Mask ear band welding mechanism

Abstract

The mask ear band welding mechanism comprises a rack, a mask conveying device arranged on the rack and used for conveying a mask body, an ear band feeding mechanism arranged on the rack and used for feeding an ear band to a welding station, an ear band spot welding mechanism comprising a fixing frame, an ear band clamping assembly, an ear band transfer assembly, an ultrasonic welding assembly and a driving assembly arranged on the fixing frame, wherein the fixing frame is arranged at the welding station corresponding to the rack and located above the mask conveying device, and the driving assembly is used for sequentially driving the ear band clamping assembly, the ear band transfer assembly and the ultrasonic welding assembly to act. The cam linkage assembly is arranged to realize the action sequence of the ear band clamping assembly, the ear band transfer assembly and the ultrasonic welding assembly, so that the correlation of each mechanism is good, the welding of each processing action is interrelated, the processing rhythm is compact, the waiting time of each link is reduced, and the mask ear band welding production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of mask production and processing equipment technology, and in particular to a mask ear loop welding mechanism. Background Technology

[0002] A face mask is a hygiene product, generally worn over the mouth and nose to filter the air entering the mouth and nose, thus blocking harmful gases, odors, droplets, viruses, and other substances. It is also one of the methods to prevent respiratory infectious diseases. It typically has ear loops welded to both ends, with each ear loop welded to the top and bottom of the mask body. However, existing mask-making machines can only weld the ear loops manually on one side, then the operator flips the mask over to weld the other side. This demonstrates that the current manual method is extremely inefficient.

[0003] For example, patent CN212555080U discloses a mask ear loop welding machine. This device uses multiple lifting cylinders to control the lifting and lowering of the welding head and ear loop clamping mechanism to achieve simultaneous ear loop welding on both sides of the mask. While this method can solve the problem of low production efficiency caused by manual operation, all components that need to be lifted and moved on the entire welding equipment are controlled by cylinders. As a result, the large number of cylinders leads to a complex control system, high equipment cost, low transmission efficiency, and inability to guarantee accuracy. Summary of the Invention

[0004] In view of this, the present invention proposes a mask ear loop welding mechanism to solve the problems of complex structure and low transmission efficiency of existing ear loop welding equipment.

[0005] The technical solution of this invention is implemented as follows:

[0006] This invention provides a mask ear loop welding mechanism, comprising:

[0007] frame;

[0008] The mask conveying device, mounted on the frame, is used to transport the mask bodies.

[0009] The ear loop feeding mechanism is mounted on the frame and is used to feed ear loops to the welding station.

[0010] The ear loop spot welding mechanism includes a fixed frame and an ear loop clamping assembly, an ear loop transfer assembly, an ultrasonic welding assembly, and a cam linkage assembly mounted on the fixed frame; wherein the fixed frame is mounted at the welding station corresponding to the machine frame and is located above the mask conveying device.

[0011] Ear loop clamping assembly, used to clamp the ear loop at the welding station;

[0012] Ear loop transfer assembly, used to drive the ear loop clamping assembly to rotate to transfer the ear loop at the welding station to the welding point on the surface of the mask body;

[0013] Ultrasonic welding assembly, used for welding the ear loops at the welding points of the mask body;

[0014] The cam linkage assembly is used to drive the ear loop clamping assembly, ear loop transfer assembly and ultrasonic welding assembly to move sequentially.

[0015] Based on the above technical solution, preferably, the ear loop feeding mechanism includes an ear loop transmission component, an ear loop pulling component, and an ear loop cutting component; wherein...

[0016] The ear loop transmission assembly includes a wire device and a clamping device. The wire device is fixedly mounted on a fixed frame, and the clamping device is fixedly mounted on a frame. The wire device is used to transmit the ear loop to the clamping device, and the clamping device is used to clamp or loosen the ear loop.

[0017] The ear loop pulling assembly includes a linear cylinder and a first air gripper. The first air gripper is disposed on one side of the pressing device along the transmission direction of the mask conveying device. The linear cylinder is used to drive the first air gripper to grab the ear loop on the pressing device and pull it to a certain length.

[0018] The ear loop cutting assembly includes a cutting cylinder and scissors. The scissors are disposed between the clamping device and the ear loop clamping assembly. The cutting cylinder is used to drive the scissors to cut the ear loop.

[0019] Based on the above technical solution, preferably, the cam linkage assembly includes a rotating shaft, a reduction motor, a first cam, a second cam, a third cam, and a transmission assembly;

[0020] The rotating shaft is horizontally rotatable along the width of the frame and is mounted on the top of the fixed frame.

