Electrode mechanism and seam welder

Abstract

The present invention relates to an electrode mechanism and a seam welder. The electrode mechanism includes a support assembly and multiple groups of electrode unit groups; the multiple groups of electrode unit groups are movably mounted on the support assembly, and each group of electrode unit groups includes two electrode units symmetrically distributed along the radial direction of the support assembly; at least one group of electrode unit groups can move along the axial direction of the support assembly, and the multiple groups of electrode unit groups can be arranged in a staggered manner in the axial direction of the support assembly, so that each electrode unit can approach or move away from the support assembly to change the size of the multiple groups of electrode unit groups in the radial direction of the support assembly. When the multiple groups of electrode unit groups are arranged in a staggered manner in the axial direction of the support assembly, their radial size is much smaller than the radial size when the multiple groups of electrode unit groups are located at the same position in the axial direction of the support assembly, which facilitates the electrode mechanism to pass through the central circular holes of the end plate, the head plate and the tail plate and enter the inside of the circular cage rib, and further enables the electrode unit to perform seam welding operations inside the circular cage rib.

Description

Technical Field

[0001] The present invention relates to the field of welding, and particularly to an electrode mechanism and a seam welder. Background Art

[0002] A seam welder is an important machine for forming the steel bar skeletons of cement products (such as drain pipes, pipe piles for high-rise buildings, and some chemical products). Because of its reliable welding and high efficiency for circular cage bars, it is widely used in the cement products and construction fields. The electrode mechanism of a seam welder is an essential part of the seam welder, and is used for welding the longitudinal steel bars distributed in the circumferential direction of the end plate and the circumferential steel bars introduced through the guide bar mechanism together.

[0003] The existing electrode mechanisms of seam welders are mostly disc electrode mechanisms. The disc electrode is a whole conductive electrode with a circular outer shape. Before seam welding, each longitudinal steel bar with upset heads at both ends passes through the bar-passing disc in sequence and is attached to the outer surface of the disc electrode for welding. However, for end plates with different hole diameters, the existing disc electrodes have relatively large radial dimensions and have difficulties in passing through the end plate and the central holes of the head plate and the tail plate, so that the disc electrodes cannot weld on the inner circumference of the circular cage bars. Therefore, the existing disc electrodes can only be applied to the process of seam welding on the outer circumferential surface of the circular cage bars and cannot be applied to other pipe pile cage bar processes. Summary of the Invention

[0004] Based on this, in view of the problem that the existing disc electrodes have a relatively large diameter and cannot pass through the central holes of the end plate, the head plate, and the tail plate of the welding equipment, thus unable to weld on the inner circumference of the cage bars, it is necessary to provide an electrode mechanism with an adjustable outer diameter of the electrode unit and a seam welder having the electrode mechanism.

[0005] According to one aspect of the present application, there is provided an electrode mechanism, including:

[0006] a support assembly; and

[0007] a plurality of groups of electrode unit groups, movably installed on the support assembly, each group of electrode unit groups including two electrode units symmetrically arranged in the radial direction of the support assembly, and all the electrode units are arranged in sequence around the circumference of the support assembly;

[0008] at least one group of the electrode unit groups can be controlled to move in the axial direction of the support assembly, so that at least two groups of the electrode unit groups are arranged in a staggered manner in the axial direction of the support assembly; each electrode unit can be controlled to approach or move away from the support assembly to change the size of the electrode unit group in the radial direction of the support assembly.

[0009] In one embodiment, when multiple groups of the electrode unit groups are located at the same position in the axial direction of the support assembly, the multiple groups of electrode unit groups have a first radial dimension; when at least two groups of the electrode unit groups are arranged in a staggered manner in the axial direction of the support assembly, the multiple groups of electrode unit groups have a second radial dimension;

[0010] The first radial dimension is greater than the second radial dimension.

