Multi-station ultrasonic welding device

Abstract

The invention relates to the technical field of welding devices, in particular to a multi-station ultrasonic welding device which comprises a rack, a rotating shaft is rotationally arranged on the rack, a rotating disc is arranged on the rotating shaft, a plurality of ultrasonic welding assemblies are slidably arranged on the rotating disc at equal intervals in an annular array mode, and a plurality of bottom die assemblies are arranged on the rotating disc at equal intervals in an annular array mode. An eccentric bearing assembly is arranged on the rack and located on one side of the rotary disc, and an opening and closing wheel is arranged on the rack and located on the other side of the rotary disc. The ultrasonic welding assembly is hinged to the eccentric bearing assembly, and the bottom die assembly is in transmission connection with the opening and closing wheel. On the premise that the same welding strength is guaranteed, welding can be conducted at a higher speed, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and more specifically, to a multi-station ultrasonic welding device. Background Art

[0002] Straight products such as sanitary napkins and diapers are continuously produced in the form of rolls during the production process. In one of the links, ultrasonic welding technology is required to weld and fuse non-woven materials, fiber materials or plastics, so that different layers of materials are partially or completely welded into one.

[0003] The existing ultrasonic welding device is only equipped with a single-station ultrasonic welding machine to weld straight products (a type of workpiece). The welding strength is about 8N / (25mm*5mm) and the maximum welding capacity is about 200 pieces / min. If welding is performed at a faster speed, the welding strength will be reduced and will not meet the use requirements. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a multi-station ultrasonic welding device that can perform welding at a faster speed while ensuring the same welding strength, thereby improving production efficiency.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A multi-station ultrasonic welding device comprises a frame, a rotating shaft is rotatably arranged on the frame, a rotating disk is arranged on the rotating shaft, a plurality of ultrasonic welding components are slidably arranged in an annular array at equal intervals on the rotating disk, and a plurality of bottom mold components corresponding to the ultrasonic welding components are arranged in an annular array at equal intervals on the rotating disk; an eccentric bearing component for driving the ultrasonic welding component to slide back and forth is arranged on the frame and on one side of the rotating disk, and an opening and closing wheel for driving the bottom mold component to movably press against the ultrasonic welding component and then weld the workpiece is arranged on the frame and on the other side of the rotating disk; the ultrasonic welding component is hinged to the eccentric bearing component, and the bottom mold component is transmission-connected to the opening and closing wheel.

[0007] Optionally, the ultrasonic welding assembly includes a first mounting plate, a second mounting plate, a linear slide assembly, an ultrasonic welding machine, and a cylinder; the fixed end of the linear slide assembly is fixedly connected to the first mounting plate, and the sliding end thereof is fixedly connected to the bottom surface of the second mounting plate; the front surface of the second mounting plate is fixedly connected to the ultrasonic welding machine; the protruding end of the cylinder is hinged to the second mounting plate, and the cylinder seat end of the cylinder is hinged to the eccentric bearing assembly; the sliding direction of the ultrasonic welding machine coincides with the radial direction of the turntable, and the ultrasonic welding machine is provided with a welding head for movably pressing against the workpiece; the first mounting plate is fixedly connected to the turntable.

[0008] Optionally, the bottom mold assembly includes a third mounting plate located at the outer edge of the turntable, a bottom mold for movably pressing against the welding head to weld the workpiece, an L-shaped rocker arm for driving the bottom mold to rotate, and a follower bearing for driving the L-shaped rocker arm to rotate; the third mounting plate is fixedly connected to the turntable, and a welding head hole for the welding head to pass through is provided in the middle thereof; the L-shaped rocker arm is rotatably connected to one end of the third mounting plate close to the opening and closing wheel; the end of the L-shaped rocker arm away from the rotating shaft is fixedly connected to the bottom mold, and the end close to the rotating shaft is fixedly connected to the inner ring of the follower bearing; an opening and closing groove for accommodating the follower bearing and driving the follower bearing to rotate reciprocatingly is provided on the outer wall of the opening and closing wheel, and the side wall of the opening and closing groove movably presses against the outer ring of the follower bearing.

