Welding device and filling machine

Abstract

The utility model relates to welding device and filling machine. Welding device includes drive part, transmission mechanism, welding head and anvil. Transmission mechanism includes first transmission subassembly, second transmission subassembly, third transmission subassembly and intermediate connecting piece. The power input end of first transmission subassembly is connected to drive part, and the power output end of first transmission subassembly is connected to intermediate connecting piece. The power input end of second transmission subassembly is connected to intermediate connecting piece, and the power output end of second transmission subassembly is connected to welding head. The power input end of third transmission subassembly is connected to intermediate connecting piece, and the power output end of third transmission subassembly is connected to anvil. When drive part drives transmission mechanism positively, welding head moves along straight line towards anvil, and anvil moves towards welding head synchronously. When drive part drives transmission mechanism reversely, welding head moves along straight line away from anvil, and anvil moves away from welding head synchronously. Thus, it is realized that welding and reset operation are simple and reliable.

Description

Technical Field

[0001] This utility model relates to a welding device and a filling machine including the welding device. Background Technology

[0002] Filling machines typically include a welding device for sealing a portion of packaging material before or after filling. The welding device may include a welding head and an anvil. During welding, the welding head and anvil clamp the portion of packaging material to be sealed, and the welding head applies energy to this portion, melting the adhesive material and thus sealing the area. After welding, the welding head and anvil release the packaging material, and the welded packaging material is conveyed to the next station.

[0003] A simple and reliable transmission mechanism needs to be set between the drive component of the welding device and the welding head and anvil to efficiently, accurately, energy-savingly and smoothly execute the relative movement of the welding head and anvil towards and away from each other. Utility Model Content

[0004] One objective of this invention is to provide a simple and reliable welding device. Another objective is to reduce the driving load on the welding device. A further objective is to improve the smoothness of operation of the welding device, avoiding unwanted component jamming or movement during operation.

[0005] One aspect of this utility model provides a welding apparatus, which includes a driving member, a transmission mechanism, a welding head, and an anvil. The transmission mechanism includes a first transmission component, a second transmission component, a third transmission component, and an intermediate connecting component. The transmission mechanism is configured such that: the power input end of the first transmission component is connected to the driving member, and the power output end of the first transmission component is connected to the intermediate connecting component; the power input end of the second transmission component is connected to the intermediate connecting component, and the power output end of the second transmission component is connected to the welding head; the power input end of the third transmission component is connected to the intermediate connecting component, and the power output end of the third transmission component is connected to the anvil; when the driving member drives the transmission mechanism in a forward direction, the welding head moves toward the anvil in a straight line, and the anvil moves synchronously toward the welding head; when the driving member drives the transmission mechanism in a reverse direction, the welding head moves away from the anvil in a straight line, and the anvil moves synchronously away from the welding head.

[0006] In some embodiments, the second transmission assembly includes a first link, a second link, and a rotary connecting assembly. The first link connects the intermediate connector and the rotary connecting assembly to drive the rotary connecting assembly to oscillate about its rotation axis. The second link connects the rotary connecting assembly and the welding head, such that the oscillating motion of the rotary connecting assembly drives the welding head to perform linear reciprocating motion.

[0007] In some embodiments, the intermediate connector includes a rocker arm, which is coaxially arranged with the power input end of the third transmission assembly, such that the first transmission assembly drives the rocker arm, the third transmission assembly, and the anvil to pivot together about a common pivot point, and the connection between the second transmission assembly and the rocker arm is spaced apart from the common pivot point.

[0008] In some implementations, the rotary connection assembly is rotatably connected to the housing of the welding apparatus.

[0009] In some embodiments, the rotary connection assembly includes a connecting plate and a rotary shaft that pivot integrally about a rotation axis, a first link connected to the connecting plate, and a second link connected to the rotary shaft.

[0010] In some embodiments, the housing of the welding apparatus includes wall plates located on both sides of the welding apparatus, and the two ends of the rotating shaft are supported by the wall plates.

[0011] In some embodiments, the welding apparatus further includes a guide rail for guiding the welding head in linear reciprocating motion.

[0012] In some embodiments, the second transmission assembly includes a first link, a second link, and a slider. The first link connects the intermediate connector and the slider to drive the slider to perform linear reciprocating motion along the guide rail. The second link connects the slider and the welding head, such that the linear reciprocating motion of the slider drives the welding head to perform linear reciprocating motion.