[0011] In one embodiment, the support assembly includes a support rod and a rotating shaft. The support rod is provided with a central through hole extending along its own length direction. The rotating shaft is received in the central through hole and is coaxially arranged with the support rod. A travel groove extending spirally along the axial direction of the rotating shaft is provided on the outer peripheral surface of the rotating shaft;

[0012] At least one group of the electrode unit groups is engaged with the travel groove. The rotating shaft can rotate relative to the support rod with the central axis of the support rod as the rotation axis to drive the electrode unit group to move in the axial direction of the support assembly.

[0013] In one embodiment, a first travel groove and a second travel groove extending spirally along the axial direction of the rotating shaft are provided on the outer peripheral surface of the rotating shaft. The spiral pitch of the first travel groove is greater than that of the second travel groove. One group of the electrode unit groups is engaged with the first travel groove, and another group of the electrode unit groups is engaged with the second travel groove;

[0014] When the rotating shaft rotates relative to the support rod, the moving distance of the electrode unit group engaged with the first travel groove in the axial direction of the rotating shaft is greater than the moving distance of the electrode unit group engaged with the second travel groove in the axial direction of the rotating shaft.

[0015] In one embodiment, the electrode mechanism further includes a sliding assembly. One end of the sliding assembly is limited in the travel groove, and the other end of the sliding assembly extends out of the support rod to connect the electrode unit. The sliding assembly moves in the axial direction of the support rod under the drive of the rotating shaft.

[0016] In one embodiment, the support rod is provided with a plurality of notches along the circumferential direction. The length direction of the notches is parallel to the axial direction of the support rod. The notches communicate with the central through hole of the support rod. The sliding assembly can pass through the notches to be connected with the rotating shaft.

[0017] In one embodiment, the electrode unit can be controllably rotated around an axis perpendicular to the axial direction of the support assembly while approaching or moving away from the support assembly in the radial direction of the support assembly.

[0018] In one embodiment, the electrode unit includes:

[0019] A connecting rod assembly, which is connected to the support assembly;

[0020] An electrode, which is mounted on the connecting rod assembly; and

[0021] A driving assembly, which is movably connected to the connecting rod assembly;

[0022] Under the drive of the driving assembly, the connecting rod assembly drives the electrode to rotate around a direction perpendicular to the axial direction of the support assembly, and at the same time approaches or moves away from the support assembly in the radial direction of the support assembly.

[0023] In one embodiment, when multiple groups of the electrode units are located at the same position in the axial direction of the support assembly, all the electrodes are jointly spliced into a ring-shaped electrode.

[0024] According to another aspect of the present application, there is provided a seam welder, including the above-mentioned electrode mechanism.

[0025] In the above-mentioned electrode mechanism, by arranging multiple groups of electrode units to be circumferentially mounted on the support assembly, the multiple electrode units are movably connected to the electrode mechanism, at least one group of electrode units can move along the axial direction of the support assembly, and each group of electrode units is provided with two electrodes symmetrically distributed along the radial direction of the support rod. The multiple groups of electrode units can be arranged in a staggered manner in the axial direction of the support assembly, so that each electrode unit can approach or move away from the support assembly to change the size of the multiple groups of electrode units in the radial direction of the support assembly. When the multiple groups of electrode units are arranged in a staggered manner in the axial direction of the support assembly, their radial size is much smaller than the radial size when the multiple groups of electrode units are located at the same position in the axial direction of the support assembly, thus facilitating the electrode mechanism to pass through the central circular holes of the end plate, the head plate and the tail plate and enter the interior of the circular cage reinforcement. When the multiple groups of electrode units are located at the same position in the axial direction of the support assembly, the multiple electrodes are spliced into a complete ring-shaped electrode, enabling the ring-shaped electrode to perform seam welding operations on the circular cage reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 A three-dimensional schematic diagram of the electrode mechanism provided for the embodiment of the present invention;

[0028] Figure 2 Stereoscopic schematic diagram of the electrode unit of the electrode mechanism provided by the embodiment of the present invention in the released state;

