阅读说明：本技术 电极机构及滚焊机 (Electrode mechanism and seam welder ) 是由 杨余明 黄兴煌 于 2021-09-30 设计创作，主要内容包括：本发明涉及一种电极机构及滚焊机,电极机构包括主轴组件、电极单元、电流传导组件、连杆组件、第一驱动组件以及第二驱动组件；电流传导组件用于将电流传导至电极单元；电极单元能够在第二驱动组件的驱动下跟随主轴组件绕主轴组件的轴向方向旋转；连杆组件能够在第一驱动组件的驱动下推动电极单元以主轴组件的径向方向为轴相对于主轴组件旋转,使电极单元处于收缩或展开状态以改变电极单元在主轴组件的径向上的尺寸,从而使电极单元在处于收缩状态时电极单元在主轴组件的径向上尺寸远小于调节前的尺寸,方便电极机构穿过端板、头板和尾板的中心圆孔进入圆形笼筋的内部,进而使电极单元在处于展开状态时在圆形笼筋内部进行滚焊操作。(The invention relates to an electrode mechanism and a seam welder, wherein the electrode mechanism comprises a main shaft assembly, an electrode unit, a current conduction assembly, a connecting rod assembly, a first driving assembly and a second driving assembly; the current conducting assembly is used for conducting current to the electrode unit; the electrode unit can rotate around the axial direction of the spindle assembly along with the spindle assembly under the driving of the second driving assembly; the connecting rod assembly can push the electrode unit under the drive of the first drive assembly to rotate relative to the main shaft assembly by taking the radial direction of the main shaft assembly as an axis, so that the electrode unit is in a contraction or expansion state to change the radial size of the electrode unit on the main shaft assembly, and the radial size of the electrode unit is far smaller than the size before adjustment when the electrode unit is in the contraction state, so that the electrode mechanism can conveniently penetrate through central round holes of the end plate, the head plate and the tail plate to enter the inside of the circular cage rib, and the electrode unit can be subjected to roll welding operation inside the circular cage rib when being in the expansion state.)

1. An electrode mechanism, comprising:

a spindle assembly;

the electrode unit is movably connected to the spindle assembly and can synchronously rotate around the axial direction of the spindle assembly along with the spindle assembly; and

the first driving assembly is connected to one end, far away from the electrode unit, of the spindle assembly and is in transmission connection with the electrode unit;

the electrode unit can rotate around a direction perpendicular to the axial direction of the spindle assembly under the driving of the first driving assembly so as to change the size of the electrode unit in the radial direction of the spindle assembly.

2. The electrode mechanism according to claim 1, wherein the electrode unit comprises a guide plate and an electrode mounted at one end of the guide plate, the guide plate is in transmission connection with the first driving component, and the guide plate is driven by the first driving component to rotate so as to switch the electrode unit between the expanded state and the contracted state;

when the electrode unit is in the deployed state, the electrode is located on one side in a radial direction of the spindle assembly, and a dimension of the electrode unit in the radial direction of the spindle assembly is at a maximum; when the electrode unit is in the contracted state, the electrode is located on one side in the axial direction of the spindle assembly, and the dimension of the electrode unit in the radial direction of the spindle assembly is at a minimum.

3. The electrode mechanism of claim 2, further comprising a linkage assembly drivingly connecting the first drive assembly and the guide plate, the linkage assembly being configured to rotate the guide plate about a direction perpendicular to the axial direction of the spindle assembly when the first drive assembly urges the guide plate to rotate.

4. The electrode mechanism as claimed in claim 3, wherein the electrode unit further includes a fixing base fixedly connected to the guide plate, the fixing base is fixedly provided with a first rotating shaft and a second rotating shaft at intervals along a length direction of the electrode unit, the first rotating shaft is rotatably connected to one end of the connecting rod assembly, the second rotating shaft is rotatably connected to one end of the main shaft assembly away from the first driving assembly, and the first rotating shaft can rotate by taking the second rotating shaft as a rotating shaft so that the electrode is located on one side in a radial direction or one side in an axial direction of the main shaft assembly.