[0021] The geared motor is mounted on a fixed frame and rotatably connected to the middle of the rotating shaft;

[0022] The first cam, the second cam, and the transmission assembly are symmetrically arranged on the rotating shafts on both sides of the geared motor. The first cam is used to drive the ear loop clamping assembly to move up and down.

[0023] The second cam is connected to the end of the transmission assembly away from the rotating shaft, and is used to drive the ear loop transfer assembly to rotate so as to drive the ear loop clamping assembly to rotate to the welding point on the surface of the mask body;

[0024] The third cam is used to drive the ultrasonic welding assembly to move up and down.

[0025] Based on the above technical solution, preferably, the ear loop clamping assembly includes a mounting frame, a second pneumatic gripper, a first fixing plate, a first guide rod, a first spring, and a first pressing member;

[0026] The first fixing plate is horizontally fixed on the fixing frame;

[0027] The mounting bracket is located directly below the first fixing plate;

[0028] Two sets of second pneumatic grippers are symmetrically arranged and spaced apart at the bottom of the mounting frame along the length of the frame.

[0029] Two first guide rods are vertically arranged and spaced apart along the length of the frame. The lower end of the first guide rod moves through the first fixed plate and is fixedly connected to the mounting bracket. The upper ends of the two first guide rods are fixedly connected by the first pressing member.

[0030] The first spring is sleeved on the first guide rod between the first fixed plate and the first pressing member, and the first cam is in contact with the first pressing member.

[0031] Based on the above technical solution, preferably, the ear loop transfer assembly includes a moving plate, gears, a rotating shaft, rolling elements, and a slide rail;

[0032] The movable plate is slidably connected to the top of the mounting frame via a slide rail. The direction of translation of the movable plate is perpendicular to the width direction of the frame. Several teeth are provided on both sides of the width direction of the movable plate.

[0033] The rotating shaft is vertically mounted on the mounting bracket. One end of the rotating shaft is connected to the gear through gear meshing, and the lower end of the rotating shaft is fixedly connected to the second pneumatic gripper.

[0034] The rolling element is vertically mounted on the moving plate, and the second cam is horizontally mounted at the lower end of the transmission assembly and in contact with the surface of the rolling element. The height of the rolling element is greater than the vertical movement stroke of the ear strap clamping assembly.

[0035] Further, preferably, the transmission assembly includes a transmission rod, a first bevel gear, and a second bevel gear. The transmission rod is vertically rotatably mounted on a fixed frame. The upper end of the transmission rod is fixedly connected to the first bevel gear, and the lower end of the transmission rod is fixedly connected to a second cam. The second bevel gear is fixedly mounted on a rotating shaft and meshes with the first bevel gear.

[0036] Based on the above technical solution, preferably, the ultrasonic welding assembly includes a mounting plate, a second fixing plate, a second guide rod, a second spring, and a second pressing member;

[0037] The second fixing plate is horizontally fixed on the fixing frame, and the mounting plate is located directly below the second fixing plate;

[0038] Two sets of ultrasonic welding heads are provided, spaced apart along the length of the frame at the bottom of the mounting plate.

[0039] There are two vertically arranged second guide rods, spaced apart along the length of the frame. The lower end of the second guide rod moves through the second fixed plate and is fixedly connected to the mounting plate. The upper ends of the two second guide rods are fixedly connected by the second pressing member.

[0040] The second spring is sleeved on the second guide rod between the second fixed plate and the second pressing member, and the third cam is in contact with the second pressing member.

[0041] Furthermore, preferably, the top surface of the first pressing member is provided with a first groove, and a first roller connected to the first cam is vertically fixed in the first groove; the top surface of the second pressing member is provided with a second groove, and a second roller connected to the third cam is vertically fixed in the second groove; the rolling direction of the first roller and the second roller is consistent with the rotation direction of the rotating shaft.

[0042] Based on the above technical solution, preferably, the ear loop spot welding mechanism further includes a pressing component disposed between the two sets of ultrasonic welding components. The pressing component includes a pressure plate, a third fixing plate, a connecting plate, a connecting rod, and a buffer device. The connecting plate and the pressure plate are disposed above and below each other. The buffer device is disposed between the connecting plate and the pressure plate. The lower end of the connecting rod is fixedly connected to the connecting plate, and the upper end is fixedly connected to the second fixing plate through the third fixing plate. The bottom surface of the pressing plate is lower than the bottom surface of the ultrasonic welding head.

