Positioner and welding system

Abstract

The utility model provides a kind of positioner and welding system, it is related to welding technical field.First installation component includes first fixed frame and first lifting mechanism, first lifting mechanism is slidably connected with first fixed frame, to make first lifting mechanism can move along first direction, second installation component includes second fixed frame and second lifting mechanism, second lifting mechanism is slidably connected with second fixed frame, to make second lifting mechanism can move along first direction, first lifting mechanism and second lifting mechanism are respectively used to be connected with the both ends of workpiece in second direction, first fixed frame and second fixed frame are spaced arrangement along second direction, moving drive component can drive at least one of first fixed frame and second fixed frame along second direction, to make first fixed frame and second fixed frame in second direction close to each other or away from each other.The utility model can solve the problem that positioner cannot adapt to workpiece of different sizes and workpiece installation is more inconvenient.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a positioner and welding system. Background Technology

[0002] With the development of robotics technology, welding robots are increasingly widely used in workpiece welding. When a welding robot welds a workpiece, a positioner is generally needed to fix the workpiece in place. Specifically, a positioner typically includes a headstock and a tailstock, which are connected to both ends of the workpiece to fix it in place.

[0003] However, the positions of the headstock and tailstock are fixed, and the positioner cannot adapt to workpieces of different sizes. Furthermore, to meet the welding requirements of welding robots, the headstock and tailstock generally need to fix the workpiece at a relatively high position, making it inconvenient for operators to install the workpiece onto them. Utility Model Content

[0004] In view of this, this application provides a positioner and welding system to solve, to some extent, the problems that the positioner cannot adapt to workpieces of different sizes and that workpiece installation is inconvenient.

[0005] According to one aspect of this application, a positioner is provided for fixing a workpiece. The positioner includes a first mounting assembly, a second mounting assembly, and a movement drive assembly. The first mounting assembly includes a first fixing frame and a first lifting mechanism. The first lifting mechanism is slidably connected to the first fixing frame so that the first lifting mechanism can move along a first direction. The second mounting assembly includes a second fixing frame and a second lifting mechanism. The second lifting mechanism is slidably connected to the second fixing frame so that the second lifting mechanism can move along the first direction. The first lifting mechanism and the second lifting mechanism are respectively used to connect to both ends of the workpiece in a second direction, where the second direction intersects the first direction. The first and second fixed frames are arranged at intervals along the second direction, and the motion drive assembly is capable of driving at least one of the first and second fixed frames to move along the second direction, so that the first and second fixed frames move closer to or further away from each other in the second direction.

[0006] Preferably, the moving drive assembly includes a first rotary drive member, a mounting bracket, a gear, and a rack. The rack is fixed to the mounting bracket and extends along the second direction. The first rotary drive member is disposed on the second fixed bracket and is connected to the gear to drive the gear to rotate. The gear meshes with the rack.

[0007] Preferably, the moving drive assembly further includes a guide rail and a slider, the guide rail being fixed on the mounting bracket and extending along the second direction, and the slider being disposed on the guide rail and connected to the second mounting bracket.

[0008] Preferably, the first lifting mechanism includes a first lifting drive component, a first mounting plate, and a first clamp. The first lifting drive component is fixed on the first fixed frame and connected to the first mounting plate to drive the first mounting plate to move along the first direction. The first clamp is connected to the first mounting plate and is used to clamp the workpiece.

[0009] Preferably, the second lifting mechanism includes a second lifting drive, a second mounting plate, and a second clamp. The second lifting drive is fixed on the second fixed frame and connected to the second mounting plate to drive the second mounting plate to move along the first direction. The second clamp is connected to the second mounting plate and is used to clamp the workpiece.

[0010] Preferably, the first lifting mechanism further includes a first slewing bearing, which is disposed on the first mounting plate, and the first clamp is connected to the first slewing bearing; the second lifting mechanism further includes a second slewing bearing, which is disposed on the second mounting plate, and the second clamp is connected to the second slewing bearing. The positioner further includes a meshing member and a second rotary drive member, the second rotary drive member being connected to the meshing member to drive the meshing member to rotate, and one of the first slewing bearing and the second slewing bearing meshing with the meshing member.

[0011] Preferably, the second rotary drive component is fixed to the first mounting plate; The second mounting assembly further includes a telescopic mechanism disposed on the second mounting plate. The second clamp has a positioning hole, and the telescopic mechanism is capable of telescoping along the second direction so that a portion of the telescopic mechanism can enter into or exit from the positioning hole.

[0012] Preferably, the first lifting mechanism further includes a first lead screw and a first nut, the first lifting drive component is connected to the first lead screw to drive the first lead screw to rotate, the first nut is disposed on the first lead screw and is connected to the first mounting plate; The second lifting mechanism further includes a second lead screw and a second nut. The second lifting drive is connected to the second lead screw to drive the second lead screw to rotate. The second nut is disposed on the second lead screw and is connected to the second mounting plate.