5. The electrode mechanism of claim 4, wherein the position at which the guide plate is mounted to the fixing base is changeable along the length direction of the guide plate, so that the dimension of the electrode unit in the radial direction of the spindle assembly is adjustable.

6. The electrode mechanism as claimed in claim 5, wherein the electrode unit further comprises a detent element that is confined to a mounting gap between the guide plate and the holder; the deflector is close to the one end of screens component has multiunit interval distribution's keyway group along length direction, and every group keyway group includes many interval distribution's keyway, the screens component is close to the one end of deflector has a set of key group, and is a set of the key group has many interval distribution's key, and is a set of in the key group the quantity of key is less than a set of in the keyway group the quantity of keyway, a set of the screens component the key group optionally block in arbitrary a set of the deflector the keyway group makes every the key block respectively in one the keyway.

7. The electrode mechanism as claimed in claim 6, wherein an elastic element is mounted on the end of the fixing base along the length direction of the guide plate and away from the electrode, so that the electrode can elastically retract after being subjected to an external force.

8. The electrode mechanism of claim 3, wherein the spindle assembly includes an outer shaft having a central bore coaxial with the outer shaft and an inner shaft coupled to the outer shaft and having one end received in the central bore of the outer shaft; the electrode mechanism further comprises a second driving component, the outer shaft is connected to the second driving component, one end, far away from the outer shaft, of the inner shaft is connected to the first driving component, and the inner shaft can do linear reciprocating motion relative to the outer shaft and/or follow the outer shaft to synchronously rotate along the axial direction of the outer shaft under the action of the first driving component and/or the second driving component.

9. The electrode mechanism as claimed in claim 8, wherein the outer shaft defines a stroke slot on a shaft body thereof, the stroke slot communicates with the central hole, one end of the connecting rod assembly passes through the stroke slot and is connected to one end of the inner shaft received in the central hole, a length direction of the stroke slot is parallel to an axial direction of the outer shaft, and the connecting rod assembly is capable of reciprocating along the length direction of the stroke slot along with the inner shaft.

10. A seam welder comprising an electrode mechanism according to any of claims 1 to 9.

Technical Field

The invention relates to the field of welding, in particular to an electrode mechanism and a seam welder.

Background

The seam welder is an important machine for forming the reinforcing steel bar framework of cement products (such as drain pipes, pipe piles for high-rise buildings and partial chemical products), and is widely applied to the fields of cement products and buildings due to the reliable welding and high efficiency of the seam welder on the circular cage bars. The electrode mechanism of the seam welder is an indispensable part of the seam welder and is used for welding longitudinal steel bars distributed in the circumferential direction of the end plate and circumferential steel bars guided in by the rib guiding mechanism.

The electrode mechanism of the existing seam welder is mostly a disc electrode mechanism, the disc electrode is a whole block of conductive electrode with a round shape, and a longitudinal steel bar with upset heads at two ends sequentially penetrates from a bar penetrating disc and is attached to the outer surface of the disc electrode to be welded before seam welding. However, for end plates with different apertures, the conventional disc electrode has large radial size and difficulty in passing through central holes of the end plates and head and tail plates, so that the disc electrode cannot be welded on the inner periphery of the circular cage rib, and therefore, the conventional disc electrode can only be applied to a roll welding process on the outer peripheral surface of the circular cage rib and cannot be applied to other tubular pile cage rib processes.

Disclosure of Invention

In view of the above, it is necessary to provide an electrode mechanism with an adjustable outer diameter of an electrode, which aims at the problem that the existing disc electrode has a large diameter and cannot penetrate through the central holes of the end plate, the head plate and the tail plate of a seam welder, so that welding cannot be performed on the inner periphery of the cage rib.

