Lifting platform and spot welding equipment

Abstract

The invention discloses a lifting platform and spot welding equipment, and relates to the technical field of welding equipment.The lifting platform comprises a first module, a second module and a third module, and the three modules are matched with one another to achieve space moving position adjustment of a spot welding jig fixed to the first module. The lifting structure of the lifting platform is optimized, specifically, the second module used for achieving the lifting action is mainly modified, stable operation of the second platform in the lifting process is achieved through the guide assembly, automatic lifting of the second platform is achieved through the driving assembly, and compared with the prior art, the synchronous structure is additionally arranged, so that the synchronous lifting operation is achieved. And the synchronous structure is matched with the guide structure, so that the lifting force generated by the driving assembly synchronously and uniformly acts on the second platform. Even under the conditions that the first module is large in span, high in weight and variable in gravity center, the second module can be stably lifted, the stability of the lifting platform under the high-frequency use condition is guaranteed, and the welding quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of welding equipment, and in particular to a lifting platform and spot welding equipment. Background Art

[0002] Various typical structures of automobile bodies, such as guide rails, center pillars, triangle plates, seat rails and other parts, all require the use of a servo spot welding platform combined with a fixed spot welding machine. Compared with the robot spot welding system, this fixed spot welding machine servo spot welding platform has the advantages of high efficiency, low cost and good adaptability, so it is widely used under existing technical conditions.

[0003] However, in the process of large-scale application, due to the objective conditions of the single electrode of the fixed spot welding machine, when welding multiple welds, each time the lifting platform moves the spot welding fixture and the product, it needs to be lifted to separate the lower electrode from the product and the fixture before it can be moved to the next weld point for welding.

[0004] When mass production is in progress, the lifting platform is lifted at a high frequency. However, due to the large welding point span of the general spot welding platform, multiple sets of lifting cylinders are used for lifting. In addition, when the upper fixture moves during welding of multiple welding points, the center of gravity will be biased to one side. After long-term use, the upper structure of the platform will become loose, the moving position will be inaccurate, and the quality of the welding points will be poor. Maintenance is required after each production period, otherwise the components of the lifting structure of the servo spot welding platform will be damaged. Summary of the invention

[0005] The present application aims to solve one of the above-mentioned technical problems in the prior art. To this end, an embodiment of the present application provides a lifting platform.

[0006] The embodiment of the present application also provides a spot welding device.

[0007] According to an embodiment of the first aspect of the present application, a lifting platform is provided, comprising a first module, the first module comprising a first platform capable of reciprocating along the X direction; a second module, comprising a second platform, a driving component, a guide component and a synchronization structure, the guide component is used to guide the second platform so that the second platform can move along the Z direction, the driving component is used to drive the second platform to reciprocate along the Z direction, the synchronization structure is used to make the driving force generated by the driving component act synchronously on the second platform, the first module is installed on the second platform; a third module, comprising a third platform capable of reciprocating along the Y direction, the second module is installed on the third platform.

[0008] The above-mentioned lifting platform has at least the following beneficial effects: the present application optimizes the lifting structure of the lifting platform, and the specific main changes are in the second module used to realize the lifting action, and the second platform is realized to run smoothly during the lifting process through the guide component, and the second platform is realized to automatically rise and fall through the drive component. Compared with the prior art, a synchronization structure is added, and the synchronization structure cooperates with the guide structure so that the lifting force generated by the drive component acts synchronously and evenly on the second platform. Even when the first module has a large span, high weight and a changing center of gravity, the second module can still achieve a smooth lift, ensuring the stability of the lifting platform under high-frequency use, improving welding quality, and reducing the risk of equipment damage and maintenance costs.

[0009] According to the lifting platform described in the embodiment of the first aspect of the present application, the driving components are provided in two groups, the two groups of driving components are arranged at intervals, a group of guide components is arranged near each group of driving components, and the synchronization structure is arranged between the two groups of driving components.

[0010] According to the lifting platform described in the embodiment of the first aspect of the present application, the synchronization structure includes a synchronization shaft and a gear structure, the synchronization shaft is configured to be able to rotate around its own central axis, the end of the synchronization shaft is close to the driving assembly, and both ends of the synchronization shaft are connected to the second platform through the gear structure.