[0043] The present invention has the following advantages over the prior art:

[0044] The mask ear loop welding mechanism disclosed in this invention uses a cam linkage component and controls the movement of three cams through the same rotating shaft to realize the action sequence of the ear loop clamping component, ear loop transfer component and ultrasonic welding component. This makes the various mechanisms highly interconnected and the welding processes linked together, resulting in a compact processing rhythm, reducing the waiting time between each link, and greatly improving the production efficiency of mask ear loop welding.

[0045] Integrating the pressing component into the ultrasonic welding component eliminates the need for a cylinder, significantly reducing waiting time during the process and minimizing the need for a control system, thus lowering costs. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1This is a three-dimensional structural schematic diagram of the mask ear loop welding mechanism disclosed in this invention;

[0048] Figure 2 This is a schematic diagram of the assembly structure of the ear loop feeding mechanism and the ear loop spot welding structure disclosed in this invention;

[0049] Figure 3 This is a schematic diagram of the planar structure of the ear loop spot welding structure disclosed in this invention;

[0050] Figure 4 This is a three-dimensional structural diagram of the ear loop spot welding structure disclosed in this invention;

[0051] Figure 5 This is a schematic diagram of the assembly structure of the ear loop clamping assembly and ear loop transfer assembly disclosed in this invention;

[0052] Figure 6 This is a schematic diagram of the assembly structure of the ultrasonic welding assembly and the pressing assembly disclosed in this invention;

[0053] Figure label:

[0054] 1. Frame; 2. Mask conveying device; 3. Ear loop feeding mechanism; 4. Ear loop spot welding mechanism; 40. Fixing frame; 41. Ear loop clamping assembly; 42. Ear loop transfer assembly; 43. Ultrasonic welding assembly; 44. Cam linkage assembly; 31. Ear loop transmission assembly; 32. Ear loop pulling assembly; 33. Ear loop shearing assembly; 311. Wire device; 312. Pressing device; 321. Linear cylinder; 322. First pneumatic gripper; 331. Shearing cylinder; 332. Scissors; 441. Rotating shaft; 442. Gear motor; 443. First cam; 444. Second cam; 445. Third cam; 446. Transmission assembly; 411. Mounting frame; 412. Second pneumatic gripper; 413. First fixing plate; 414. 415. Guide rod; 416. First spring; 421. First pressing component; 422. Moving plate; 423. Gear; 424. Rotating shaft; 425. Rolling component; 421. Slide rail; 4211. Tooth; 4461. Transmission rod; 4462. First bevel gear; 4463. Second bevel gear; 430. Ultrasonic welding head; 431. Mounting plate; 432. Second fixing plate; 433. Second guide rod; 434. Second spring; 435. Second pressing component; 4161. First groove; 4162. First roller; 4351. Second groove; 4352. Second roller; 45. Pressing assembly; 451. Pressure plate; 452. Third fixing plate; 453. Connecting plate; 454. Connecting rod; 455. Buffer device. Detailed Implementation

[0055] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0056] like Figure 1 As shown, combined with Figure 2-4 The present invention discloses a mask ear loop welding mechanism, including a frame 1, a mask conveying device 2, an ear loop feeding mechanism 3 and an ear loop spot welding mechanism 4.

[0057] The mask conveying device 2 is installed on the frame 1 and is used to transport the mask body. In this embodiment, the mask conveying device 2 is a chain plate for transport, and there is an isolation plate between two adjacent chain plates to limit the translation of the mask body in the transport direction and ensure the positional accuracy of the mask during the transport process with the mask conveying device 2.

[0058] The ear loop feeding mechanism 3 is mounted on the frame 1 and is used to feed the ear loops to the welding station.

[0059] The ear loop spot welding mechanism 4 is fixedly installed above the mask conveying device 2 and is fixedly connected to the frame 1. The ear loop spot welding structure is used to weld the ear loops at the welding station to the mask body.

[0060] The ear loop spot welding mechanism 4 of this embodiment includes a fixed frame 40 and an ear loop clamping assembly 41, an ear loop transfer assembly 42, an ultrasonic welding assembly 43 and a cam linkage assembly 44 disposed on the fixed frame 40.

[0061] The fixing frame 40 is set at the welding station corresponding to the frame 1 and is located above the mask conveying device 2; the ear loop clamping assembly 41 is used to clamp the ear loop at the welding station; the ear loop transfer assembly 42 is used to drive the ear loop clamping assembly 41 to rotate to transfer the ear loop at the welding station to the welding point on the surface of the mask body; and the ultrasonic welding assembly 43 is used to weld the ear loop at the welding point of the mask body.