According to an aspect of the present application, there is provided an electrode mechanism comprising:

a spindle assembly;

the electrode unit is movably connected to the spindle assembly and can synchronously rotate around the axial direction of the spindle assembly along with the spindle assembly; and

the first driving assembly is connected to one end, far away from the electrode unit, of the spindle assembly and is in transmission connection with the electrode unit;

the electrode unit can rotate around a direction perpendicular to the axial direction of the spindle assembly under the driving of the first driving assembly so as to change the size of the electrode unit in the radial direction of the spindle assembly.

In one embodiment, the electrode unit comprises a guide plate and an electrode arranged at one end of the guide plate, the guide plate is in transmission connection with the first driving assembly, and the guide plate is driven by the first driving assembly to rotate so as to switch the electrode unit between the expanded state and the contracted state;

when the electrode unit is in the deployed state, the electrode is located on one side in a radial direction of the spindle assembly, and a dimension of the electrode unit in the radial direction of the spindle assembly is at a maximum; when the electrode unit is in the contracted state, the electrode is located on one side in the axial direction of the spindle assembly, and the dimension of the electrode unit in the radial direction of the spindle assembly is at a minimum.

In one embodiment, the electrode mechanism further comprises a connecting rod assembly, the connecting rod assembly is in transmission connection with the first driving assembly and the guide plate, and the connecting rod assembly can push the guide plate to rotate around a direction perpendicular to the axial direction of the main shaft assembly when the first driving assembly drives the guide plate.

In one embodiment, the electrode unit further includes a fixing base fixedly connected to the guide plate, the fixing base is fixedly provided with a first rotating shaft and a second rotating shaft at intervals along a length direction of the electrode unit, the first rotating shaft is rotatably connected to one end of the connecting rod assembly, the second rotating shaft is rotatably connected to one end of the main shaft assembly, which is far away from the first driving assembly, and the first rotating shaft can rotate by using the second rotating shaft as a rotating shaft, so that the electrode is located on one side in a radial direction or one side in an axial direction of the main shaft assembly.

In one embodiment, the position of the guide plate mounted on the fixing seat can be changed along the length direction of the guide plate, so that the size of the electrode unit in the radial direction of the spindle assembly can be adjusted.

In one embodiment, the electrode unit further comprises a position-locking element, wherein the position-locking element is limited in an installation gap between the guide plate and the fixed seat; the deflector is close to the one end of screens component has multiunit interval distribution's keyway group along length direction, and every group keyway group includes many interval distribution's keyway, the screens component is close to the one end of deflector has a set of key group, and is a set of the key group has many interval distribution's key, and is a set of in the key group the quantity of key is less than a set of in the keyway group the quantity of keyway, a set of the screens component the key group optionally block in arbitrary a set of the deflector the keyway group makes every the key block respectively in one the keyway.

In one embodiment, an elastic element is installed at one end of the fixed seat along the length direction of the guide plate and away from the electrode, so that the electrode can elastically retract after being subjected to an external force.

In one embodiment, the spindle assembly includes an outer shaft having a central bore coaxial with the outer shaft and an inner shaft coupled to the outer shaft and having one end received in the central bore of the outer shaft; the electrode mechanism further comprises a second driving component, the outer shaft is connected to the second driving component, one end, far away from the outer shaft, of the inner shaft is connected to the first driving component, and the inner shaft can do linear reciprocating motion relative to the outer shaft and/or follow the outer shaft to synchronously rotate along the axial direction of the outer shaft under the action of the first driving component and/or the second driving component.

In one embodiment, a shaft body of the outer shaft is provided with a stroke groove, the stroke groove is communicated with the central hole, one end of the connecting rod assembly passes through the stroke groove and is connected with one end, accommodated in the central hole, of the inner shaft, the length direction of the stroke groove is parallel to the axial direction of the outer shaft, and the connecting rod assembly can move linearly and reciprocally along the length direction of the stroke groove along with the inner shaft.

According to another aspect of the application, a seam welder is provided, comprising the seam welding electrode mechanism.

