in sync through tooth meshing. The linear movement of the auxiliary rack 434 then drives the gear section 429 to rotate through its meshing with the gear section 429, ultimately transmitting power to the screw section 423, driving the screw section 423 to rotate and causing the locking head 421 to feed axially. In this transmission chain, the main rack 433 and the auxiliary rack 434 have a rack-and-rack meshing relationship, both of which move linearly. The auxiliary rack 434 and the gear section 429 have a rack-and-gear meshing relationship, converting the linear motion into the rotational motion of the gear section 429.

[0075] The gear part 429 has sufficient length along the axial direction so that while rotating and moving axially together with the screw part 423, the gear part 429 always maintains reliable meshing with the secondary rack 434 and will not disengage from the secondary rack 434 due to the axial displacement of the gear part 429.

[0076] A multi-stage transmission system employing a servo motor 62, a lead screw 432, a main rack 433, a secondary rack 434, and gear units 429 converts the motor's rotational motion into linear motion of the main rack 433 via the lead screw. The main rack 433 then synchronously drives multiple secondary racks 434 in linear motion, ultimately driving the gear units 429 to rotate synchronously. This transmission chain is clear and reliable. The main rack 433 meshes with multiple secondary racks 434 simultaneously, enabling a single power source to synchronously drive multiple sets of locking actuators 42, ensuring the synchronicity of the locking heads 421. The relatively long axial dimension of the gear unit 429 ensures continuous meshing with the secondary racks 434 throughout its entire stroke as it rotates and moves axially with the lead screw 423, resulting in continuous and stable transmission. The servo motor 62 provides high control precision, facilitating accurate control of locking force and locking stroke.

[0077] like Figure 1-7 As shown, in some embodiments, the pressure plate 426 is also fixed with an anti-rotation rod 44 extending in the direction away from the locking head 421; the screw part 423 and the gear part 429 are both provided with an axially penetrating receiving hole, and an anti-rotation seat 45 is fixedly provided in the base 41. The anti-rotation seat 45 passes through the receiving hole, and the screw part 423 and the gear part 429 can rotate relative to the anti-rotation seat 45; the anti-rotation seat 45 is provided with an axially penetrating anti-rotation hole 46, and the anti-rotation rod 44 is slidably fitted in the anti-rotation hole 46 to allow the pressure plate 426 to move axially with the screw part 423 while restricting its rotation.

[0078] An anti-rotation rod 44 extending away from the locking head 421 is fixed on the pressure plate 426. The screw portion 423 and the gear portion 429 share an axially penetrating receiving hole. An anti-rotation seat 45, fixedly mounted inside the base 41, passes through this receiving hole. The screw portion 423 and the gear portion 429 can rotate freely on the outer circumferential surface of the anti-rotation seat 45, which provides rotational support for them. An anti-rotation hole 46 is axially formed inside the anti-rotation seat 45. The cross-sectional shape of the anti-rotation hole 46 is non-circular, and the cross-sectional shape of the anti-rotation rod 44 is adapted to and slidably fitted within it. When the screw part 423 rotates and moves axially, the pressure plate 426 moves axially together with the screw part 423, and the anti-rotation rod 44 slides axially synchronously in the anti-rotation hole 46. However, due to the rotation limit effect of the anti-rotation hole 46 on the anti-rotation rod 44, the pressure plate 426 cannot rotate with the screw part 423, thus always keeping the circumferential position of the locking head 421 and the pressure sensor 424 stable.

[0079] The anti-rotation seat 45 is inserted inside the screw part 423 and the gear part 429, serving as both a rotation support shaft and part of the anti-rotation structure. It has a compact structure and high integration. The anti-rotation rod 44 and the non-circular cross-section of the anti-rotation hole 46 are matched, which reliably restricts the rotational freedom of the pressure plate 426. This ensures that the locking head 421 will not be misaligned with the locking seat 5 due to rotation during operation, ensuring the accuracy of the fit between the self-centering guide part 422 and the locking seat 5. It also avoids the problem of signal wire entanglement or signal instability caused by the rotation of the pressure sensor 424.

[0080] like Figure 1-7 As shown, in some embodiments, locking grooves 47 are respectively provided on both sides of the base 41 corresponding to the welding position. Each locking groove 47 has two oppositely arranged threaded holes 48 on its inner wall, for a total of four threaded holes 48. Each threaded hole 48 is fitted with a locking actuator 42. The gear parts 429 of the four locking actuators 42 respectively mesh with four corresponding secondary racks 434. The four secondary racks 434 mesh with the same main rack 433, so that the four locking actuators 42 move synchronously to lock or release the work position located at the welding position from both sides.