[0029] Figure 3 Left view of the electrode unit of the electrode mechanism provided by the embodiment of the present invention in the released state;

[0030] Figure 4 Stereoscopic schematic diagram of the electrode unit of the electrode mechanism provided by the embodiment of the present invention in the contracted state;

[0031] Figure 5 Left view of the electrode unit of the electrode mechanism provided by the embodiment of the present invention in the contracted state;

[0032] Figure 6 Stereoscopic schematic diagram of the internal structure of the electrode mechanism provided by the embodiment of the present invention;

[0033] Figure 7 For Figure 1 Enlarged view of area A in Detailed implementation manners

[0034] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following describes the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly specified or defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified or defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0040] Combined with Figure 1 As shown, an embodiment of the present invention provides a welding device (not shown in the figure), and the welding device includes an electrode mechanism 10, and the electrode mechanism 10 is used to provide an electrode for cage bar roll welding and at the same time provide stable support for another electrode.

[0041] Taking the welding device as a rolling welder as an example below, the structure of the electrode mechanism 10 in the present application will be described. This embodiment is only used as an example for illustration and will not limit the technical scope of the present application. It can be understood that in other embodiments, the welding device may also be specifically other devices equipped with the electrode mechanism 10 of the present application, which is not limited herein.

[0042] As Figures 2 to 5The electrode mechanism 10 shown includes a support assembly 100 and multiple groups of electrode unit groups 300. One end of the support assembly 100 is a welding end, and the other end is connected to the motor of the electrode mechanism 10. The support assembly 100 can be driven by the motor to rotate around its own axial direction. The multiple groups of electrode unit groups 300 are movably installed on the welding end of the support assembly 100 along the circumferential direction of the support assembly 100. Each group of electrode unit groups 300 includes two electrode units 310 symmetrically distributed along the radial direction of the support assembly 100, which are used to provide electrodes 311 for seam welding operations. Two of the groups of electrode unit groups 300 can be controlled to move along the axial direction of the support assembly 100, so that the two groups of electrode unit groups 300 are arranged in a staggered manner in the axial direction of the support assembly 100, and each electrode unit 310 can be controlled to approach or move away from the support assembly 100, so that the multiple groups of electrode unit groups 300 can be in a contracted or released state, and further change the size of the multiple groups of electrode unit groups 300 in the radial direction of the support assembly 100.

[0043] When all the electrode units 310 are in the released state at the same time, the multiple groups of electrode unit groups 300 are located at the same position in the axial direction of the support assembly 100, and all the electrode units 310 are spliced into an annular electrode. At this time, the multiple groups of electrode unit groups 300 have a first radial dimension, and this annular electrode can perform seam welding operations on the circular cage bars. When all the electrode units 310 are in the contracted state at the same time, the multiple groups of electrode unit groups 300 are arranged in a staggered manner in the axial direction of the support assembly 100, and the multiple groups of electrode unit groups 300 have a second radial dimension. The first radial dimension is much larger than the second radial dimension. At this time, the electrode mechanism 10 can conveniently pass through the central circular holes of the end plate, the head plate and the tail plate of the seam welder and enter the inside of the circular cage bars, so that the circular cage bars are coaxially sleeved on the outer periphery of the support assembly 100 of the electrode mechanism 10.

[0044] In some embodiments, the support assembly 100 is located at the axis position of the electrode mechanism 10 of the seam welder and extends along the axial direction of the electrode mechanism 10, and is used for the installation and support of each group of electrode unit groups 300. One end of the support assembly 100 is used to connect the electrode unit 310, and the other end is used to connect an external motor.

[0045] The support assembly 100 includes a support rod 110, a rotating shaft 130 and multiple groups of sliding assemblies 120. The multiple groups of electrode unit groups 300 are movably installed on the support rod 110 through the sliding assemblies 120, and the rotating shaft 130 can rotate coaxially relative to the support rod 110.