The electrode mechanism is movably connected to the main shaft assembly, the two different driving assemblies are arranged, the electrode unit is controlled to move relative to the main shaft unit and rotate relative to the main shaft assembly, the electrode unit of the electrode mechanism can be in a contraction or expansion state to change the radial size of the electrode unit on the main shaft assembly, the radial size of the electrode mechanism on the main shaft assembly is far smaller than the size before adjustment when the electrode unit is in the contraction state, the electrode mechanism can conveniently penetrate through central round holes of the end plate, the head plate and the tail plate to enter the circular cage rib, and the electrode unit can rotate to perform roll welding operation around the circumferential direction of the circular cage rib when the electrode unit is in the expansion state.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other embodiments can be obtained from the drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electrode mechanism provided in an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an alternative angle of an electrode mechanism provided in an embodiment of the present invention;

FIG. 3 is a front view of an electrode mechanism according to an embodiment of the present invention, in which the electrode unit is in a deployed state;

FIG. 4 is a left side view of an electrode mechanism according to an embodiment of the present invention, with the electrode unit in a deployed state;

fig. 5 is a front view of an electrode mechanism in which an electrode unit is in a contracted state, according to an embodiment of the present invention;

FIG. 6 is a left side view of an electrode mechanism according to an embodiment of the present invention, in which the electrode unit is in a contracted state;

FIG. 7 is a sectional view taken along line A-A of FIG. 5;

FIG. 8 is an enlarged view of area B of FIG. 3;

FIG. 9 is an enlarged view of area C of FIG. 1;

fig. 10 is an enlarged schematic view of region D in fig. 1.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "up," "down," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Referring to fig. 1 and 2, an embodiment of the present invention provides a welding apparatus (not shown) including an electrode mechanism 10, wherein the electrode mechanism 10 is configured to provide one electrode 410 for cage bar seam welding and to provide stable support for another electrode rotating around the electrode 410.

The structure of the electrode mechanism 10 in the present application will be described below by taking a welding apparatus as a seam welder as an example. The present embodiment is described as an example, and the technical scope of the present application is not limited thereto. It is understood that in other embodiments, the welding device may also be embodied as other devices equipped with the electrode mechanism 10 of the present application, and is not limited thereto.

The electrode mechanism 10 shown in fig. 1 and 2 includes a stationary support 100, a spindle assembly 200, a linkage assembly 300, an electrode unit 400, a first drive assembly 500, a second drive assembly 600, and a current conducting assembly 700. The spindle assembly 200 is mounted on the fixed support 100, and one end of the spindle assembly 200 is a welding end of the electrode mechanism 10. An electrode unit 400 is movably attached to the welding end of the spindle assembly 200 for providing an electrode 410 for a seam welding operation. One end of the link assembly 300 is movably connected to the electrode unit 400, and the other end is movably connected to the spindle assembly 200; first drive assembly 500 and second drive assembly 600 are each coupled to spindle assembly 200. The first driving assembly 500 is used for controlling the movement of the connecting rod assembly 300, so that the connecting rod assembly 300 can drive the electrode unit 400 to move relative to the spindle assembly 200, and the second driving assembly 600 is used for driving the spindle assembly 200 to rotate along the axis direction thereof. The current conducting assembly 700 is mounted to the spindle assembly 200 and electrically connected to the electrode unit 400 for conducting an external current to the electrode unit 400.

Under the driving of the second driving assembly 600, the spindle assembly 200 can rotate around its own axial direction, so as to drive the connecting rod assembly 300 and the electrode unit 400 to rotate along with the spindle assembly 200 itself, so that the electrode unit 400 can perform a seam welding operation around the circular cage bar by using the axial direction of the spindle assembly 200 as a rotating axis. Under the driving of the first driving assembly 500, the link assembly 300 can push the electrode unit 400 to rotate relative to the spindle assembly 200 about an axial direction perpendicular to the spindle assembly 200, so that the electrode unit 400 is in a contracted or expanded state to change the size of the electrode unit 400 in a radial direction of the spindle assembly 200. When the electrode unit 400 is in the expanded state, the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at a maximum, and when the electrode unit 400 is in the contracted state, the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at a minimum.