[0011] According to the lifting platform described in the embodiment of the first aspect of the present application, the gear structure includes a meshing rack and a gear, the gear is fixed to the synchronization shaft, and the rack is fixed to the second platform.

[0012] According to the lifting platform described in the embodiment of the first aspect of the present application, the driving assembly includes a first cylinder, and the guide assembly includes two guide shafts, and the two guide shafts are respectively located on both sides of the first cylinder.

[0013] According to the lifting platform described in the embodiment of the first aspect of the present application, the driving assembly also includes two second cylinders, and the two second cylinders are respectively arranged on both sides of the end of the synchronization shaft.

[0014] According to the lifting platform described in the embodiment of the first aspect of the present application, the second module also includes a first mounting plate, the synchronization shaft is rotatably set on the first mounting plate through a bearing seat, the synchronization shaft is set along the X direction, the driving assembly is fixed to the first mounting plate, and the first mounting plate is provided with a guide sleeve for sliding connection of the guide shaft.

[0015] According to the lifting platform described in the embodiment of the first aspect of the present application, the first module includes a second mounting plate, a first guide rail slider structure, a first screw rod component and a first motor, the first platform is slidably connected to the second mounting plate through the first guide rail slider structure, the first screw rod component is rotatably set on the second mounting plate, and the first platform is fixedly connected to the screw nut of the first screw rod component, the first motor is fixed to the second mounting plate and connected to the first screw rod component through a coupling.

[0016] According to the lifting platform described in the embodiment of the first aspect of the present application, the third module includes a mounting seat, a second guide rail slider structure, a second screw rod component and a second motor. The third platform is slidably connected to the mounting seat through the second guide rail slider structure, the second screw rod component is rotatably arranged on the mounting seat, and the third platform is fixedly connected to the screw nut of the second screw rod component. The second motor is fixed to the mounting seat and connected to the second screw rod component through a coupling.

[0017] According to an embodiment of the second aspect of the present application, a spot welding device is provided, comprising the lifting platform described above.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application is further described below with reference to the accompanying drawings and embodiments;

[0020] Figure 1 It is a structural schematic diagram of a spot welding device in an embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the structure of the lifting platform in an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the structure of the first module in the embodiment of the present application. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the structure of the first module in the embodiment of the present application. Figure 2 ;

[0024] Figure 5 This is a schematic diagram of the structure of the second module in the embodiment of the present application. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the structure of the second module in the embodiment of the present application. Figure 2 ;

[0026] Figure 7It is a structural diagram of the third module in an embodiment of the present application.

[0027] Figure markings: frame 100, spot welding head 200, lifting platform 300, first module 310, first platform 311, second mounting plate 312, first baffle 3121, first guide rail slider structure 313, first motor 314, first screw rod component 315, second baffle 3151, second module 320, second platform 321, first mounting plate 322, guide shaft 323, first cylinder 324, second cylinder 325, synchronization structure 326, synchronization shaft 3261, gear 3262, rack 3263, third module 330, third platform 331, mounting seat 332, second screw rod component 333, second motor 334. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0032] Reference Figure 1 The present application provides a spot welding device, which includes a lifting platform 300, and the lifting platform 300 is used to switch the welding position of the workpiece during the spot welding process.

[0033] Specifically, the spot welding equipment further includes a frame 100 and a spot welding head 200 . The spot welding head 200 is disposed on the frame 100 through a motion module. The lifting platform 300 is fixed on the frame 100 and is located below the spot welding head 200 .

[0034] Reference Figure 2 The embodiment of the present application further provides a lifting platform 300 , which includes a first module 310 , a second module 320 and a third module 330 .

[0035] The first module 310 includes a first platform 311 capable of reciprocating along the X direction.

[0036] The second module 320 includes a second platform 321, a driving component, a guide component and a synchronization structure 326. The guide component is used to guide the second platform 321 so that the second platform 321 can move along the Z direction. The driving component is used to drive the second platform 321 to reciprocate along the Z direction. The synchronization structure 326 is used to make the driving force generated by the driving component act synchronously on the second platform 321. The first module 310 is installed on the second platform 321.