[0013] In some implementations, the second link is connected to the welding head via a cylinder assembly.

[0014] In some implementations, the second connecting rod is connected to the cylinder head of the cylinder assembly via a spherical connector.

[0015] Another aspect of this invention provides a filling machine that includes a welding apparatus according to the above aspects.

[0016] The welding device according to this invention employs a common intermediate connector to simultaneously drive both the welding head and the anvil, enabling them to move synchronously closer or further apart, thus achieving a simple and reliable force and motion transmission path. Specifically, this invention preferably drives the welding head in linear reciprocating motion through the swinging motion of the rotating connecting assembly. Since the weight of the rotating connecting assembly can be supported by the housing of the welding device, the load on the driving component is reduced. Furthermore, the rotational motion path of the rotating connecting assembly does not require additional guiding mechanisms, avoiding interference with the guide rails that constrain the linear reciprocating motion of the welding head, thus preventing component jamming or misalignment and ensuring efficient and smooth operation of the welding device. Attached Figure Description

[0017] The embodiments of the present invention will be described below by way of example only with reference to the accompanying drawings. In the drawings, the same features or parts are indicated by the same reference numerals, and the drawings are not necessarily drawn to scale. In the drawings:

[0018] Figure 1 A perspective view of a welding apparatus according to a first embodiment of the present invention is shown, wherein the welding apparatus is in a standby position;

[0019] Figure 2 A perspective view of the transmission mechanism of a welding apparatus according to a first embodiment of the present invention is shown, wherein the welding apparatus is in a standby position;

[0020] Figure 3 A side view of the transmission mechanism of a welding apparatus according to a first embodiment of the present invention is shown, wherein the welding apparatus is in a standby position;

[0021] Figure 4 A side view of the transmission mechanism of a welding apparatus according to a first embodiment of the present invention is shown, wherein the welding apparatus is in the welding position.

[0022] Figure 5 A side view of a welding apparatus according to a second embodiment of the present invention is shown. Detailed Implementation

[0023] The following description is exemplary in nature and is not intended to limit the invention, its application, or its uses. It should be understood that in all these figures, similar reference numerals indicate the same or similar parts and features. The figures only schematically illustrate the concept and principles of embodiments of the invention and do not necessarily show the specific dimensions and scale of each embodiment. Certain parts of specific figures may be depicted in an exaggerated manner to illustrate relevant details or structures of embodiments of the invention.

[0024] In the description of the embodiments of this utility model, the directional terms related to "upper" and "lower" are used to describe the upper and lower positions of the views shown in the accompanying drawings. In practical applications, the positional relationships of "upper" and "lower" used herein can be defined according to the actual situation, and these relationships can be reversed.

[0025] Firstly, according to Figures 1 to 4 The welding apparatus 1 according to the first embodiment of the present invention is described. Figure 1 A perspective view of the welding device 1 in the standby position is shown; Figure 2 and Figure 3 A perspective view and a side view of the transmission mechanism of the welding device 1 in the standby position are shown respectively; Figure 4A side view of the transmission mechanism of the welding apparatus 1 in the welding position is shown. Figures 2 to 4 For clarity, a portion of the housing of the welding device 1 and parts unrelated to the key points of this utility model have been omitted.

[0026] like Figures 1 to 4 As shown, the welding apparatus 1 includes a drive unit 10, a transmission mechanism 20, a welding head 30, and an anvil 40. The drive unit 10 can be configured as a rotary motor. The welding apparatus 1 also includes a fixed housing 50, specifically including wall panels 510 positioned on both sides of the welding apparatus 1. Each side of the welding apparatus 1 can be provided with multiple wall panels 510 connected in a detachable manner (e.g., by fasteners) to form a maintenance window that allows an operator to remove a portion of the wall panel 510 to access the internal components of the welding apparatus 1. The drive unit 10 is mounted on one of the wall panels 510. The transmission mechanism 20 transmits power from the drive unit 10 to the welding head 30 and to the anvil 40, causing the welding head 30 and the anvil 40 to move between a standby position and a welding position. The transmission mechanisms 20 can be symmetrically arranged on both sides of the welding apparatus 1, and both transmission mechanisms 20 on both sides of the welding apparatus 1 are synchronously driven by one drive unit 10. Alternatively, a drive member 10 can be arranged on each side of the welding device 1 to drive the transmission mechanisms 20 on both sides of the welding device 1 respectively. The following description only takes the transmission mechanism 20 located on one side of the welding device 1 as an example.