When the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at the minimum, 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 to enter the inside of the circular cage rib, so that the circular cage rib is coaxially sleeved on the periphery of the spindle assembly 200 of the electrode mechanism 10; when the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at a maximum, the electrode unit 400 can perform a roll welding operation around the circular cage bar while rotating around the spindle assembly 200.

With continued reference to fig. 1 and 2, in some embodiments, the fixing base 100 is used to provide support for the electrode mechanism 10, and the fixing base 100 includes a base plate 110, a support plate 120 and a seat cover 130, wherein the bottom of the support plate 120 is mounted on the base plate 110, and the height of the support plate 120 is determined by the height of the cage bar mounted on the seam welder. The seat cover 130 is mounted on the top plate of the support plate 120, and the seat cover 130 is of a cylindrical structure and is provided with a through hole communicated with the head end and the tail end. Thus, the spindle assembly 200 passes through the through hole of the sleeve 130 to be mounted on the fixed support 100, the middle portion of the spindle assembly 200 along the length direction is received in the through hole of the sleeve 130, and both ends of the spindle assembly 200 are exposed out of the sleeve 130.

The second driving assembly 600 comprises a three-phase variable frequency motor, the top of the second driving assembly 600 is fixedly arranged below the fixed support 100, and the bottom of the second driving assembly 600 is fixedly arranged on a plane, which can be the ground or a plane of the seam welder.

In some embodiments, the bottom plate 110 and the support plate 120 of the fixing base 100 and the housing of the second driving assembly 600 are made of insulating materials, and the fixing base 100 and the second driving assembly 600 are also kept insulated after being mounted together, so as to ensure the safety in use.

In some embodiments, as shown in fig. 7, the spindle assembly 200 includes a hub 210, an outer shaft 220, an inner shaft 230, a sleeve 240, and a conductive disk 250. The shaft sleeve 210 is received in the through hole of the seat cover 130, and one end of the shaft sleeve abuts against the seat cover 130. The shaft sleeve 210 has a through hole coaxial with itself, and two bearings are respectively installed at both ends of the through hole of the shaft sleeve 210. The outer shaft 220 is disposed through the through hole of the shaft sleeve 210 and coupled to the bearing in the shaft sleeve 210, a chain wheel 260 is installed at one end of the outer shaft 220 extending out of the shaft sleeve 210, the chain wheel 260 is connected to the output shaft of the second driving assembly 600 through a chain, and the outer shaft 220 has a central hole coaxial with itself. The sleeve 240 is coaxially installed in the central hole of the outer shaft 220 by interference fit, one end of the sleeve 240 is exposed out of the outer shaft 220, and the sleeve 240 has a through hole coaxial with itself. The conductive disc 250 is sleeved on one end of the sleeve 240 exposed to the outer shaft 220, the conductive disc 250 is used for connecting the current conducting assembly 700 to conduct current, and the outer diameter of the conductive disc 250 is larger than that of the sleeve 240. One end of the inner shaft 230 penetrates the through hole of the sleeve 240 and is coupled to the outer shaft 220, and the sleeve 210, the outer shaft 220, the sleeve 240, the inner shaft 230 and the conductive disc 250 of the main shaft assembly 200 can synchronously rotate around the axial direction thereof under the driving of the second driving assembly 600.

In some embodiments, the end of the inner shaft 230 of the spindle assembly 200 remote from the outer shaft 220 is connected to a first drive assembly 500, and the first drive assembly 500 is preferably a pneumatic cylinder. The output shaft of the first driving assembly 500, i.e. one end of the piston, is connected to one end of the inner shaft 230 away from the outer shaft 220, so that the piston of the cylinder can push the inner shaft 230 to reciprocate back and forth along the axial direction of the central hole of the outer shaft 220 when reciprocating linearly. Specifically, an end of the inner shaft 230 remote from the outer shaft 220 is connected to an output shaft of the first drive assembly 500 through two thrust ball bearings, one of which is connected to a piston rod of the first drive assembly 500, and the other of which is connected to an end of the inner shaft 230, so that the inner shaft 230 can reciprocate back and forth in an axial direction of the outer shaft 220 while synchronously rotating along with the outer shaft 220.