[0037] The third module 330 includes a third platform 331 capable of reciprocating along the Y direction, and the second module 320 is installed on the third platform 331 .

[0038] When the lifting platform 300 is used for spot welding equipment, the welding tooling for fixing the workpiece is installed on the first platform 311. The position adjustment of the welding tooling along the X direction is achieved through the first module 310, the position adjustment of the welding tooling along the Z direction is achieved through the second module 320, and the position adjustment of the welding tooling along the Y direction is achieved through the third module 330, so as to meet the welding position adjustment requirements of different workpieces.

[0039] The present application optimizes the lifting structure of the lifting platform 300, and the main changes are made in the second module 320 used to realize the lifting action, and the second platform 321 is smoothly operated during the lifting process through the guide component, and the second platform 321 is automatically lifted and lowered through the drive component. Compared with the prior art, a synchronization structure 326 is added, and the synchronization structure 326 cooperates with the guide structure so that the lifting force generated by the drive component is synchronously and evenly applied to the second platform 321. Even when the first module 310 has a large span, high weight, and a changing center of gravity, the second module 320 can still achieve a stable lift, ensuring the stability of the lifting platform 300 under high-frequency use, improving welding quality, and reducing equipment damage risks and maintenance costs.

[0040] In some embodiments, Figure 3 and Figure 4As shown, in order to adapt to the welding operation of workpieces with a long length and more welding positions, the first module 310 is set to have a relatively large span, wherein the first module 310 includes a second mounting plate 312, a first guide rail slider structure 313, a first screw rod component 315 and a first motor 314, the first platform 311 is slidingly connected to the second mounting plate 312 through the first guide rail slider structure 313, the first screw rod component 315 is rotatably set on the second mounting plate 312, and the first platform 311 is fixedly connected to the screw nut of the first screw rod component 315, and the first motor 314 is fixed to the second mounting plate 312 and connected to the first screw rod component 315 through a coupling.

[0041] Specifically, two groups of first guide rail slider structures 313 are provided, and the two groups of first guide rail slider structures 313 are arranged in parallel on the second mounting plate 312, wherein the first guide rail slider structure 313 includes a linear guide rail and a matching slider, the linear guide rail is arranged on the second mounting plate 312, and the first platform 311 is fixed on the slider so that the first platform 311 can slide back and forth along the X direction. The two groups of first guide rail slider structures 313 can make the sliding of the first platform 311 more stable and accurate.

[0042] The first screw rod member 315 is rotatably arranged on the second mounting plate 312 through a screw rod support seat, the input end of the first screw rod member 315 is connected to the first motor 314 fixed to the second mounting plate 312 through a coupling, the screw nut on the first screw rod member 315 is fixedly connected to the first platform 311, and the rotation of the first motor 314 can be converted into a linear reciprocating motion of the first platform 311 through the cooperation of the first screw rod member 315 and the first guide rail slider structure 313. The first motor 314 adopts a servo motor, and the first motor 314 cooperates with the first guide rail slider structure 313 and the first screw rod member 315, so that the movement of the first platform 311 is more precise.

[0043] In some embodiments, in order to prevent welding slag produced during spot welding from falling onto the guide rail or the screw rod, a first baffle 3121 for covering the first guide rail slider structure 313 and a second baffle 3151 for covering the first screw rod component 315 are provided on the second mounting plate 312 .

[0044] In some embodiments, in order to effectively drive the overall lifting of the first platform 311 with a large span, two groups of driving components are provided, and the two groups of driving components are arranged at intervals, and the driving components are close to the end of the second module 320. In order to make the lifting of the first platform 311 more accurate, a group of guide components is arranged near each group of driving components. The guide components play a role in guiding the lifting direction of the first platform 311. In order to further make the upgrade of the first platform 311 more stable, a synchronization structure 326 is arranged between the two groups of driving components. Through the synchronization structure 326, the lifting of various parts of the first platform 311 is synchronized and stable.

[0045] In some specific embodiments, Figure 5 and Figure 6 As shown, the driving assembly includes a first cylinder 324, and the guide assembly includes two guide shafts 323, which are respectively located on both sides of the first cylinder 324. The first cylinder 324 is used to provide the lifting force, and the guide shafts 323 are used to guide the movement direction of the second platform 321.