[0046] Among them, the support rod 110 is preferably a hollow rod-shaped structure. The support rod 110 has a central through hole along its length direction to accommodate the rotating shaft 130. The cross-section of the support rod 110 is preferably a regular hexagon. Therefore, the outer peripheral surface of the support rod 110 has six faces, and each face is provided with a notch (not shown in the figure) communicating with the central through hole. The length direction of the notch is parallel to the axial direction of the support rod 110. Therefore, the sliding assembly 120 can be engaged with the rotating shaft 130 through the notch.

[0047] In some embodiments, the support rod 110 further has a plurality of mounting posts 111 for mounting the entire electrode mechanism 10 on the central column of the seam welder. Specifically, the mounting posts 111 are preferably four, and are arranged at one end of the support rod 110 away from the electrode unit 310. Each mounting post 111 extends in the radial direction of the support rod 110, and two of the mounting posts 111 are symmetrically arranged with respect to the other two mounting posts 111 in the radial direction of the support rod 110.

[0048] The rotating shaft 130 is in a rod-shaped structure, is received in the central through hole of the support rod 110, and is coaxial with the support rod 110. The opposite ends in the axial direction of the rotating shaft 130 are respectively engaged with the support rod 110 through a bearing 140. One end of the rotating shaft 130 is connected to an external motor, and the rotating shaft 130 can rotate relative to the support rod 110 under the drive of the external motor.

[0049] Furthermore, as Figure 6 shown, the rotating shaft 130 is preferably a cylindrical structure. The outer peripheral surface of the rotating shaft 130 is provided with a spiral travel groove, and the sliding assembly 120 is engaged with the rotating shaft 130 through the travel groove. When the rotating shaft 130 rotates relative to the support rod 110, the sliding assembly 120 engaged with the travel groove drives the electrode unit group 300 to be able to move along the axial direction of the rotating shaft 130.

[0050] Specifically, in a preferred embodiment. The rotating shaft 130 is provided with a first travel groove 131 and a second travel groove 132 which are adjacent to each other in the axial direction. The second travel groove 132 is provided at one end of the rotating shaft 130 close to the electrode unit group 300. The first travel groove 131 and the second travel groove 132 are engaged with different sliding assemblies 120, and the spiral pitch of the first travel groove 131 is greater than the spiral pitch of the second travel groove 132, so as to drive the sliding assemblies 120 to move at different speeds.

[0051] Each sliding component 120 is respectively connected to the rotating shaft 130 through a notch. The sliding component 120 is used to carry the electrode unit 310. In this way, a plurality of electrode units 310 are equidistantly installed on each surface of the outer peripheral surface of the support rod 110 along the circumferential direction of the support rod 110. Specifically, the sliding component 120 includes a slider 121 and a rotatable follower wheel 122. One end of the follower wheel 122 is limited in the stroke groove of the rotating shaft 130, and the slider 121 is installed at the end of the follower wheel 122 away from the rotating shaft 130.

[0052] In some embodiments, the sliding components 120 are preferably divided into three groups. Each group of sliding component groups includes two sliding components 120 symmetrically distributed along the radial direction of the support component 100. Each sliding component 120 is used to carry an electrode unit 310. The two sliding components 120 in each group of sliding component groups are respectively symmetrically installed on the outer peripheral surface of the rotating shaft 130. In this way, a plurality of sliding components 120 are equidistantly installed on the rotating shaft 130 along the circumferential direction. Specifically, the follower wheel 122 of one group of sliding component groups is limited in the first stroke groove 131, and the follower wheel 122 of another group of sliding component groups is limited in the second stroke groove 132. Since the spiral pitch of the first stroke groove 131 is greater than the spiral pitch of the second stroke groove 132, when the rotating shaft 130 rotates relative to the support rod 110, the distance that one group of electrode unit groups 300 moves along the axial direction of the rotating shaft 130 is greater than the distance that another group of electrode unit groups 300 moves along the axial direction of the rotating shaft 130. Thus, when in the released state, multiple groups of electrode unit groups 300 can be located at the same position along the axial direction of the support rod 110, and when in the contracted state, they are arranged in a staggered manner in the axial direction of the support rod 110.