[0081] Locking grooves 47 are formed on both sides of the base 41 corresponding to the welding position. Each locking groove 47 has a threaded hole 48 on each of its left and right sides, with the threaded holes 48 facing each other, for a total of four threaded holes 48. A complete set of locking actuators 42 is installed in each threaded hole 48, that is, there are four sets of locking actuators 42. The gear part 429 of each set of locking actuators 42 meshes with a corresponding secondary rack 434, and all four secondary racks 434 mesh with the same main rack 433 simultaneously. When the main rack 433 moves axially under the drive of the transmission screw 432, the main rack 433 synchronously pushes the four secondary racks 434 to move linearly, thereby synchronously driving the locking heads 421 of the four sets of locking actuators 42 to simultaneously feed towards the center of the welding position or simultaneously retract, so as to symmetrically lock or release the workstation from both sides.

[0082] As the first station 2 and the second station 3 alternately enter the welding position, when one station is in the welding position and is locked, the other station is in the loading and unloading position; after the current welding is completed, the locking mechanism 4 releases the station, the station moves out of the welding position, and the other station moves into the welding position and is locked by the same locking mechanism 4. This cycle is repeated to achieve the alternating locking of the two stations.

[0083] A single power source synchronously drives four sets of locking actuators 42 via a main rack 433, ensuring complete synchronization of the four locking heads 421 and avoiding uneven force distribution that may occur with step-by-step locking. The locking heads 421 apply force symmetrically from both sides of the workstation, resulting in uniform locking force distribution, good correction effect, and high locking stability. The same locking mechanism 4 serves two workstations that alternately enter the welding position, reducing the number of locking mechanisms 4, making the structure compact and simple to control. At the same time, it fully embodies the design concept of alternating positioning locking, improving equipment utilization and welding efficiency.

[0084] like Figure 1-7 As shown, in some embodiments, the self-centering guide part 422 is a conical surface, and the locking seat 5 is provided with a conical groove that matches the conical surface; the locking head 421 guides the work station to the welding position through the cooperation of the conical surface and the conical groove.

[0085] The self-centering guide part 422 is specifically a conical surface, and the locking seat 5 has a corresponding conical groove adapted to the conical surface. When the locking head 421 feeds towards the locking seat 5, the conical surface first contacts the opening of the conical groove. Even if the station has a certain range of Y-direction (or X-direction) offset when it reaches the welding position, the inclined surface of the conical surface and the conical groove will generate a wedge-shaped guiding effect during the feeding process of the locking head 421, gradually squeezing and pushing the station towards the correct position until the conical surface is completely embedded in the conical groove, and the station is corrected to the precise welding position.

[0086] The combination of the conical surface and the conical groove enables passive self-centering correction. Without the need for additional detection elements or active correction mechanisms, it can automatically correct the positional deviation of the station during the locking process, ensuring that the station can be positioned at the welding position with high precision every time. This improves welding consistency and product yield. The structure is simple and reliable, and does not increase control complexity.

[0087] like Figure 1-7 As shown, in some embodiments, the platform body 1 is provided with two sets of conveying modules 6, which respectively drive the first station 2 and the second station 3 to reciprocate along a first direction; each set of conveying modules 6 includes:

[0088] The support frame 61 is fixed inside the platform body 1;

[0089] Servo motor 62 is mounted on the support frame 61;

[0090] The driving wheel 63 and the driven wheel 64 are arranged at intervals on the support frame 61 along the first direction, and the servo motor 62 drives the driving wheel 63 to rotate.

[0091] A timing belt 65 is wound between the driving pulley 63 and the driven pulley 64;

[0092] Guide rail 66 is disposed on support frame 61 along the first direction;

[0093] The conveyor seat 67 is slidably mounted on the guide rail 66 and is fixedly connected to one side of the synchronous belt 65 via the drive plate 671.

[0094] The top of the platform body 1 is provided with two sliding grooves 11 extending along the first direction. The first station 2 and the second station 3 both include a fixture fixing seat 7 for carrying the battery cell fixture 8. The bottom of the fixture fixing seat 7 has a connecting arm 71 that passes through the corresponding sliding groove 11 and is fixedly connected to the conveying seat 67. The interior of the connecting arm 71 is hollow. Locking seats 5 are fixedly provided on both sides of the connecting wall.