[0027] like Figures 1 to 3 As shown, in the standby position, the welding head 30 and the anvil 40 are spaced a certain distance apart. Figure 4 As shown, in the welding position, the welding head 30 and the anvil 40 are close to or abutting each other. The welding device 1 can be applied to a filling machine. Specifically, when the welding head 30 and the anvil 40 are in the standby position, the packaging material to be sealed (e.g., a cardboard box) in the filling machine is conveyed to the welding station by a conveyor belt, so that the part of the packaging material to be sealed (e.g., the edge of the top opening of the cardboard box) is positioned between the welding head 30 and the anvil 40. Subsequently, the drive member 10 drives the welding head 30 and the anvil 40 to move synchronously closer to each other to the welding position via the transmission mechanism 20, so that the part of the packaging material to be sealed is clamped by the welding head 30 and the anvil 40. In the welding position, the welding head 30 applies energy to the part of the packaging material to be sealed, causing the adhesive material of the part to be sealed to melt, thereby sealing the part to be sealed. After the welding head 30 and the anvil 40 remain in the welding position for a predetermined time, the drive unit 10 drives the welding head 30 and the anvil 40 to move synchronously away from each other and return to the standby position via the transmission mechanism 20. At the same time, the sealed packaging material is conveyed to the next station by the conveyor belt, and another unsealed packaging material is conveyed to the welding station. The welding head 30 can be configured as an ultrasonic welding head, for example.

[0028] like Figures 1 to 4 As shown, the transmission mechanism 20 includes a first transmission assembly 210, a second transmission assembly 220, a third transmission assembly 230, and an intermediate connecting member 240. The power input end 211 of the first transmission assembly 210 is connected to the output shaft 110 of the drive member 10, and the power output end 212 of the first transmission assembly 210 is connected to the intermediate connecting member 240. The power input end 221 of the second transmission assembly 220 is connected to the intermediate connecting member 240, and the power output end 222 of the second transmission assembly 220 is connected to the welding head 30. The power input end 231 of the third transmission assembly 230 is connected to the intermediate connecting member 240, and the power output end 232 of the third transmission assembly 230 is connected to the anvil 40. Thus, part of the power input from the driving component 10 to the first transmission assembly 210 is transmitted to the welding head 30 via the intermediate connector 240 and the second transmission assembly 220 to drive the welding head 30 to move, while another part is transmitted to the anvil 40 via the intermediate connector 240 and the third transmission assembly 230 to drive the anvil 40 to move, so that the intermediate connector 240 acts as a common medium to drive the welding head 30 and the anvil 40 to move synchronously. Figure 1 and Figure 2 As shown, the intermediate connector 240 is constructed as a rocker arm, which is rotatably connected to the wall panel 510 at its pivot point P1, so that the rocker arm can pivot about the pivot point P1.

[0029] The first transmission assembly 210 includes a series of interconnected links. One end of each link defines a power input end 211 of the first transmission assembly 210 and is connected to the output shaft 110 of the drive member 10. The other end defines a power output end 212 of the first transmission assembly 210 and is connected to one end of an intermediate connector 240 configured as a rocker arm. The connection between the first transmission assembly 210 and the intermediate connector 240 is spaced apart from the pivot point P1. Therefore, the first transmission assembly 210 can push or pull one end of the intermediate connector 240, causing the intermediate connector 240 to pivot about the pivot point P1.