[0053] In some embodiments, the electrode unit group 300 is preferably three groups. Each group of electrode unit groups 300 includes two electrode units 310 symmetrically arranged along the radial direction of the support component 100, and there are a total of six electrode units 310. One group of electrode unit groups 300 is fixedly arranged on the support rod 110, and the other two groups of electrode unit groups 300 can move along the axial direction of the support rod 110 driven by the sliding member. When all the electrode units 310 are in the released state at the same time, multiple groups of electrode unit groups 300 are located at the same position in the axial direction of the support component 100, and all the electrode units 310 are spliced into a ring-shaped electrode. When all the electrode units 310 are in the contracted state at the same time, multiple groups of electrode unit groups 300 are successively located at different positions in the axial direction of the support component 100. The purpose of setting two groups of electrode unit groups 300 that can move along the axial direction of the support rod 110 so that the three groups of electrode unit groups 300 are arranged in a staggered manner in the axial direction of the support rod 110 when in the contracted state is to avoid interference between the electrodes 311 of the three groups of electrode unit groups 300 during the contraction process, so that the second radial dimension after contraction can reach the minimum.

[0054] In some embodiments, each electrode unit 310 includes an electrode 311 with an arc-shaped welding surface, a link assembly 312, and a driving assembly 313. Six electrodes 311 are evenly distributed in sequence along the circumference of the support assembly 100, and the circumferential angle occupied by each electrode 311 is 60 degrees. One end of the link assembly 312 of one electrode unit group 300 close to the support assembly 100 is fixedly arranged on the support rod 110, and one end of the two link assemblies 312 arranged oppositely in the other two electrode unit groups 300 close to the support assembly 100 is respectively connected to a sliding assembly 120. Thus, when the rotating shaft 130 rotates relative to the support rod 110, the sliding assembly 120 can move along the stroke groove relative to the rotating shaft 130, thereby driving the electrode unit 310 to move along the axial direction of the support rod 110.

[0055] Specifically, in some embodiments, as Figure 7 shown, the link assembly 312 has a parallelogram structure, including a top plate 3121, a bottom plate 3122, a front plate 3123, and a rear plate 3124. The top plate 3121 and the bottom plate 3122 are parallel to each other, and the front plate 3123 and the rear plate 3124 are also parallel to each other. The top plate 3121 is located at one end close to the electrode 311, and the bottom plate 3122 is located at one end far from the electrode 311. The two side lines at the opposite ends of the bottom plate 3122 and the top plate 3121 are perpendicular to the axial direction of the support rod 110. One end of the top plate 3121 in the thickness direction is fixedly connected to the electrode 311. One end of the front plate 3123 and the rear plate 3124 is respectively rotatably hinged to the opposite ends of the top plate 3121 in the length direction, and the other end of the front plate 3123 and the rear plate 3124 is also respectively rotatably hinged to the opposite ends of the bottom plate 3122 in the length direction. The rear plate 3124 is rotatably connected to the output shaft of the driving assembly 313. The driving assembly 313 is preferably a push-pull cylinder, and the driving assembly 313 can drive the front plate 3123 and the rear plate 3124 to rotate relative to the bottom plate 3122 and the top plate 3121 respectively and simultaneously with the direction perpendicular to the axial direction of the support rod 110 as the rotation axis. The bottom plate 3122 of the link assembly 312 in one electrode unit group 300 is fixedly arranged on the support rod 110, and the bottom plate 3122 of the link assembly 312 in the other two electrode unit groups 300 is connected to the slider 121 of the sliding assembly 120 and can move along the axial direction of the support rod 110.