[0095] Decorative panel 68 is inserted through the hollow part of the connecting arm 71, and both ends of the decorative panel 68 are fixed to the inner walls of both ends of the slide groove 11 to cover the slide groove 11.

[0096] The platform body 1 is equipped with two independently driven conveyor modules 6, which are responsible for the Y-axis reciprocating conveying of the first station 2 and the second station 3, respectively. In each conveyor module 6, the support frame 61 provides the mounting base for each component, the servo motor 62 drives the drive wheel 63 to rotate, and the drive wheel 63 drives the driven wheel 64 to rotate synchronously through the synchronous belt 65. The synchronous belt 65 forms a closed-loop transmission between the drive wheel 63 and the driven wheel 64. The conveyor seat 67 is slidably mounted on the guide rail 66 by a slider. The guide rail 66 constrains the movement direction of the conveyor seat 67. The drive plate 671 fixes the conveyor seat 67 to one side of the synchronous belt 65, so that the movement of the synchronous belt 65 is directly transmitted to the conveyor seat 67. Two sliding grooves 11 opened at the top of the platform body 1 provide a movement channel for the connecting arm 71 of the fixture fixing seat 7. The connecting arm 71 passes through the sliding grooves 11 to fix the conveyor seat 67 and the fixture fixing seat 7 as one unit. The connecting arm 71 has a hollow structure inside. The decorative plate 68 is inserted through the hollow and fixed to the inner wall of the slide 11 at both ends. The decorative plate 68 covers the part of the slide 11 except for the position of the fixture fixing seat 7, which prevents foreign objects from falling into the slide 11 and does not interfere with the reciprocating movement of the fixture fixing seat 7 in the Y direction.

[0097] The two sets of conveying modules 6 are driven independently, and the movements of the first station 2 and the second station 3 do not interfere with each other, which can flexibly realize various working modes such as alternating switching or synchronous movement; the synchronous belt 65 provides smooth transmission, low noise, and fast response, and the guide rail 66 ensures conveying accuracy; the design of the decorative plate 68 and the hollow connecting arm 71 ensures effective dust prevention without affecting the full stroke movement of the fixture fixing seat 7. The structure is ingenious and takes into account both protection and functionality.

[0098] like Figure 1-7As shown, in some embodiments, each set of conveying modules 6 has two slotted photoelectric switches 69 spaced apart along the first direction on the support frame 61, corresponding to the welding position and the loading / unloading position respectively; the drive plate 671 is fixed with a sensing plate 672 that cooperates with the slotted photoelectric switch 69. When the sensing plate 672 moves with the conveyor seat 67 to trigger the corresponding slotted photoelectric switch 69, it indicates that the station has reached the welding position or the loading / unloading position.

[0099] like Figure 1-7 As shown, in some embodiments, the bottom of the main rack 433 is provided with a plurality of bushings 436, and a guide rod 412 that slides with the bushings 436 is fixed inside the base 41. The extension direction of the guide rod 412 is consistent with the axial direction of the transmission screw 432, which is used to improve the stability of the main rack 433 when it moves.

[0100] like Figure 1-7 As shown, in some embodiments, a limiting groove 411 is formed inside the base 41 corresponding to one side of each secondary rack 434. A sliding plate 435 is fixedly provided on one side of each secondary rack 434, and the sliding plate 435 is embedded in the limiting groove 411 and slides with it. This structure allows the secondary rack 434 to be suspended and supported in the limiting groove 411 by the sliding plate 435, forming an independent sliding guide structure. The secondary rack 434 does not directly rest on the main rack 433 or the gear part 429, avoiding additional friction between the secondary rack 434 and the main rack 433 or gear part 429 due to its own weight or vibration, thus improving the smoothness of transmission and service life.