[0062] Since the ear loop clamping assembly 41, ear loop transfer assembly 42 and ultrasonic welding assembly 43 are all located above the mask conveying device 2, they need to be operated separately to complete the welding of the ear loops on the mask body. In the prior art, multiple cylinders are usually installed on the fixed frame 40 to drive the corresponding moving parts to perform actions. This method requires a large number of cylinder power sources, resulting in a complex control system, high equipment cost, low transmission efficiency, and inability to guarantee accuracy.

[0063] Therefore, this embodiment discloses a cam linkage assembly 44 to drive the ear loop clamping assembly 41, the ear loop transfer assembly 42, and the ultrasonic welding assembly 43 to operate sequentially. The cam linkage assembly 44 has a simple and compact structure, high transmission efficiency, and high precision, which improves production efficiency and is beneficial for mass production of products.

[0064] Specifically, the cam linkage assembly 44 includes a rotating shaft 441, a reduction motor 442, a first cam 443, a second cam 444, a third cam 445, and a transmission assembly 446.

[0065] The rotating shaft 441 is horizontally rotatable along the width of the frame 1 and is mounted on the top of the fixed frame 40.

[0066] The geared motor 442 is mounted on the fixed frame 40 and rotatably connected to the middle of the rotating shaft 441 to ensure that the geared motor 442 outputs a stable and reliable torque to the rotating shaft 441.

[0067] The first cam 443, the second cam 444, and the transmission assembly 446 are symmetrically arranged on the rotating shafts 441 on both sides of the geared motor 442. The first cam 443 is used to drive the ear loop clamping assembly 41 to move up and down.

[0068] The second cam 444 is connected to the end of the transmission assembly 446 away from the rotating shaft 441, and is used to drive the ear loop transfer assembly 42 to rotate so as to drive the ear loop clamping assembly 41 to rotate to the welding point on the surface of the mask body. In this embodiment, the moving direction of the ear loop transfer assembly 42 is perpendicular to the moving direction of the ear loop clamping assembly 41. Therefore, the transmission assembly 446 is provided between the rotating shaft 441 and the second cam 444, which can change the rotation direction of the second cam 444 and ensure that the second cam 444 rotates in the horizontal direction to drive the ear loop transfer assembly 42 to translate, thereby driving the component structure in the ear loop clamping assembly 41 to rotate, so as to realize that the horizontally clamped ear loop is bent into a U-shaped structure.

[0069] The third cam 445 is used to drive the ultrasonic welding assembly 43 to move up and down. The first cam 443, the second cam 444 and the third cam 445 are all disc cams.

[0070] In this embodiment, the contours of the first cam 443, the second cam 444, and the third cam 445 are set according to the action sequence and movement stroke of the ear loop clamping assembly 41, the ear loop transfer assembly 42, and the ultrasonic welding assembly 43. At the same time, it is ensured that the first cam 443, the second cam 444, and the third cam 445 can achieve conjugate linkage when driven by a rotating shaft 441, ensuring that the ear loop clamping assembly 41, the ear loop transfer assembly 42, and the ultrasonic welding assembly 43 move sequentially under the drive of the three cams, ensuring that each process is carried out in an orderly manner and is interconnected.

[0071] By controlling the movement of three cams through the same rotating shaft, the various mechanisms are well correlated and the welding processes are linked together, resulting in a compact processing rhythm, reduced waiting time between each stage, and greatly improved production efficiency of mask ear loop welding.

[0072] In this embodiment, the ear strap feeding mechanism 3 includes an ear strap transmission component 31, an ear strap pulling component 32, and an ear strap cutting component 33.

[0073] The ear loop transmission assembly 31 includes a wire guide device 311 and a clamping device 312. The wire guide device 311 is fixedly mounted on the mounting frame 40, and the clamping device 312 is fixedly mounted on the frame 1. The wire guide device 311 is used to transmit the ear loops to the clamping device 312, and the clamping device 312 is used to clamp or loosen the ear loops. In some embodiments, the wire guide device 311 includes a wire guide rod, a traction wheel, a guide wheel, and a tension adjusting device for adjusting the tension of the ear loop wire, ensuring consistent tension of the ear loops during transmission, thereby ensuring consistent and stable ear loop supply.

[0074] The ear loop pulling assembly 32 includes a linear cylinder 321 and a first air gripper 322. The first air gripper 322 is arranged on one side of the pressing device 312 along the transmission direction of the mask conveying device 2. The linear cylinder 321 is used to drive the first air gripper 322 to grab the ear loop on the pressing device 312 and pull it to a certain length.