[0056] Thus, in the three groups of electrode unit groups 300, each connecting rod assembly 312 in the six electrode units 310 is connected to a driving assembly 313, and each driving assembly 313 can drive the front plate 3123 and the rear plate 3124 of the connecting rod assembly 312 to rotate relative to the bottom plate 3122 and the top plate 3121 in a direction perpendicular to the axial direction of the support rod 110 at the same time, so that the electrode 311 is close to or away from the support rod 110 to be in a contracted or released state. The connecting rod assemblies 312 of the two groups of electrode unit groups 300 can also carry the electrode 311 to move along the axial direction of the support assembly 100, so that each electrode 311 will not collide with each other when contracting. When all the electrodes 311 are in a released state and spliced ​​together, a complete annular electrode is formed, so that the annular electrode can perform roll welding operations on the circular cage reinforcement.

[0057] When the above-mentioned electrode mechanism 10 is in specific operation and performing roll welding, the driving assembly 313 drives the front plate 3123 and the rear plate 3124 of the connecting rod assembly 312 to rotate relative to the bottom plate 3122 and the top plate 3121 around the direction perpendicular to the axial direction of the support rod 110, so that the front plate 3123 and the rear plate 3124 are perpendicular to the bottom plate 3122, and the rotating shaft 130 rotates relative to the support rod 110 to move the two groups of electrode unit groups 300 toward the direction close to the other group of electrode unit groups 300, and the six electrodes 311 are in a released state and closed into an annular electrode, and the annular electrode is driven by an external motor to perform roll welding operations on the circular cage reinforcement.

[0058] When it is necessary to pass through the internal through hole of the end plate, all electrodes 311 push the connecting rod assembly 312 forward under the drive of their respective connected driving assemblies 313, and the front plate 3123 and the rear plate 3124 of the connecting rod assembly 312 rotate relative to the bottom plate 3122 and the top plate 3121 around the direction perpendicular to the axial direction of the support rod 110, thereby driving the single electrode 311 to retract, and the rotating shaft 130 rotates in the opposite direction relative to the support rod 110, so that two groups of electrode unit groups 300 move away from the other group of electrode unit groups 300, so that the size of the multiple groups of electrode unit groups in the radial direction of the support assembly is minimized, thereby facilitating the electrode mechanism 10 to pass through the internal through hole of the end plate. After the electrode mechanism 10 completely passes through the internal through hole of the end plate, the three groups of electrode unit groups 300 return to the released state and close into a ring electrode for roll welding.

[0059] It should be noted that although the electrode unit 310 of the above-mentioned electrode mechanism 10 can be shrunk, thereby reducing the size of the multiple groups of electrode units in the radial direction of the support component so that the electrode mechanism 10 can pass through the center holes of the end plates and the head and tail plates of the circular cage reinforcement to enter the interior of the circular cage reinforcement for roll welding operations, roll welding operations can also be performed on the outside of the circular cage reinforcement, which is not limited here.