[0046] Most of the existing structures also adopt this lifting structure. On the one hand, it can make the structural design of the second module 320 more compact. In order to improve the lifting force and solve the problem of large span and heavy weight of the first module 310, the second module 320 will also adopt multiple groups of cylinders for lifting. However, the lifting of multiple groups of cylinders is not synchronized, resulting in force dispersion, which is prone to instability during the lifting process. And because the guide shaft 323 is adopted for guidance, the separated guide shaft 323 is prone to cause jamming, tilting, etc. during the lifting process of the second platform 321, and the long-term and high-frequency tooling state will increase the service life of the drive assembly and the guide assembly. Therefore, the design of multiple groups of cylinders and multiple guide shafts 323 is not a fundamental solution to the problem.

[0047] The newly added synchronization structure 326 can effectively solve the above-mentioned problem. Specifically, in the embodiment of the present application, the synchronization structure 326 includes a synchronization shaft 3261 and a gear structure, the synchronization shaft 3261 is configured to rotate around its own central axis, the end of the synchronization shaft 3261 is close to the driving assembly, and both ends of the synchronization shaft 3261 are connected to the second platform 321 through the gear structure.

[0048] In some specific embodiments, Figure 5 and Figure 6 As shown, the second module 320 also includes a first mounting plate 322, and the synchronization shaft 3261 is rotatably set on the first mounting plate 322 through a bearing seat. The synchronization shaft 3261 is set along the X direction, and the driving assembly is fixed to the first mounting plate 322. Specifically, the first cylinder 324 is distributed at the end of the first mounting plate 322, and a guide sleeve is provided on the first mounting plate 322 for sliding connection of the guide shaft 323.

[0049] A secondary guide correction of the second platform 321 is achieved through a synchronous shaft 3261 and a gear structure. At the same time, during the lifting process, the lifting force generated by the first cylinder 324 is redistributed through the synchronous shaft 3261 and the gear structure. Even if the lifting actions of each cylinder are different, real-time adjustments can be made through the structure to ensure that one end of the second platform 321 will not be higher than the other.

[0050] In some specific embodiments, Figure 6As shown, the gear structure includes a gear rack 3263 and a gear 3262 that are meshed with each other. The gear 3262 is fixed to the synchronization shaft 3261 , and the gear rack 3263 is fixed to the second platform 321 .

[0051] In some embodiments, in order to ensure that the lifting force of the driving components at both ends is sufficient, the driving components also include two second cylinders 325 , which are respectively arranged on both sides of the ends of the synchronization shaft 3261 to assist the first cylinder 324 .

[0052] In this embodiment, the synchronization shaft 3261 is mounted across the middle of the first mounting plate 322 of the second module 320, and both ends of the synchronization shaft 3261 are fixed by bearing seats. Gears 3262 are installed at both ends of the synchronization shaft 3261, and the gears 3262 are meshed with the racks 3263 fixed to the second platform 321. The racks 3263 are fixedly connected to the second platform 321 by the mounting blocks, and can move up and down with the action of the first cylinder 324.

[0053] When the entire second platform 321 is raised or lowered by the action of the first cylinder 324, even if the actions of the multiple first cylinders 324 or the second cylinders 325 are inconsistent, or the movement of the four guide shafts 323 is stuck, after the left and right movable mechanisms are connected by the intermediate gear 3262 rack 3263 mechanism, under the action of the meshing of the rigid gear 3262 rack 3263, the two side mechanisms can only be synchronously lifted or lowered with the gear 3262 rack 3263 rotating synchronously at both ends of the synchronous shaft 3261. After adding the synchronous structure 326, the power of the multiple first cylinders 324 and the second cylinder 325 can be integrated, and the synchronous action can also eliminate the problem of the movement of the multiple guide shafts 323 being stuck, so as to achieve a smooth lifting of the second platform 321.

[0054] In some embodiments, Figure 7 As shown, the third module 330 includes a mounting seat 332, a second guide rail slider structure, a second screw rod component 333 and a second motor 334. The third platform 331 is slidably connected to the mounting seat 332 through the second guide rail slider structure. The second screw rod component 333 is rotatably set on the mounting seat 332, and the third platform 331 is fixedly connected to the screw nut of the second screw rod component 333. The second motor 334 is fixed to the mounting seat 332 and connected to the second screw rod component 333 through a coupling.