[0075] The ear loop cutting assembly 33 includes a cutting cylinder 331 and scissors 332. The scissors 332 are disposed between the clamping device 312 and the ear loop clamping assembly 41. The cutting cylinder 331 is used to drive the scissors 332 to cut the ear loop.

[0076] Using the above technical solution, the ear loop is conveyed to the clamping device 312 through the wire device 311. The clamping device 312 clamps the end of the ear loop. At this time, the linear cylinder 321 in the ear loop pulling assembly 32 drives the first air gripper 322 to move horizontally and approach the clamping device 312. The first air gripper 322 opens and clamps the end of the ear loop. The clamping device 312 releases, the linear cylinder 321 retracts, and the first air gripper 322 pulls the ear loop to a certain length. Finally, the shearing cylinder 331 drives the scissors 332 to cut the ear loop.

[0077] This embodiment illustrates a preferred implementation of the cooperation between the ear strap clamping assembly 41 and the cam linkage assembly 44. For details, please refer to the attached diagram. Figure 5 As shown, the ear loop clamping assembly 41 includes a mounting bracket 411, a second pneumatic gripper 412, a first fixing plate 413, a first guide rod 414, a first spring 415, and a first pressing member 416.

[0078] The first fixed plate 413 is horizontally fixed on the fixed frame 40. The mounting frame 411 is located directly below the first fixed plate 413. Two sets of second pneumatic grippers 412 are symmetrically arranged and spaced apart at the bottom of the mounting frame 411 along the length of the frame 1. Two first guide rods 414 are vertically arranged and spaced apart along the length of the frame 1. The lower end of the first guide rod 414 moves through the first fixed plate 413 and is fixedly connected to the mounting frame 411. The upper ends of the two first guide rods 414 are fixedly connected by the first pressing member 416. The first spring 415 is sleeved on the first guide rod 414 between the first fixed plate 413 and the first pressing member 416. The first cam 443 is in contact with the first pressing member 416.

[0079] Using the above technical solution, during the rotation of the rotating shaft 441, the first cam 443 is driven to rotate. The pushing fan surface of the first cam 443 drives the first pressing member 416 to move downward and compress the first elastic. During the downward movement of the first pressing member 416, the mounting bracket 411 and the two sets of second pneumatic grippers 412 are driven to move downward, thereby clamping the straight ear strap conveyed directly below the ear strap clamping assembly 41.

[0080] After the ear strap is clamped, it needs to be bent into a U-shaped structure. In this embodiment, this is achieved by the ear strap transfer assembly 42. Specifically, the ear strap transfer assembly 42 includes a moving plate 421, a gear 422, a rotating shaft 423, a rolling element 424, and a slide rail 425.

[0081] The movable plate 421 is slidably connected to the top of the mounting frame 411 via a slide rail 425. The translation direction of the movable plate 421 is perpendicular to the width direction of the frame 1. Several teeth 4211 are provided on both sides of the movable plate 421 in the width direction. The rotating shaft 423 is vertically rotatably mounted on the mounting frame 411. One end of the rotating shaft 423 is meshed with the teeth 4211 via a gear 422. The lower end of the rotating shaft 423 is fixedly connected to the second pneumatic gripper 412. The rolling element 424 is vertically mounted on the movable plate 421. The second cam 444 is horizontally mounted at the lower end of the transmission assembly 446 and contacts the surface of the rolling element 424. The height of the rolling element 424 is greater than the vertical movement stroke of the ear strap clamping assembly 41.

[0082] Using the above technical solution, while the rotating shaft 441 rotates, the transmission assembly 446 drives the second cam 444 to rotate. During the rotation of the second cam 444, it rolls horizontally with the rolling element 424. At the same time, due to the eccentric rotation of the cam, the moving plate 421 moves relative to the top of the mounting bracket 411 towards the middle of the width direction of the frame 1. During the translation, the teeth 4211 on both sides of the moving plate 421 drive the gears 422 to rotate in opposite directions. The two gears 422 rotate in opposite directions, and the two gears 422 drive the lower second pneumatic grippers 412 to rotate by rotating, thereby causing the two second pneumatic grippers 412 to rotate 90°.

[0083] It is worth noting that when the pushing sector surface of the first cam 443 is rotating, the pushing sector surface of the second cam 444 does not contact the rolling element 424. When the pushing sector surface of the first cam 443 completes its rotation, the pushing sector surface of the second cam 444 begins to push the rolling element 424.