[0101] like Figure 1-7 As shown, in some embodiments, a cover plate 49 is fixed to the top of the base 41 by several screws. The cover plate 49 has an internal clearance slot 491 for avoiding the secondary rack 434. The threaded hole 48 on the base 41 that mates with the screw portion 423 is completely integrated into the base 41 body and has no structural connection with the cover plate 49. When maintenance is required, after removing the cover plate 49, the secondary rack 434 can be pulled out horizontally, causing the slide plate 435 to disengage from the limiting groove 411, allowing the secondary rack 434 to be removed upwards. The screw portion 423 and the gear portion 429 can be independently disassembled by moving them inwards towards the locking groove 47. This structure enables quick disassembly and assembly of the internal transmission components of the locking mechanism 4, allowing for the replacement and maintenance of the secondary rack 434 and the locking actuator 42 without completely disassembling the base 41, facilitating future maintenance.

[0102] like Figure 1-7As shown, in some embodiments, a battery cell fixture 8 is also included. The battery cell fixture 8 is mounted on the top of the fixture fixing base 7, and the battery cell fixture 8 and the fixture fixing base 7 are positioned by a positioning structure. The positioning structure can adopt common positioning methods, such as setting a positioning pin on the top surface of the fixture fixing base 7 and opening a positioning hole on the bottom surface of the battery cell fixture 8 to cooperate with the positioning pin; or setting a positioning block on the top surface of the fixture fixing base 7 and opening a positioning groove on the bottom surface of the battery cell fixture 8 to cooperate with the positioning block; or using snap-fit, magnetic attraction, or other methods for positioning. The above positioning structure can limit the horizontal displacement of the battery cell fixture 8 relative to the fixture fixing base 7, ensuring that the battery cell fixture 8 will not move left or right or forward or backward during the reciprocating movement and locking process with the fixture fixing base 7, and will not affect the locking effect of the locking mechanism 4 on the workstation.

[0103] In summary, by fixing the locking mechanism 4 to the corresponding welding position on the platform body 1, the first station 2 and the second station 3 move independently along the first direction and alternately enter the welding position. When the first station 2 or the second station 3 moves to the welding position, the driving device 43 drives the locking head 421 to move towards the locking seat 5 on that station. The self-centering guide part 422 cooperates with the locking seat 5 to correct and lock the station to the welding position. After welding is completed, the locking mechanism 4 releases the current station, the station moves out of the welding position, and the other station moves in and is locked by the same locking mechanism 4, realizing the alternating locking of the two stations. The same locking mechanism 4 serves the two stations that alternately enter the welding position, reducing the number of locking mechanisms 4, making the structure compact, the control simple, and significantly improving the equipment utilization and welding efficiency.

[0104] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-station welding platform with alternating positioning and locking structure, characterized in that, include: Platform main body (1); The first station (2) and the second station (3) are movably disposed on the platform body (1) along the first direction, and the first station (2) and the second station (3) are adapted to move independently between the welding position and the loading and unloading position; The locking mechanism (4) includes a base (41) fixed on the platform body (1) and provided at the corresponding welding position, a locking actuator (42) movably provided on the base (41), and a driving device (43) for driving the locking actuator (42) to move. The locking actuator (42) has a locking head (421), and the front end of the locking head (421) is provided with a self-centering guide (422). The first station (2) and the second station (3) are respectively provided with locking seats (5) that cooperate with locking heads (421); When the first station (2) or the second station (3) moves to the welding position, the driving device (43) drives the locking head (421) to move towards the locking seat (5) on the station. The self-centering guide (422) and the locking seat (5) cooperate to correct and lock the station to the welding position.

2. The alternating positioning and locking structure of the dual-station welding platform according to claim 1, characterized in that: The locking head (421) moves axially via threaded transmission; the locking actuator (42) includes a screw part (423) that is threadedly engaged with the base (41), the locking head (421) is connected to one end of the screw part (423), and the driving device (43) drives the screw part (423) to rotate.

3. The alternating positioning and locking structure of the dual-station welding platform according to claim 1, characterized in that: A pressure sensor (424) is provided between the locking head (421) and the screw (423) to detect the pressure applied by the locking head (421) to the locking seat (5).

4. The alternating positioning and locking structure of the dual-station welding platform according to claim 3, characterized in that: The locking head (421) is connected to the screw part (423) via a floating connection structure, which allows the locking head (421) to be elastically compressed in the axial direction relative to the screw part (423). The pressure sensor (424) is disposed on the force transmission path between the locking head (421) and the screw part (423).