[0030] The second transmission assembly 220 includes a first link 223, a second link 224, and a rotary connection assembly 225. The rotary connection assembly 225 is rotatably connected to the housing 50 (specifically, to the wall panel 510), allowing it to rotate about its rotation axis P2. The first link 223 connects the intermediate connector 240 and the rotary connection assembly 225, thereby driving the rotary connection assembly 225 to oscillate about its rotation axis P2 via the first link 223, as the pivoting motion of the intermediate connector 240 about the pivot point P1 drives the rotary connection assembly 225 to oscillate about its rotation axis P2. The second link 224 connects the rotary connection assembly 225 and the welding head 30, causing the oscillating motion of the rotary connection assembly 225 about its rotation axis P2 to drive the welding head 30 to move closer to or away from the anvil 40. Specifically, in this embodiment, the oscillating motion of the connection assembly 225 about its rotation axis P2 is converted into a linear reciprocating motion of the welding head 30 moving closer to or away from the anvil 40. The rotary connection assembly 225 includes a connecting plate 226 and a rotating shaft 227 that are integrally pivotable about a rotation axis P2, the rotating shaft 227 extending along the rotation axis P2. One end of a first connecting rod 223 connects to an intermediate connecting member 240, and the other end connects to the edge of the connecting plate 226, with the connection portion of the first connecting rod 223 to the intermediate connecting member 240 spaced apart from the pivot point P1. One end of a second connecting rod 224 connects to the rotating shaft 227, and the other end connects to a welding head 30. Figure 2 As best shown, one end of the second link 224 is hinged between a pair of lugs 228 protruding from the rotation shaft 227. Multiple second links 224 can be spaced apart along the axial direction of the rotation shaft 227, thereby simultaneously driving multiple welding heads 30 to move together via the rotation shaft 227. Preferably, the second link 224 is connected to the welding head 30 via a cylinder assembly 60, thereby increasing the force on the welding head 30, quickly pushing the welding head 30 to the welding position and returning it to the standby position. Preferably, the second link 224 can be connected to the cylinder cam 610 of the cylinder assembly 60 via a fisheye connector 70. The welding apparatus 1 also includes a guide assembly 80 for guiding the welding head 30 in linear reciprocating motion. The guide assembly 80 includes a body 810 fixed to the housing 50 (e.g., a beam fixed to the housing 50), the body being provided with a guide rod 820 serving as a guide rail. The guide assembly 80 also includes a slider 830 that is fitted onto the guide rod 820 and can slide along the guide rod 820. The slider 830 is connected to the cylinder assembly 60 and guides the cylinder assembly 830 to slide integrally along the guide rod 820. Under the constraint of the guide assembly 80, the second link 224 drives the welding head 30 to perform linear reciprocating motion in a direction parallel to the guide rod 820 via the cylinder assembly 60. The connection of the second link 224 to the cylinder assembly 60 via the fisheye joint 70 helps to compensate for installation errors and prevents jamming or misalignment of the second link 224, the cylinder assembly 60, and the guide assembly 80 during relative movement.

[0031] like Figure 1 and Figure 2 As shown, the third transmission assembly 230 includes an anvil support shaft 233. Both ends of the anvil support shaft 233 are rotatably supported on the wall panels 510 on both sides of the welding device 1, allowing the anvil support shaft 233 to rotate about its axis. The anvil support shaft 233 is rigidly connected to the intermediate connector 240, and the end of the anvil support shaft 233 connected to the intermediate connector 240 defines the power input end 231 of the third transmission assembly 230. The anvil support shaft 233 and the intermediate connector 240 are arranged coaxially, that is, the axis of the anvil support shaft 233 coincides with the pivot axis of the intermediate connector 240, thereby the anvil support shaft 233 and the intermediate connector 240 pivot integrally about the pivot point P1. The third transmission assembly 230 also includes a plurality of hook-shaped members 234 spaced apart along the axis of the anvil support shaft 233 on the outer peripheral surface of the anvil support shaft 233. These hooks 234 can be integrally formed with the anvil support shaft 233 or attached to the anvil support shaft 233 by any suitable means such as welding, bonding, or fastening, so that the hooks 234 rotate together with the anvil support shaft 233 about the axis of the anvil support shaft 233. The anvil 40 has an elongated shape extending parallel to the axis of the anvil support shaft 233, and the elongated anvil 40 is attached to the free end of each hook 234, the free end of which defines the power output end 232 of the third transmission assembly 230. As described above, the welding device 1 may include a plurality of welding heads 30 driven by a rotating shaft 227, which may be arranged side by side along the length of the anvil 40 (only one welding head 30 is shown in the figure). Specifically, one or more welding heads 30 may be arranged between every two adjacent hooks 234. All welding heads 30 of the welding device 1 can move synchronously toward and away from the anvil 40 under the drive of the drive member 10, thereby welding multiple packaging materials at the same time.