[0084] In this embodiment, preferably, the transmission assembly 446 includes a transmission rod 4461, a first bevel gear 4462, and a second bevel gear 4463. The transmission rod 4461 is vertically rotatably mounted on a fixed frame 40. The upper end of the transmission rod 4461 is fixedly connected to the first bevel gear 4462, and the lower end of the transmission rod 4461 is fixedly connected to a second cam 444. The second bevel gear 4463 is fixedly mounted on the rotating shaft 441 and meshes with the first bevel gear 4462. Thus, during the rotation of the rotating shaft 441, the rotation direction of the rotating shaft 441 is transmitted to the transmission rod 4461 through the meshing of the two bevel gears 4462, causing the transmission rod 4461 to rotate vertically, thereby driving the second cam 444 to rotate horizontally.

[0085] In this embodiment, refer to the appendix Figure 6 As shown, the ultrasonic welding assembly 43 includes a mounting plate 431, a second fixing plate 432, a second guide rod 433, a second spring 434, and a second pressing member 435. The second fixing plate 432 is horizontally fixed on the fixing frame 40, and the mounting plate 431 is located directly below the second fixing plate 432. Two sets of ultrasonic welding heads 430 are provided, spaced apart along the length of the frame 1 at the bottom of the mounting plate 431. Two second guide rods 433 are vertically arranged, spaced apart along the length of the frame 1. The lower end of the second guide rod 433 moves through the second fixing plate 432 and is fixedly connected to the mounting plate 431. The upper ends of the two second guide rods 433 are fixedly connected to each other through the second pressing member 435. The second spring 434 is sleeved on the second guide rod 433 between the second fixing plate 432 and the second pressing member 435, and the third cam 445 is in contact with the second pressing member 435.

[0086] Using the above technical solution, when the two second air grippers 412 clamp the ear loops and rotate 90°, the two free ends of the ear loops are directly above the welding point of the mask body. At this time, during the rotation of the third cam 445, the second pressing member 435 is pressed down, and the second pressing member 435 compresses the second spring 434 to drive the mounting plate 431 to press down, thereby driving the two ultrasonic welding heads 430 to move downward to perform ultrasonic heat fusion welding on the ear loops of the mask body.

[0087] It is worth noting that when the pushing sector surface of the second cam 444 is rotating, the pushing sector surface of the third cam 445 is not in contact with the second roller 4352. When the pushing sector surface of the second cam 444 completes its rotation, the pushing sector surface of the third cam 445 begins to push the second roller 4352. The first cam 443, the second cam 444 and the third cam 445 are interconnected and sequentially push the corresponding parts to move, ensuring that the mechanisms are carried out in an orderly and compact manner, and improving the accuracy of each action.

[0088] In this embodiment, the top surface of the first pressing member 416 is provided with a first groove 4161, and a first roller 4162 connected to the first cam 443 is vertically fixedly disposed in the first groove 4161. The top surface of the second pressing member 435 is provided with a second groove 4351, and a second roller 4352 connected to the third cam 445 is vertically fixedly disposed in the second groove 4351. The rolling direction of the first roller 4162 and the second roller 4352 is consistent with the rotation direction of the rotating shaft 441. By providing the groove, the cam can abut against the surface of the groove during the cam's rotation, thereby allowing the pressing member to slowly move up and down. The ball bearings make the contact between the cam and the ball bearings more stable.

[0089] In some embodiments, the mask body needs to be pressed before the ear loops are welded. In the prior art, a cylinder is used to drive the pressure plate 451 to move up and down to press the mask body. This process also involves a cylinder, which increases the control procedures and costs.

[0090] Therefore, the solution adopted in this embodiment is as follows: the ear loop spot welding mechanism 4 further includes a pressing component 45 disposed between the two sets of ultrasonic welding components 43, as shown in the attached figure. Figure 6 As shown, the pressing assembly 45 includes a pressure plate 451, a third fixing plate 452, a connecting plate 453, a connecting rod 454, and a buffer device 455. The connecting plate 453 and the pressure plate 451 are arranged vertically, and the buffer device 455 is arranged between the connecting plate 453 and the pressure plate 451. The lower end of the connecting rod 454 is fixedly connected to the connecting plate 453, and the upper end is fixedly connected to the second fixing plate 432 through the third fixing plate 452. The bottom surface of the pressing plate 451 is lower than the bottom surface of the ultrasonic welding head 430.