The end of the outer shaft 220 remote from the first drive assembly 500 also mounts the linkage assembly 300 and the electrode unit 400. In some embodiments, as shown in fig. 7, the outer shaft 220 has a stroke slot 221 formed on the shaft body thereof, the length direction of the stroke slot 221 is parallel to the axial direction of the outer shaft 220, the stroke slot 221 is communicated with the central hole of the outer shaft 220, one end of the linkage assembly 300 is rotatably connected to one end of the inner shaft 230 away from the first driving assembly 500, and the other end of the linkage assembly 300 is movably connected to the electrode unit 400.

Referring to fig. 7 and 8, in particular, in some embodiments, the connecting rod assembly 300 includes a guide rod 310, a connecting rod intermediate shaft 320, and an eccentric stem 330. One end of the guide rod 310 is fixedly connected to one end of the eccentric stem 330, the other end of the guide rod 310 is rotatably connected to one end of the link intermediate shaft 320, the other end of the link intermediate shaft 320 passes through the stroke slot 221 into the central hole of the outer shaft 220 to be connected to one end of the inner shaft 230 located in the central hole of the outer shaft 220, and the other end of the eccentric stem 330 is preferably hinged to the electrode unit 400.

In some embodiments, as shown in fig. 2, 8 and 9, the electrode unit 400 includes an electrode 410, an electrode holder 420, a guide plate 430 and a holder 440. Specifically, in a preferred embodiment, the electrode 410 is used for contacting the cage bar and for roll welding, one end of the electrode 410 is in a circular arc shape, and the other end of the electrode 410 is fixed to one end of the guide plate 430 in the length direction. One side of the guide plate 430, which is far away from the electrode 410, is fixedly connected to the fixed seat 440, the fixed seat 440 is fixedly provided with a first rotating shaft 480 and a second rotating shaft (not shown) at intervals along the length direction of the electrode unit 400, the first rotating shaft 480 is preferably hinged to the eccentric rotating handle 330 of the connecting rod assembly 300, the second rotating shaft is rotatably connected to one end of the spindle assembly 200, which is far away from the first driving assembly 500, and the electrode seat 420 is mounted at one end of the spindle assembly 200, which is close to the electrode unit 400, and is in contact with the electrode 410 for transmitting current to the electrode 410; the first shaft 480 is rotatable about the second shaft as a rotation axis.

In this way, when the output end of the first driving assembly 500 performs a pushing-out motion along the axial direction of the spindle assembly 200, the output end can move along the stroke slot 221 of the middle shaft 220 and the outer shaft 220 of the spindle assembly 200 through one end of the guide rod 310 of the connecting rod assembly 300, and drive the eccentric stem 330 to push the fixed seat 440, so that the fixed seat 440 rotates 90 degrees around the rotation axis. When the fixing base 440 rotates 90 degrees, the guide plate 430 and the electrode 410 mounted on the fixing base 440 rotate 90 degrees together.

Through the above actions, the electrode unit 400 can be in a contracted state, as shown in fig. 5 and 6, at this time, when viewed from the axial direction of the spindle assembly 200, the size of the rotated electrode unit 400 in the radial direction of the spindle assembly 200 is greatly reduced, at this time, the electrode 410 is located on one side in the axial direction of the spindle assembly 200, and the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at a minimum, so that the electrode mechanism 10 can be conveniently extended into the interior of the circular cage rib from the central holes of the end plate, the head plate and the tail plate of the seam welder to perform seam welding operation inside or be extended out of the interior of the circular cage rib.

In some embodiments, as shown in fig. 3 and 8, the electrode unit 400 further includes a limiting seat 450, and the limiting seat 450 is connected to the fixing seat 440 and can move along with the fixing seat 440, the guide plate 430 and the electrode 410, so as to enable the electrode unit 400 to rotate to an accurate preset position.