5. The alternating positioning and locking structure of the dual-station welding platform according to claim 4, characterized in that: The screw part (423) has an annular groove (425) at one end facing the locking head (421), and a pressure plate (426) is rotatably sleeved in the annular groove (425). The pressure sensor (424) is fixed on the side of the pressure plate (426) facing the locking head (421). The locking head (421) is fixedly connected to a plurality of guide shafts (427) at one end away from the self-centering guide part (422). The guide shafts (427) slide through the pressure plate (426) and extend to the other side of the pressure plate (426). Each of the guide shafts (427) is fitted with a spring (428), which is limited between the locking head (421) and the pressure plate (426). In the absence of external force, the spring (428) pushes the locking head (421) away from the pressure sensor (424) and maintains a gap between them. The annular groove (425), pressure plate (426), guide shaft (427) and spring (428) together constitute a floating connection structure.

6. The alternating positioning and locking structure of the dual-station welding platform according to claim 5, characterized in that: The screw part (423) is coaxially fixedly connected to the gear part (429) at one end away from the locking head (421); the driving device (43) includes a locking servo motor (431), a transmission screw (432) connected to the output end of the locking servo motor (431), a main rack (433) threadedly engaged with the transmission screw (432), and at least one secondary rack (434) meshing with the main rack (433). The end of the secondary rack (434) away from the main rack (433) meshes with the gear part (429); the locking servo motor (431) drives the transmission screw (432) to rotate, thereby causing the main rack (433) to move along the axial direction of the transmission screw (432), and then drives the gear part (429) to rotate through the secondary rack (434).

7. The alternating positioning and locking structure of the dual-station welding platform according to claim 5, characterized in that: The pressure plate (426) is also fixed with an anti-rotation rod (44) extending in the direction away from the locking head (421); the screw part (423) and the gear part (429) are provided with an axially penetrating receiving hole, and an anti-rotation seat (45) is fixedly provided in the base (41). The anti-rotation seat (45) passes through the receiving hole, and the screw part (423) and the gear part (429) can rotate relative to the anti-rotation seat (45); the anti-rotation seat (45) is provided with an axially penetrating anti-rotation hole (46), and the anti-rotation rod (44) is slidably fitted in the anti-rotation hole (46) to allow the pressure plate (426) to move axially with the screw part (423) while restricting its rotation.

8. The alternating positioning and locking structure of the dual-station welding platform according to claim 1, characterized in that: Locking grooves (47) are provided on both sides of the base (41) corresponding to the welding position. Each locking groove (47) has two oppositely arranged threaded holes (48) on its inner wall, for a total of four threaded holes (48). Each threaded hole (48) is fitted with a locking actuator (42). The gear part (429) of the four locking actuators (42) meshes with four corresponding secondary racks (434). The four secondary racks (434) mesh with the same main rack (433) so that the four locking actuators (42) can move synchronously to lock or release the work position located at the welding position from both sides.

9. The alternating positioning and locking structure of the dual-station welding platform according to claim 1, characterized in that: The self-centering guide part (422) is a conical surface, and the locking seat (5) is provided with a conical groove that matches the conical surface; the locking head (421) guides the work station to the welding position through the cooperation of the conical surface and the conical groove.

10. The alternating positioning and locking structure of the dual-station welding platform according to claim 1, characterized in that, The platform body (1) is provided with two sets of conveying modules (6), which respectively drive the first station (2) and the second station (3) to reciprocate along the first direction; each set of conveying modules (6) includes: The support frame (61) is fixed inside the platform body (1); A servo motor (62) is mounted on the support frame (61). The driving wheel (63) and the driven wheel (64) are arranged at intervals on the support frame (61) along the first direction, and the servo motor (62) drives the driving wheel (63) to rotate; A synchronous belt (65) is wound between the driving pulley (63) and the driven pulley (64); The guide rail (66) is disposed on the support frame (61) along the first direction; The conveyor seat (67) is slidably disposed on the guide rail (66) and is fixedly connected to one side of the synchronous belt (65) via the drive plate (671); The top of the platform body (1) is provided with two slide grooves (11) extending along the first direction. The first station (2) and the second station (3) both include a fixture fixing seat (7) for carrying the battery cell fixture (8). The bottom of the fixture fixing seat (7) has a connecting arm (71) that passes through the corresponding slide groove (11) and is fixedly connected to the conveyor seat (67). The interior of the connecting arm (71) is hollow. Decorative panel (68) is inserted through the hollow of the connecting arm (71), and the two ends of the decorative panel (68) are respectively fixed to the inner walls of the two ends of the slide (11) to cover the slide (11).

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