[0091] Using the above technical solution, the pressing component 45 in this embodiment is directly connected to the ultrasonic welding component 43. When the ultrasonic welding component 43 moves downward, it drives the entire pressing component 45 to move downward. Since the bottom surface of the pressing plate 451 is lower than the ultrasonic welding head 430, the pressing plate 451 contacts the mask body first. During the continuous pressing process, the buffer device 455 can shorten the distance between the connecting plate 453 and the pressing plate 451, which plays a buffering role, thereby ensuring that the mask body is fixed in position during the ultrasonic welding head 430 welding process.

[0092] By using the above technical solution, the pressing component 45 can be directly integrated into the ultrasonic welding component 43 without the need for a cylinder, which can greatly reduce the waiting time in the process and reduce the need for a control system, thus lowering costs.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 mask ear loop welding mechanism, characterized in that, include: Rack (1); A mask conveying device (2) is installed on the frame (1) and is used to convey the mask body; The ear loop feeding mechanism (3) is set on the frame (1) and is used to feed the ear loop to the welding station; The ear loop spot welding mechanism (4) includes a fixed frame (40) and an ear loop clamping assembly (41), an ear loop transfer assembly (42), an ultrasonic welding assembly (43) and a drive assembly (44) disposed on the fixed frame (40); wherein the fixed frame (40) is disposed at the welding station corresponding to the frame (1) and is located above the mask conveying device (2); Ear loop clamping assembly (41) is used to clamp the ear loop at the welding station; Ear loop transfer assembly (42) is used to drive the ear loop clamping assembly (41) to rotate to transfer the ear loop at the welding station to the welding point on the surface of the mask body; An ultrasonic welding assembly (43) is used to weld the ear loops at the welding point of the mask body; The cam linkage assembly (44) is used to drive the ear strap clamping assembly (41), the ear strap transfer assembly (42) and the ultrasonic welding assembly (43) to move sequentially; The cam linkage assembly (44) includes a rotating shaft (441), a reduction motor (442), a first cam (443), a second cam (444), a third cam (445), and a transmission assembly (446); The rotating shaft (441) is horizontally rotatable along the width direction of the frame (1) and is mounted on the top of the fixed frame (40); The geared motor (442) is mounted on the fixed frame (40) and rotatably connected to the middle of the rotating shaft (441); The first cam (443), the second cam (444) and the transmission assembly (446) are symmetrically arranged on the rotating shaft (441) on both sides of the geared motor (442). The first cam (443) is used to drive the ear loop clamping assembly (41) to move up and down. The second cam (444) is connected to the end of the transmission assembly (446) away from the rotating shaft (441) and is used to drive the ear loop transfer assembly (42) to rotate so as to drive the ear loop clamping assembly (41) to rotate to the welding point on the surface of the mask body. The third cam (445) is used to drive the ultrasonic welding assembly (43) to move up and down. The first cam (443), the second cam (444), and the third cam (445) move in sequence. The ear loop clamping assembly (41) includes a mounting bracket (411), a second pneumatic gripper (412), a first fixing plate (413), a first guide rod (414), a first spring (415), and a first pressing member (416); The first fixing plate (413) is horizontally fixed on the fixing frame (40); The mounting bracket (411) is located directly below the first fixing plate (413); Two sets of second pneumatic grippers (412) are symmetrically arranged and spaced apart at the bottom of the mounting frame (411) along the length of the frame (1); Two first guide rods (414) are vertically arranged and spaced apart along the length of the frame (1). The lower end of the first guide rod (414) moves through the first fixed plate (413) and is fixedly connected to the mounting bracket (411). The upper ends of the two first guide rods (414) are fixedly connected to each other by the first pressing member (416). The first spring (415) is sleeved on the first guide rod (414) between the first fixed plate (413) and the first pressing member (416), and the first cam (443) is in contact with the first pressing member (416); The ear loop transfer assembly (42) includes a moving plate (421), a gear (422), a rotating shaft (423), a rolling element (424), and a slide rail (425); The top of the movable plate (421) and the mounting frame (411) are slidably connected by a slide rail (425). The translation direction of the movable plate (421) is perpendicular to the width direction of the frame (1). Several teeth (4211) are provided on both sides of the width direction of the movable plate (421). The rotating shaft (423) is vertically rotatably mounted on the mounting bracket (411). One end of the rotating shaft (423) is connected to the teeth (4211) through the gear (422), and the lower end of the rotating shaft (423) is fixedly connected to the second pneumatic gripper (412). The rolling element (424) is vertically mounted on the moving plate (421), and the second cam (444) is horizontally mounted at the lower end of the transmission assembly (446) and in contact with the surface of the rolling element (424). The height of the rolling element (424) is greater than the vertical movement stroke of the ear strap clamping assembly (41). The transmission assembly (446) includes a transmission rod (4461), a first bevel gear (4462), and a second bevel gear (4463). The transmission rod (4461) is mounted on a fixed frame (40) that rotates vertically. The upper end of the transmission rod (4461) is fixedly connected to the first bevel gear (4462), and the lower end of the transmission rod (4461) is fixedly connected to the second cam (444). The second bevel gear (4463) is fixedly mounted on the rotating shaft (441) and meshes with the first bevel gear (4462). When the pushing sector of the first cam (443) is rotating, the pushing sector of the second cam (444) does not contact the rolling element (424). When the pushing sector of the first cam (443) completes the rotation, the pushing sector of the second cam (444) begins to push the rolling element (424). The ultrasonic welding assembly (43) includes a mounting plate (431), a second fixing plate (432), a second guide rod (433), an ultrasonic welding head (430), a second spring (434), and a second pressing member (435); the top surface of the second pressing member (435) is provided with a second groove (4351), and a second roller (4352) connected to the third cam (445) is vertically fixed in the second groove (4351); When the pushing sector of the second cam (444) is rotating, the pushing sector of the third cam (445) is not in contact with the second roller (4352). When the pushing sector of the second cam (444) completes its rotation, the pushing sector of the third cam (445) begins to push the second roller (4352). The first cam (443), the second cam (444), and the third cam (445) are interconnected and sequentially push the corresponding components to move. The second fixing plate (432) is horizontally fixed on the fixing frame (40), and the mounting plate (431) is located directly below the second fixing plate (432); Two sets of ultrasonic welding heads (430) are provided, which are spaced apart at the bottom of the mounting plate (431) along the length of the frame (1); There are two vertically arranged second guide rods (433), which are spaced apart along the length of the frame (1). The lower end of the second guide rod (433) moves through the second fixed plate (432) and is fixedly connected to the mounting plate (431). The upper ends of the two second guide rods (433) are fixedly connected to each other by the second pressing member (435). The second spring (434) is sleeved on the second guide rod (433) between the second fixed plate (432) and the second pressing member (435), and the third cam (445) is in contact with the second pressing member (435); The ear loop spot welding mechanism (4) further includes a pressing component (45) disposed between two sets of ultrasonic welding components (43). The pressing component (45) includes a pressure plate (451), a third fixing plate (452), a connecting plate (453), a connecting rod (454), and a buffer device (455). The connecting plate (453) and the pressure plate (451) are arranged vertically. The buffer device (455) is disposed between the connecting plate (453) and the pressure plate (451). The lower end of the connecting rod (454) is fixedly connected to the connecting plate (453), and the upper end is fixedly connected to the second fixing plate (432) through the third fixing plate (452). The bottom surface of the pressing plate (451) is lower than the bottom surface of the ultrasonic welding head (430).