[0032] like Figure 3As shown, when the output shaft 110 of the drive component 10 rotates in the direction indicated by arrow A and drives the power input end 211 of the first transmission assembly 210 to rotate, a series of connecting rods of the first transmission assembly 210 push the end of the intermediate connector 240, causing the intermediate connector 240 to pivot about the pivot point P1 in the direction indicated by arrow B. The intermediate connector 240 then pulls the connecting plate 226 of the rotating connection assembly 225 to rotate about the rotation axis P2 in the direction indicated by arrow C through the first connecting rod 223 of the second transmission assembly 220. The rotation shaft 227 of the rotating connection assembly 225 rotates together with the connecting plate 226 about the rotation axis P2. The rotation shaft 227 drives the second connecting rod 224 of the second transmission assembly 220 to push the cylinder cam 610 of the cylinder assembly 60, thereby pushing the welding head 30 connected to the cylinder cam 610 to move linearly towards the anvil 40 in the direction indicated by arrow D. The guide rod 820 of the guide assembly 80 guides the direction of the linear movement of the welding head 30. As the welding head 30 moves linearly towards the anvil 40, the intermediate connector 240 also drives the anvil support shaft 233 and hook-shaped member 234 of the third transmission assembly 230 to pivot together around the pivot point P1 in the direction shown by arrow B, thereby driving the anvil 40 to pivot around the pivot point P1 towards the welding head 30. Thus, the welding head 30 and the anvil 40 move synchronously to... Figure 4 The welding position is shown.

[0033] From the welding head 30 and the anvil 40 Figure 4 The welding position shown is returned to Figure 3 In the standby position shown, the output shaft 110 of the drive unit 10 is along the line with... Figure 3 Rotating in the opposite direction to arrow A, the first transmission assembly 210 pulls the end of the intermediate connector 240, causing the intermediate connector 240 to pivot around pivot point P1 in the opposite direction to arrow B. The intermediate connector 240 drives the rotary connecting assembly 225 of the second transmission assembly 220 to rotate in the opposite direction to arrow C, thereby driving the welding head 30 to move linearly away from the anvil 40 in the opposite direction to arrow D. Simultaneously, it drives the third transmission assembly 230 and the anvil 40 to pivot together around pivot point P1 in the opposite direction to arrow B, so that the welding head 30 and the anvil 40 move synchronously to the standby position.

[0034] Figure 5A side view of a welding apparatus 1' according to a second embodiment of the present invention is shown. Components in the second embodiment that are the same as or similar to those in the first embodiment are indicated by the same reference numerals with apostrophes, and the following description will focus only on the differences between the second and first embodiments. The welding apparatus 1' includes a slider 225', replacing the rotary connecting assembly 225 of the welding apparatus 1 in the first embodiment. The slider 225' is arranged within and slidable along a guide rail 229'. A first link 223' of a second transmission assembly 220' is connected between an intermediate connecting member 240' and the slider 225' to drive the slider 225' to perform linear reciprocating motion along the guide rail 229'. A second link 224' of the second transmission assembly 220' is connected between the slider 225' and the welding head 30', such that the linear reciprocating motion of the slider 225' drives the welding head 30' to perform linear reciprocating motion. Other aspects of the second embodiment may be the same as or similar to those of the first embodiment.

[0035] In the welding apparatus of this invention, the driving member 10 jointly drives the welding head 30 and the anvil 40 to move synchronously closer to or further away from each other. To achieve this, the power transmission path between the driving member 10 and the welding head 30 and the power transmission path between the driving member 10 and the anvil 40 are shared, so that the power of the driving member 10 is transmitted to the welding head 30 and the anvil 40 respectively via a common intermediate connector 240, thereby realizing a simple and reliable power transmission configuration.

[0036] In particular, the first embodiment represents a further improvement over the second embodiment described above. Compared to the second embodiment, where the sliding member 225' may require a portion of its weight to be supported by the second connecting rod 224' (and optionally a cylinder assembly), the weight of the rotary connecting assembly 225 in the first embodiment is entirely supported by the housing 50 of the welding device 1, thus reducing the load on the drive member 10. Furthermore, in the first embodiment, the rotary connecting assembly 225 rotates about its axis, and its trajectory does not require additional guiding mechanisms (such as the guide rail 229' that guides the movement of the sliding member 225' in the second embodiment). This avoids the additional guiding mechanism from being out of parallel with the guide assembly 80 of the welding head 30 due to machining and installation errors, which could lead to component jamming or movement, ensuring efficient and smooth operation of the welding device.