[0009] Optionally, a rocker seat for enhancing the stability of the L-shaped rocker is provided on the third mounting plate; the L-shaped rocker passes through the rocker seat and is rotatably connected to the rocker seat; a limit seat for assisting the bottom mold to align the welding head is provided at one end of the third mounting plate away from the closing wheel.

[0010] Optionally, the eccentric bearing assembly includes a bearing, an eccentric bearing seat for fixing the bearing on a frame, and a bearing sleeve for driving the cylinder to move; the inner ring of the bearing is sleeved with the outer ring of the eccentric bearing seat, and the inner ring of the bearing sleeve is sleeved with the outer ring of the bearing; the eccentric bearing seat is fixedly connected to the frame, and the cylinder seat end of the cylinder is hinged to the outer ring of the bearing sleeve.

[0011] Optionally, the inner ring of the eccentric bearing seat is sleeved with the rotating shaft, and there is a gap between the inner ring and the outer wall of the rotating shaft.

[0012] Optionally, a transmission wheel is provided at the end of the rotating shaft for transmitting with an external driving device to drive the rotating shaft to rotate.

[0013] Optionally, a rotating joint is provided at the end of the rotating shaft.

[0014] In summary, the present invention has the following beneficial effects: the workpiece moves to the outer edge of the turntable under the action of the external power device, and the linear speed of the workpiece movement is close to the linear speed of the outer edge of the turntable, so that the part to be welded of the workpiece and the welding head in the ultrasonic welding assembly and the bottom mold in the bottom mold assembly are approximately in a relatively static state, and then welding of one station is performed. Multiple ultrasonic welding assemblies and the corresponding bottom mold assemblies rotate with the turntable around the rotating shaft, and the coil formed by connecting multiple workpieces end to end is welded by rotating and welding. Under the premise of ensuring the same welding strength, welding can be performed at a faster speed, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention;

[0016] Figure 2 is a top view of the present invention;

[0017] Figure 3 It is a front view of the present invention;

[0018] Figure 4 yes Figure 3 Sectional view at section AA;

[0019] Figure 5 It is a schematic diagram of the partial structure of the ultrasonic welding assembly in the present invention;

[0020] Figure 6 It is a partial assembly diagram of the opening and closing wheel and the bottom mold assembly in the present invention;

[0021] Figure 7 It is a partial assembly diagram of the eccentric bearing assembly and the ultrasonic welding assembly in the present invention;

[0022] Figure 8 A partial cross-sectional view of the eccentric bearing assembly and the ultrasonic welding assembly of the present invention.

[0023] In the figure: 1. frame; 2. rotating shaft; 21. driving wheel; 22. rotating joint; 3. turntable; 4. ultrasonic welding assembly; 41. first mounting plate; 42. second mounting plate; 421. connecting protrusion; 43. linear slide assembly; 431. rail; 432. slider; 44. ultrasonic welding machine; 441. welding head; 45. cylinder; 5. bottom mold assembly; 51. third mounting plate; 52. bottom mold; 53. L-shaped rocker arm; 54. follower bearing; 55. rocker arm seat; 56. limit seat; 6. eccentric bearing assembly; 61. bearing; 62. eccentric bearing seat; 63. eccentric bearing sleeve; 631. hinge block; 7. opening and closing wheel; 71. opening and closing groove; 8. workpiece. DETAILED DESCRIPTION

[0024] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0026] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "vertical", "horizontal", "left", "right", "above", "below" and similar expressions are for illustrative purposes only, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] The present invention provides a multi-station ultrasonic welding device, such as Figure 1-8 As shown, it includes a frame 1, a rotating shaft 2 is rotatably arranged on the frame 1, a turntable 3 is arranged on the rotating shaft 2, a plurality of ultrasonic welding components 4 are slidably arranged in an annular array at equal intervals on the turntable 3, and a plurality of bottom mold components 5 corresponding to the ultrasonic welding components 4 are arranged in an annular array at equal intervals on the turntable 3; an eccentric bearing component 6 for driving the ultrasonic welding component 4 to slide back and forth is arranged on the frame 1 and located on one side of the turntable 3, and an opening and closing wheel 7 for driving the bottom mold component 5 to move against the ultrasonic welding component 4 and then weld the workpiece 8 is arranged on the frame 1 and located on the other side of the turntable 3; the ultrasonic welding component 4 is hinged to the eccentric bearing component 6, and the bottom mold component 5 is connected to the opening and closing wheel 7 in transmission connection.