2. The mask ear loop welding mechanism as described in claim 1, characterized in that: The ear loop feeding mechanism (3) includes an ear loop transmission assembly (31), an ear loop pulling assembly (32), and an ear loop cutting assembly (33); wherein, The ear loop transmission assembly (31) includes a wire device (311) and a clamping device (312). The wire device (311) is fixedly mounted on the fixed frame (40), and the clamping device (312) is fixedly mounted on the frame (1). The wire device (311) is used to transmit the ear loop to the clamping device (312), and the clamping device (312) is used to clamp or loosen the ear loop. The ear loop pulling assembly (32) includes a linear cylinder (321) and a first air gripper (322). The first air gripper (322) is arranged on one side of the pressing device (312) along the transmission direction of the mask conveying device (2). The linear cylinder (321) is used to drive the first air gripper (322) to grab the ear loop on the pressing device (312) and pull it to a certain length. The ear loop cutting assembly (33) includes a cutting cylinder (331) and scissors (332). The scissors (332) are disposed between the clamping device (312) and the ear loop clamping assembly (41). The cutting cylinder (331) is used to drive the scissors (332) to cut the ear loop.

3. The mask ear loop welding mechanism as described in claim 1, characterized in that: The top surface of the first pressing member (416) is provided with a first groove (4161), and a first roller (4162) connected to the first cam (443) is vertically fixed in the first groove (4161). The rolling direction of the first roller (4162) and the second roller (4352) is consistent with the rotation direction of the rotating shaft (441).

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