[0037] This invention may also include variations of the above embodiments. For example, in the above embodiments, the intermediate connector 240 is constructed as a rocker arm, but this invention is not limited to this. In other embodiments, the intermediate connector 240 may be constructed as any other suitable configuration, such as a turntable, cam, eccentric wheel, or connecting rod, as long as it can serve as an intermediate medium to synchronously drive both the welding head 30 and the anvil 40. As another example, in the above embodiments, the rotating shaft 227 can be used to drive multiple welding heads 30 to move together simultaneously. However, for welding devices that include only a single welding head 30, the rotating shaft 227 can be omitted, and only the connecting plate 226 can drive the movement of the single welding head 30. Correspondingly, the anvil support shaft 233 may also be shortened or constructed in other forms, for example, replaced by a clamping member rigidly connected to the intermediate connector 240 for clamping the anvil.

[0038] Exemplary embodiments of the welding apparatus and filling machine according to the present invention have been described in detail herein. However, it should be understood that the present invention is not limited to the specific embodiments described and shown above. Various modifications and variations can be made to the present invention by those skilled in the art without departing from its spirit and scope. All such modifications and variations fall within the scope of the present invention. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. A welding apparatus, comprising a drive component, a transmission mechanism, a welding head, and an anvil, characterized in that: The transmission mechanism includes a first transmission component, a second transmission component, a third transmission component, and an intermediate connecting member. The transmission mechanism is configured such that: The power input end of the first transmission component is connected to the drive component, and the power output end of the first transmission component is connected to the intermediate connector. The power input end of the second transmission component is connected to the intermediate connector, and the power output end of the second transmission component is connected to the welding head; The power input end of the third transmission component is connected to the intermediate connector, and the power output end of the third transmission component is connected to the anvil. When the driving component drives the transmission mechanism in the forward direction, the welding head moves in a straight line toward the anvil, and the anvil moves synchronously toward the welding head; When the driving component reverses the transmission mechanism, the welding head moves away from the anvil in a straight line, and the anvil moves away from the welding head synchronously.

2. The welding apparatus according to claim 1, characterized in that: The second transmission assembly includes a first connecting rod, a second connecting rod, and a rotary connection assembly. The first link connects the intermediate connector and the rotary connection assembly to drive the rotary connection assembly to swing about its rotation axis. The second link connects the rotary connecting assembly and the welding head, so that the oscillating motion of the rotary connecting assembly drives the welding head to perform linear reciprocating motion.

3. The welding apparatus according to claim 2, characterized in that: The intermediate connecting member includes a rocker arm, which is coaxially arranged with the power input end of the third transmission assembly, such that the first transmission assembly drives the rocker arm, the third transmission assembly, and the anvil to pivot integrally around a common pivot point. The connection between the second transmission component and the rocker arm is spaced apart from the common pivot point.

4. The welding apparatus according to claim 2 or 3, characterized in that: The rotary connection assembly is rotatably connected to the housing of the welding device.

5. The welding apparatus according to claim 4, characterized in that: The rotary connection assembly includes a connecting plate and a rotary shaft that pivot integrally about the rotation axis, with a first connecting rod connected to the connecting plate and a second connecting rod connected to the rotary shaft.

6. The welding apparatus according to claim 5, characterized in that: The housing of the welding device includes wall panels located on both sides of the welding device, and the two ends of the rotating shaft are supported by the wall panels.

7. The welding apparatus according to any one of claims 1 to 3, characterized in that: The welding device also includes a guide rail for guiding the welding head to perform linear reciprocating motion.

8. The welding apparatus according to claim 1, characterized in that: The second transmission assembly includes a first connecting rod, a second connecting rod, and a sliding member. The first connecting rod connects the intermediate connecting member and the sliding member to drive the sliding member to perform linear reciprocating motion along the guide rail. The second link connects the slider and the welding head, so that the linear reciprocating motion of the slider drives the welding head to perform linear reciprocating motion.

9. The welding apparatus according to claim 2 or 8, characterized in that: The second connecting rod is connected to the welding head via a cylinder assembly.

10. The welding apparatus according to claim 9, characterized in that: The second connecting rod is connected to the cylinder cam of the cylinder assembly via a fisheye connector.

11. A filling machine, characterized in that, The filling machine includes a welding apparatus according to any one of claims 1 to 10.

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