[0029] In this embodiment, the frame 1 is composed of a bottom plate and two vertical plates, the two vertical plates are spaced a certain distance apart for mounting the turntable 3, the turntable 3 is composed of two circular plates and a connecting plate for being located between the two circular plates, the middle of the rotating shaft 2 passes through the center of the turntable 3 and is fixed by a conventional key connection, and the two ends of the rotating shaft 2 are connected to the frame 1 through conventional bearings to achieve transmission connection. The ultrasonic welding assembly 4 is fixedly installed between the two circular plates of the turntable 3 by screws, and the number can be selected according to actual needs. The number in this embodiment is six. The ultrasonic welding assembly 4 reciprocates in the radial direction of the turntable 3 under the drive of the eccentric bearing assembly 6, and the eccentric bearing assembly 6 is fixedly installed on the frame 1 by screws and is located on one outer side of the turntable 3. The bottom mold assembly 5 is fixedly installed on the other outer side of the turntable 3 by screws, and the bottom mold assembly 5 can reciprocate under the drive of the opening and closing wheel 7; the opening and closing wheel 7 is fixedly installed on the frame 1 by screws, and is coaxially arranged with the rotating shaft 2, the turntable 3, and the eccentric bearing assembly 6. When the movable end of the bottom mold component 5 and the movable end of the ultrasonic welding component 4 are close to each other, the workpiece 8 can be clamped. Here, the workpiece 8 refers to a straight strip product such as a sanitary napkin made of non-woven fabric material, fiber material or plastic.

[0030] like Figure 3 As shown, the workpiece 8 moves to the outer edge of the turntable 3 under the action of the external power device, and the linear speed of the workpiece 8 is close to the linear speed of the outer edge of the turntable 3, so that the part to be welded of the workpiece 3 and the welding head 441 in the ultrasonic welding assembly 4 and the bottom mold 52 in the bottom mold assembly 5 are approximately in a relatively static state, and then one-station welding is performed. Multiple ultrasonic welding assemblies 4 and the corresponding bottom mold assemblies 5 rotate with the turntable 3 around the rotating shaft 2, and the coil formed by connecting multiple workpieces 8 end to end is welded in a rotating and welding manner. Under the premise of ensuring the same welding strength, welding can be performed at a faster speed, thereby improving production efficiency.

[0031] Furthermore, the ultrasonic welding assembly 4 includes a first mounting plate 41, a second mounting plate 42, a linear slide assembly 43, an ultrasonic welding machine 44, and a cylinder 45; the fixed end of the linear slide assembly 43 is fixedly connected to the first mounting plate 41, and the sliding end thereof is fixedly connected to the bottom surface of the second mounting plate 42; the front surface of the second mounting plate 42 is fixedly connected to the ultrasonic welding machine 44; the protruding end of the cylinder 45 is hinged to the second mounting plate 42, and the cylinder seat end of the cylinder 45 is hinged to the eccentric bearing assembly 6; the sliding direction of the ultrasonic welding machine 44 coincides with the radial direction of the turntable 3, and the ultrasonic welding machine 44 is provided with a welding head 441 for movably pressing against the workpiece 8; the first mounting plate 41 is fixedly connected to the turntable 3.