As such, when the electrode unit 400 is rotated by 0 to 90 degrees to be in the contracted state or the expanded state, it can be ensured that the electrode unit 400 has an accurate rotation angle.

In some embodiments, as shown in fig. 9, a plurality of waist holes 431 are further formed at intervals in the guide plate 430 along the length direction thereof, the fixing seat 440 can be selectively retained in one of the waist holes 431 by a fixing member, so that the installation position of the guide plate 430 and the fixing seat 440 along the length direction thereof can be changed, and when the fixing seat 440 is retained in different waist holes 431, the electrode unit 400 has different sizes in the radial direction of the spindle assembly 200.

In this way, the size of the electrode unit 400 in the radial direction of the spindle assembly 200 can be adjusted, so that the size of the electrode unit 400 in the radial direction of the spindle assembly 200 corresponds to the diameter of the circular cage bars of different specifications, and the electrode mechanism 10 of the seam welder can perform seam welding operation on the circular cage bars of different diameters.

In some embodiments, as shown in fig. 9, the electrode unit 400 further includes a locking element 460, the locking element 460 is limited by a fixing member in a mounting gap between the guide plate 430 and the fixing base 440, one end of the guide plate 430 close to the locking element 460 is provided with a plurality of key slot sets distributed at intervals along a length direction, each key slot set includes a plurality of key slots 432 distributed at intervals, one end of the locking element 460 close to the guide plate 430 is provided with a key set, the key set includes a plurality of keys 461 distributed at intervals, and the number of the key sets is less than the number of the key slots 432 in one key slot set in the locking element 460, and one key set selectively engages with any one key slot set of the guide plate 430, so that each key 461 is locked in one key slot 432.

Thus, by arranging a plurality of key groove groups and arranging that the number of the key grooves 432 in one key groove group is greater than the number of the keys 461 in one key groove group, one key group can be selectively clamped in different key groove groups, and the keys 461 in one key group can also be clamped in the key grooves 432 at different positions in one key groove group, so that the position of the guide plate 430 limited on the clamping element 460 can be finely adjusted along the length direction of the guide plate 430, so that the radial dimension of the electrode unit 400 in the spindle assembly 200 can be slightly adjusted, and the diameter of the worn electrode 410 can be supplemented by matching with the small stroke adjustment of the fixing member in the waist hole 431, thereby overcoming the problems that the existing copper electrode is worn quickly and needs to be replaced frequently, greatly enhancing the durability of the electrode 410 and prolonging the service life.

In some embodiments, as shown in fig. 10, an elastic element 470, preferably a spring assembly, is further installed at an end of the fixing seat 440 of the electrode unit 400 away from the electrode 410, and can provide a small elastic moving space, so as to prevent the electrode 410 from colliding with the cage bars during the roll welding operation and elastically retracting to avoid the collision.

In some embodiments, as shown in fig. 2, the current conducting assembly 700 includes an outer conductive row 710, a conducting module 720, and an intermediate conductive row 730; the outer conductive bar 710, the conductive block 720 and the middle conductive bar 730 are mounted on the fixed support 100, and the outer conductive bar 710 is preferably electrically connected to the conductive block 720 through soft copper, the conductive block 720 is electrically connected to the middle conductive bar 730 through the spindle assembly 200, and the middle conductive bar 730 is also preferably electrically connected to the electrode base 420 through soft copper, so that an outer current can be conducted to the electrode 410.

In some embodiments, as shown in fig. 10, the conductive module 720 includes a conductive plate 721, a support post 722, and a carbon brush 723. The conductive plate 721 is preferably a plate-shaped structure and is fixedly mounted on the fixed support 100, the support columns 722 are preferably a plurality of cylindrical rod-shaped structures, and are arranged around the inner shaft 230 of the spindle assembly 200 at intervals along an arc direction of a certain angle, one end of each support column 722 is fixedly mounted on the conductive plate 721, and the other end is connected with a carbon brush 723, so that the carbon brushes 723 are correspondingly a plurality of ones, and correspondingly elastically contact the conductive plate 250 of the spindle assembly 200 at intervals along the arc direction. The arrangement of the carbon brushes 723 in the arc direction at intervals can facilitate the operation and observation of a user. Thus, with the above arrangement, the low-voltage large current required by the electrode 410 is introduced into the rotating conductive disc 250 and the sleeve 240 through the conductive module 720 after being connected by the external conductive bar 710, and then is conducted to the middle conductive bar 730, and then is conducted to the electrode holder 420 through the flexible copper strip, and finally is conducted to the electrode 410.