[0055] Specifically, two groups of second guide rail slider structures are provided, and the two groups of second guide rail slider structures are arranged in parallel on the mounting seat 332, wherein the second guide rail slider structure includes a linear guide rail and a matching slider, the linear guide rail is arranged on the mounting seat 332, and the third platform 331 is fixed on the slider so that the third platform 331 can slide back and forth along the Y direction. The two groups of second guide rail slider structures can make the sliding of the third platform 331 more stable and accurate.

[0056] The second screw rod member 333 is rotatably arranged on the mounting seat 332 through the screw rod support seat, the input end of the second screw rod member 333 is connected to the second motor 334 fixed to the mounting seat 332 through a coupling, and the screw nut on the second screw rod member 333 is fixedly connected to the third platform 331. Through the cooperation of the second screw rod member 333 and the second guide rail slider structure, the rotation of the second motor 334 can be converted into a linear reciprocating motion of the third platform 331. The second motor 334 adopts a servo motor, and the second motor 334 cooperates with the second guide rail slider structure and the second screw rod member 333, so that the movement of the third platform 331 is more precise.

[0057] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A lifting platform, characterized in that: include A first module, the first module comprising a first platform capable of reciprocating along the X direction; The second module comprises a second platform, a driving component, a guide component and a synchronization structure, wherein the guide component is used for guiding the second platform so that the second platform can move along the Z direction, the driving component is used for driving the second platform to reciprocate along the Z direction, the synchronization structure is used for making the driving force generated by the driving component act synchronously on the second platform, and the first module is installed on the second platform; The third module comprises a third platform capable of reciprocating along the Y direction, and the second module is installed on the third platform.

2. The lifting platform according to claim 1, characterized in that: There are two groups of driving components in total, and the two groups of driving components are arranged at intervals. A group of guiding components is arranged near each group of driving components, and the synchronization structure is arranged between the two groups of driving components.

3. The lifting platform according to claim 2, characterized in that: The synchronization structure includes a synchronization shaft and a gear structure. The synchronization shaft is configured to rotate around its own central axis. The end of the synchronization shaft is close to the driving assembly. Both ends of the synchronization shaft are connected to the second platform through the gear structure.

4. The lifting platform according to claim 3, characterized in that: The gear structure includes a meshing rack and a gear, the gear is fixed to the synchronization shaft, and the rack is fixed to the second platform.

5. The lifting platform according to claim 2, characterized in that: The driving assembly includes a first cylinder, and the guiding assembly includes two guiding shafts, which are respectively located on both sides of the first cylinder.

6. The lifting platform according to claim 5, characterized in that: The driving assembly further includes two second cylinders, which are respectively arranged on both sides of the end of the synchronization shaft.

7. The lifting platform according to claim 5, characterized in that: The second module also includes a first mounting plate, the synchronization shaft is rotatably arranged on the first mounting plate through a bearing seat, the synchronization shaft is arranged along the X direction, the driving assembly is fixed to the first mounting plate, and a guide sleeve for sliding connection of the guide shaft is arranged on the first mounting plate.

8. The lifting platform according to claim 1, characterized in that: The first module includes a second mounting plate, a first guide rail slider structure, a first screw rod component and a first motor. The first platform is slidably connected to the second mounting plate through the first guide rail slider structure. The first screw rod component is rotatably set on the second mounting plate, and the first platform is fixedly connected to the screw nut of the first screw rod component. The first motor is fixed to the second mounting plate and connected to the first screw rod component through a coupling.

9. The lifting platform according to claim 1, characterized in that: The third module includes a mounting seat, a second guide rail slider structure, a second screw rod component and a second motor. The third platform is slidably connected to the mounting seat through the second guide rail slider structure. The second screw rod component is rotatably set on the mounting seat, and the third platform is fixedly connected to the screw nut of the second screw rod component. The second motor is fixed to the mounting seat and connected to the second screw rod component through a coupling.

10. A spot welding device, characterized in that: A lifting platform comprising any one of claims 1 to 9.

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