[0032] like Figure 1-5As shown, the first mounting plate 41 is fixedly mounted between the two circular plates of the turntable 3 by being implemented, and the first mounting plate 41 also plays the role of connecting the two circular plates of the turntable 3; the upper surface of the first mounting plate 41 is fixedly mounted with two linear slide rail assemblies 43 by screws, and the linear slide rail assembly 43 is a conventional accessory in the mechanical field, generally including a steel rail 431 and at least one slider 432 slidably buckled on the steel rail 431. The second mounting plate 42 is fixedly mounted on the four sliders 432 by screws, and the upper surface of the second mounting plate 42 is fixedly mounted with an ultrasonic welding machine 44 by screws. The ultrasonic welding machine 44 is a common ultrasonic welding machine in the prior art, and generally includes a welding head 441, a horn, a transducer and other components. The specific structure and connection relationship of each component can be referred to the ultrasonic welding device disclosed in CN217454965U2, which will not be repeated here. A connecting protrusion 421 is integrally formed on the second mounting plate 42 . The connecting protrusion 421 penetrates the circular plate of the rotating disk 3 from the inside to the outside and is hinged to the extended end of the cylinder 45 on the outside of the circular plate through a pin.

[0033] Furthermore, the bottom mold assembly 5 includes a third mounting plate 51 located at the outer edge of the turntable 3, a bottom mold 52 for movably pressing against the welding head 441 to weld the workpiece 8, an L-shaped rocker arm 53 for driving the bottom mold 52 to rotate, and a follower bearing 54 for driving the L-shaped rocker arm 53 to rotate; the third mounting plate 51 is fixedly connected to the turntable 3, and a welding head hole for the welding head 441 to pass through is opened in the middle thereof; the L-shaped rocker arm 53 is rotatably connected to one end of the third mounting plate 51 close to the opening and closing wheel 7; the end of the L-shaped rocker arm 53 away from the rotating shaft 2 is fixedly connected to the bottom mold 52, and the end close to the rotating shaft 2 is fixedly connected to the inner ring of the follower bearing 54; an opening and closing groove 71 for accommodating the follower bearing 54 and driving the follower bearing 54 to rotate reciprocatingly is opened on the outer wall of the opening and closing wheel 7, and the side wall of the opening and closing groove 71 is movably pressed against the outer ring of the follower bearing 54.

[0034] like Figure 1-8 As shown, both ends of the third mounting plate 51 are fixed to the turntable 3 by screws, and a welding head hole slightly larger than the welding head 441 is opened in the middle thereof. After the welding head 441 passes through the welding head hole, it can abut the workpiece 8. The L-shaped rocker 53 is an L-shaped rocker, and its upper end is rotatably mounted on the third mounting plate 51 through a bearing, and its lower end is fixedly connected to the inner ring fixed by the follower bearing 54 through screws. The axis of the follower bearing 54 is not colinear with the rotation axis of the L-shaped rocker 53, so that the follower bearing 54 can rotate along the rotation axis of the L-shaped rocker 53. A through hole for the rotating shaft 2 to pass through is opened in the middle of the opening and closing wheel 7, and its left side wall is fixedly mounted on the frame 1 by screws; the opening and closing groove 71 is an annular groove, which can be divided into four sections, as shown below in combination. Figure 8The first section is used to drive the follower bearing 54 to move to the left. At this time, the L-shaped swing rod 53 drives the bottom mold 52 to rotate 90 degrees counterclockwise, and the bottom mold 52 moves from position C to position D to overlap with the welding head 441 (that is, the bottom mold 52 and the welding head 441 are switched from the open state to the closed state); the second section is used to keep the L-shaped swing rod 53 from rotating. At this time, the bottom mold 52 moves from position D to position F and remains in an overlapping state with the welding head 441 (that is, the bottom mold 52 and the welding head 441 remain in a closed state); the third section It is used to drive the follower bearing 54 to move to the right. At this time, the L-shaped swing rod 53 drives the bottom mold 52 to rotate 90 degrees clockwise. The bottom mold 52 moves from F to G and is separated from the welding head 441 by 90 degrees (that is, the bottom mold 52 and the welding head 441 are switched from the open state to the open state); the fourth section is used to keep the L-shaped swing rod 53 from rotating. At this time, the bottom mold 52 moves from G to C and remains separated from the welding head 441 by 90 degrees (that is, the bottom mold 52 and the welding head 441 remain in the open state). The width of the left and right sides of the opening and closing groove 71 ( Figure 6 The distance shown at W in the middle is used to control the rotation angle of the bottom mold, and the specific value can be adjusted as needed.