[0060] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0061] The above-described embodiments only express one implementation manner of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electrode mechanism, characterized in that, Comprising: A motor; A support assembly, one end of the support assembly being a welding end and the other end being connected to the motor; the support assembly includes a support rod and a rotating shaft, the support rod is provided with a central through hole extending along its own length direction, the rotating shaft is received in the central through hole and is coaxially arranged with the support rod, and a travel groove extending spirally along the axial direction of the rotating shaft is provided on the outer peripheral surface of the rotating shaft; and Multiple groups of electrode unit groups, movably mounted on the welding end of the support assembly, each group of the electrode unit groups includes two electrode units symmetrically arranged along the radial direction of the support assembly, and all the electrode units are arranged in sequence around the circumference of the support assembly; at least one group of the electrode unit groups is engaged with the travel groove, and the rotating shaft can be driven by the motor to rotate relative to the support rod with the central axis of the support rod as the rotation axis, so as to drive the electrode unit group to move along the axial direction of the support assembly, so that at least two groups of the electrode unit groups are arranged in a staggered manner in the axial direction of the support assembly; a first travel groove and a second travel groove extending spirally along the axial direction of the rotating shaft are provided on the outer peripheral surface of the rotating shaft, the spiral pitch of the first travel groove is greater than the spiral pitch of the second travel groove, one group of the electrode unit groups is engaged with the first travel groove, and the other group of the electrode unit groups is engaged with the second travel groove; when the rotating shaft rotates relative to the support rod, the moving distance of the electrode unit group engaged with the first travel groove along the axial direction of the rotating shaft is greater than the moving distance of the electrode unit group engaged with the second travel groove along the axial direction of the rotating shaft; Each of the electrode units can also be controlled to approach or move away from the support assembly, so as to change the size of the electrode unit group in the radial direction of the support assembly; when multiple groups of the electrode unit groups are located at the same position in the axial direction of the support assembly, the multiple groups of the electrode unit groups have a first radial size; when at least two groups of the electrode unit groups are arranged in a staggered manner in the axial direction of the support assembly, the multiple groups of the electrode unit groups have a second radial size; the first radial size is greater than the second radial size.

2. The electrode mechanism according to claim 1, characterized in that, The electrode mechanism further includes a sliding assembly, one end of the sliding assembly is limited in the travel groove, and the other end of the sliding assembly extends out of the support rod to connect the electrode unit, and the sliding assembly moves along the axial direction of the support rod under the drive of the rotating shaft.

3. The electrode mechanism according to claim 2, characterized in that, The support rod is provided with a plurality of notches along the circumference, the length direction of the notches is parallel to the axial direction of the support rod, the notches communicate with the central through hole of the support rod, and the sliding assembly can pass through the notches to be connected with the rotating shaft.

4. The electrode mechanism according to claim 2, characterized in that, The sliding assembly includes a slider and a rotatable follower wheel, one end of the follower wheel is limited in the travel groove of the rotating shaft, and the slider is mounted at the end of the follower wheel away from the rotating shaft.

5. The electrode mechanism according to claim 1, characterized in that, The electrode unit can be controlled to rotate around an axis perpendicular to the axial direction of the support assembly while approaching or moving away from the support assembly in the radial direction of the support assembly.

6. The electrode mechanism according to claim 5, characterized in that, The electrode unit includes: A link assembly, engaged with the support assembly; An electrode, mounted on the link assembly; and A drive assembly, movably connected to the link assembly; The link assembly drives the electrode to rotate about an axis perpendicular to the axial direction of the support assembly while moving closer to or away from the support assembly in the radial direction of the support assembly under the drive of the drive assembly.

7. The electrode mechanism according to claim 6, characterized in that, When multiple groups of the electrode unit groups are located at the same position in the axial direction of the support assembly, all the electrodes are jointly spliced into an annular electrode.

8. The electrode mechanism according to claim 6, characterized in that, The link assembly includes a top plate, a bottom plate, a front plate, and a rear plate, wherein the top plate and the bottom plate are parallel to each other, the front plate and the rear plate are also parallel to each other, one end of the top plate in the thickness direction is fixedly connected to the electrode, one ends of the front plate and the rear plate are respectively rotatably hinged to opposite ends of the top plate in the length direction, the other ends of the front plate and the rear plate are also respectively rotatably hinged to opposite ends of the bottom plate in the length direction, and the rear plate is rotatably connected to the output shaft of the drive assembly.

9. The electrode mechanism according to claim 7, characterized in that, There are three groups of the electrode unit groups, wherein the link assembly of one of the electrode unit groups is fixedly arranged on the support rod, and the link assemblies of the other two electrode unit groups can move along the axial direction of the support rod.

10. A seam welder, characterized in that, Comprising the electrode mechanism according to any one of claims 1 to 9.

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