In some embodiments, the conduction module 720 further includes a carbon brush guide mount 724, a plurality of compression springs 725, and a compression adjustment screw 726. The carbon brush guide fixing frame 724 is in a polygonal strip structure, and is simultaneously surrounded and fixedly connected to the plurality of supporting columns 722 to keep the plurality of supporting columns 722 fixed, so that the plurality of supporting columns 722 are prevented from being scattered when the outer shaft 220 rotates and rubs with the carbon brush 723 to influence current conduction. A plurality of compression springs are installed between the conductive plate 250 and the conductive plate 721, and the compression adjusting screw 726 is used to tightly install the compression spring 725, and the compression spring 725 can tightly attach the carbon brush 723 to the conductive plate 250 by means of the elasticity of the spring, so that the current can be sufficiently introduced into the rotating conductive plate 250 and the sleeve 240.

In the electrode mechanism, when the roll welding operation is performed, the electrode unit 400 needs to be in the unfolded state, and at this time, the output end of the first driving assembly 500 is pulled back in the opposite direction, and returns back in the opposite direction along the stroke slot 221 of the outer shaft 220 in the spindle assembly 200 through one end of the guide rod 310 of the connecting rod assembly 300, and drives the eccentric rotation handle 330 to pull the fixing seat 440, so that the fixing seat 440 rotates 90 degrees in the opposite direction around the rotation axis to return to the initial position. By the above action, the electrode unit 400 can be returned to the deployed state again, as shown in fig. 3 and 4, when the electrode 410 is located on one side in the radial direction of the spindle assembly 200 as viewed in the axial direction of the spindle assembly 200, and the size of the electrode unit 400 in the radial direction of the spindle assembly 200 is at a maximum. At this time, the size of the electrode unit 400 in the radial direction of the spindle assembly 200 in the space is suitable for serving as a pressure support for resistance welding of a cage rib of a corresponding model and a function as a negative electrode, the second driving assembly 600 starts to operate to drive the spindle assembly 200 to rotate around the axial direction of the second driving assembly, so as to drive the guide rod 310, the eccentric rotating handle 330, the fixed seat 440, the guide plate 430 and the electrode 410 which are installed on the spindle assembly 200 to rotate together, and the electrode 410 can rotate around the circular cage rib as the negative electrode to perform roll welding operation. In some embodiments, the angular velocity at which spindle assembly 200 rotates is matched to the rotational velocity of the positive electrode media by an encoder to enable electrode 410 to weld precisely at the predetermined location of the circular cage bars.

In this way, the electrode unit 400 can be rotated by 90 degrees, so that the size of the electrode unit 400 in the radial direction of the main shaft assembly 200 in the electrode mechanism 10 can be changed from a large size to a small size, so that the electrode mechanism 10 can penetrate through the central through holes of the end plate, the head plate and the tail plate of the circular cage bar, and the resistance welding principle is utilized to provide a support with large pressure inside the circular cage bar while serving as a negative electrode, so as to ensure the quality of a welded product.

It should be noted that, although the electrode unit 400 of the electrode mechanism 10 can be contracted, so that the size of the electrode unit in the radial direction of the spindle assembly is reduced, so that the electrode mechanism 10 can pass through the central holes of the end plates and the head and tail plates of the circular cage bar to enter the inside of the circular cage bar for performing the roll welding operation, the roll welding operation may be performed outside the circular cage bar, and the present invention is not limited thereto.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express one of the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.