[0035] Furthermore, a rocker seat 55 is provided on the third mounting plate 51 for enhancing the stability of the L-shaped rocker 53; the L-shaped rocker 53 passes through the rocker seat 55 and is rotatably connected to the rocker seat 55; a limit seat 56 is provided at one end of the third mounting plate 51 away from the closing wheel 7 for assisting the bottom mold 52 to align the welding head 441.

[0036] like Figure 1 As shown, the swing rod seat 55 is mounted on the third mounting plate 51 by bolts, and the swing rod seat 55 is rotatably connected to the L-shaped swing rod 53 by bearings. The L-shaped swing rod 53 is mounted on the third mounting plate 51 and the swing rod seat 55 by at least two bearings, so as to obtain higher stability during the rotation process. The limit seat 56 is fixedly mounted on the other end of the third mounting plate 51 by screws, so that the bottom mold 52 can overlap with the welding head 441 after rotating 90 degrees, thereby ensuring the welding quality.

[0037] Furthermore, the eccentric bearing assembly 6 includes a bearing 61, an eccentric bearing seat 62 for fixing the bearing 61 on the frame 1, and a bearing sleeve 63 for driving the cylinder 45 to move; the inner ring of the bearing 61 is sleeved with the outer ring of the eccentric bearing seat 62, and the inner ring of the bearing sleeve 63 is sleeved with the outer ring of the bearing 61; the eccentric bearing seat 62 is fixedly connected to the frame 1, and the cylinder seat end of the cylinder 45 is hinged to the outer ring of the bearing sleeve 63.

[0038] like Figure 7-Figure 8As shown, the bearing 61 is a conventional bearing, generally including an inner ring, an outer ring and a plurality of balls between the inner ring and the outer ring. The right end of the eccentric bearing seat 62 is fixedly mounted on the frame 1 by means of screws or interference fit (i.e., the eccentric bearing seat 62 is fixed during the entire welding process), and a through hole is provided in the middle thereof for the shaft 2 to pass through, and there is a reasonable gap between the through hole and the outer wall of the shaft 2. The outer edge of the bearing sleeve 63 is integrally formed (or fixedly mounted by screws) with six hinge blocks 631, and the hinge blocks 631 are hinged to the cylinder seat end of the cylinder 45 through a pin shaft. Under the action of the bearing sleeve 63, the hinge block 631 is closest to the axis of the shaft 2 when it is at position B, at which time the welding head 441 is completely retracted under the third mounting plate 51, and the bottom mold 52 is in an open state; the hinge block 631 is farthest from the axis of the shaft 2 when it is at position E, at which time the welding head 441 is completely extended above the third mounting plate 51, and the bottom mold 52 is in a closed state.

[0039] Furthermore, a transmission wheel 21 is provided at the end of the rotating shaft 2 for transmitting with an external driving device to drive the rotating shaft 2 to rotate.

[0040] like Figure 1-3 As shown, the transmission wheel 21 is installed on the rotating shaft 2 by a conventional installation method of keying sleeve. The transmission wheel 21 is a pulley or a sprocket, which drives the rotating shaft 2 to rotate under the transmission of an external driving device, thereby driving the operation of the integrated welding device.

[0041] Furthermore, in order to prevent the air pipe or the cable from being entangled, a rotary joint 22 is fixedly installed at both ends of the rotating shaft 2 in a conventional manner. The rotary joint 22 can be selected as an air pipe rotary joint and / or a cable rotary joint as required.

[0042] The welding principle of the present invention is as follows: the workpiece 8 is pressed Figure 3 The ultrasonic welding assembly 4 and the bottom mold assembly 5 rotate counterclockwise with the turntable 3; when the turntable 3 rotates from B to D, the welding head 441 gradually extends out, and the bottom mold 52 gradually closes, and the two clamp the workpiece 8; then the turntable 3 rotates from D to F, and the welding head 441 cooperates with the bottom mold 52 to weld the workpiece 8; then the turntable 3 rotates from F to B, the welding head 441 gradually retracts, and the bottom mold 52 gradually opens; the welding process of one station is completed in three steps of closing-welding-opening.

[0043] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A multi-station ultrasonic welding device, characterized in that: The invention comprises a frame, a rotating shaft is rotatably arranged on the frame, a rotating disk is arranged on the rotating shaft, a plurality of ultrasonic welding components are slidingly arranged in an annular array at equal intervals on the rotating disk, and a plurality of bottom mold components corresponding to the ultrasonic welding components are arranged in an annular array at equal intervals on the rotating disk; an eccentric bearing component for driving the ultrasonic welding component to slide back and forth is arranged on the frame and located on one side of the rotating disk, and an opening and closing wheel for driving the bottom mold component to move and press against the ultrasonic welding component and then weld the workpiece is arranged on the frame and located on the other side of the rotating disk; the ultrasonic welding component is hinged to the eccentric bearing component, and the bottom mold component is transmission-connected to the opening and closing wheel.

2. The multi-station ultrasonic welding device according to claim 1, characterized in that: The ultrasonic welding assembly includes a first mounting plate, a second mounting plate, a linear slide assembly, an ultrasonic welding machine, and a cylinder; the fixed end of the linear slide assembly is fixedly connected to the first mounting plate, and the sliding end thereof is fixedly connected to the bottom surface of the second mounting plate; the front surface of the second mounting plate is fixedly connected to the ultrasonic welding machine; the protruding end of the cylinder is hinged to the second mounting plate, and the cylinder seat end of the cylinder is hinged to the eccentric bearing assembly; the sliding direction of the ultrasonic welding machine coincides with the radial direction of the turntable, and the ultrasonic welding machine is provided with a welding head for movably pressing against the workpiece; the first mounting plate is fixedly connected to the turntable.

3. The multi-station ultrasonic welding device according to claim 2, characterized in that: The bottom mold assembly includes a third mounting plate located at the outer edge of the turntable, a bottom mold used for movably pressing against the welding head to weld the workpiece, an L-shaped rocker arm used for driving the bottom mold to rotate, and a follower bearing used for driving the L-shaped rocker arm to rotate; the third mounting plate is fixedly connected to the turntable, and a welding head hole for the welding head to pass through is provided in the middle thereof; the L-shaped rocker arm is rotatably connected to one end of the third mounting plate close to the opening and closing wheel; one end of the L-shaped rocker arm away from the rotating shaft is fixedly connected to the bottom mold, and one end close to the rotating shaft is fixedly connected to the inner ring of the follower bearing; an opening and closing groove for accommodating the follower bearing and driving the follower bearing to reciprocate is provided on the outer wall of the opening and closing wheel, and the side wall of the opening and closing groove movably presses against the outer ring of the follower bearing.

4. The multi-station ultrasonic welding device according to claim 3, characterized in that: A rocker seat is arranged on the third mounting plate to enhance the stability of the L-shaped rocker; the L-shaped rocker passes through the rocker seat and is rotatably connected to the rocker seat; a limit seat is arranged on one end of the third mounting plate away from the combined wheel to assist the bottom mold in aligning the welding head.

5. The multi-station ultrasonic welding device according to claim 2, characterized in that: The eccentric bearing assembly includes a bearing, an eccentric bearing seat for fixing the bearing on a frame, and a bearing sleeve for driving the cylinder to move; the inner ring of the bearing is sleeved with the outer ring of the eccentric bearing seat, and the inner ring of the bearing sleeve is sleeved with the outer ring of the bearing; the eccentric bearing seat is fixedly connected to the frame, and the cylinder seat end of the cylinder is hinged to the outer ring of the bearing sleeve.

6. The multi-station ultrasonic welding device according to claim 5, characterized in that: The inner ring of the eccentric bearing seat is sleeved with a rotating shaft, and there is a gap between the inner ring and the outer wall of the rotating shaft.

7. The multi-station ultrasonic welding device according to claim 1, characterized in that: The end of the rotating shaft is provided with a transmission wheel for transmitting with an external driving device and thus driving the rotating shaft to rotate.

8. The multi-station ultrasonic welding device according to claim 1, characterized in that: A rotating joint is arranged at the end of the rotating shaft.

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