[0013] Preferably, the first lead screw and the first nut are located inside the first fixing frame, and the second lead screw and the second nut are located inside the second fixing frame; The first mounting assembly further includes a first bellows cover and a second bellows cover. One end of the first bellows cover is fixed to the first mounting bracket, and the other end of the first bellows cover is connected to the first end of the first mounting plate in the first direction. One end of the second bellows cover is fixed to the first mounting bracket, and the other end of the second bellows cover is connected to the second end of the first mounting plate in the first direction. The first bellows cover and the second bellows cover can extend or retract along the first direction. And / or, the second mounting assembly further includes a third accordion cover and a fourth accordion cover, one end of the third accordion cover being fixed to the second mounting bracket, the other end of the third accordion cover being connected to a first end of the second mounting plate in the first direction, one end of the fourth accordion cover being fixed to the second mounting bracket, the other end of the fourth accordion cover being connected to a second end of the second mounting plate in the first direction, and the third accordion cover and the fourth accordion cover being capable of extending or retracting along the first direction.

[0014] According to another aspect of this application, a welding system is provided, the welding system including the positioner described above.

[0015] In the positioner of this application, a first fixed frame and a second fixed frame are arranged at intervals along a second direction. A first lifting mechanism and a second lifting mechanism are respectively used to connect to both ends of the workpiece in the second direction. A motion drive assembly can drive at least one of the first fixed frame and the second fixed frame to move along the second direction, so that the first fixed frame and the second fixed frame move closer to each other or further apart in the second direction. In this way, the distance between the first fixed frame and the second fixed frame can be adjusted based on the size of the workpiece in the second direction to meet the fixing requirements of workpieces of different sizes. When the positioner is in use, the first direction is parallel to the direction of gravity, and the first lifting mechanism and the second lifting mechanism can move along the first direction. When the workpiece is installed, the first lifting mechanism and the second lifting mechanism can move downward so that the operator can install the workpiece at a lower height. After installation, the first lifting mechanism and the second lifting mechanism move upward so that the height of the workpiece increases to meet the welding requirements of the welding robot. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram showing the three-dimensional structure of the positioner; Figure 2 A three-dimensional structural schematic diagram of the first mounting component is shown from one perspective; Figure 3 A three-dimensional structural diagram of the first mounting component is shown from another perspective; Figure 4 A three-dimensional structural diagram of the second mounting component is shown; Figure 5 A view showing the relative positions of the second mounting component and the moving drive component; Figure 6 This diagram shows the relative positions of the second mounting component and the moving drive component from another perspective. Figure 7 Show Figure 6 Enlarged view of section A.

[0018] Icons: 100-First mounting assembly; 110-First fixing bracket; 120-First lifting mechanism; 121-First lifting drive component; 122-First mounting plate; 123-First lead screw; 124-First nut; 125-First worm gear reducer; 126-First moving block; 127-First slide rail; 128-First slewing bearing; 129-Second rotary drive component; 130-Support frame; 140-First support leg; 150-First bellows cover; 160-Second bellows cover; 170-Cover; 180-First mercury slip ring; 200-Second mounting assembly; 210-Second fixing bracket; 220-Second lifting mechanism; 22 1-Second lifting drive component; 222-Second mounting plate; 223-Second worm gear reducer; 224-Second slide rail; 225-Second slewing bearing; 230-Third bellows cover; 240-Fourth bellows cover; 250-Limit switch; 260-Telescopic mechanism; 270-Second mercury slip ring; 300-Moving drive assembly; 310-Fixing block; 320-First rotary drive component; 330-Mounting bracket; 340-Gear; 350-Rack; 360-Guide rail; 370-Slider; 380-Second support leg; 390-Planetary reducer; 400-Drag chain; L1-First direction; L2-Second direction; L3-Third direction. Detailed Implementation

[0019] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] The following will combine Figures 1 to 7 Describe the positioner, in Figures 1 to 7 In the diagram, the first direction L1 intersects with the second direction L2, and the third direction L3 intersects with the plane determined by the first direction L1 and the second direction L2. The intersection is preferably perpendicular. The positioner will be described below in combination with the case where the first direction L1, the second direction L2 and the third direction L3 are perpendicular to each other.

[0029] According to one aspect of this application, a positioner is provided for fixing a workpiece, such as... Figures 1 to 7As shown, the positioner includes a first mounting assembly 100, a second mounting assembly 200, and a movement drive assembly 300. The first mounting assembly 100 includes a first fixed frame 110 and a first lifting mechanism 120, which is slidably connected to the first fixed frame 110 so that the first lifting mechanism 120 can move along a first direction L1. The second mounting assembly 200 includes a second fixed frame 210 and a second lifting mechanism 220, which is slidably connected to the second fixed frame 210 so that the second lifting mechanism 220 can move along the first direction L1. The first lifting mechanism 120 and the second lifting mechanism 220 are respectively used to connect to the two ends of the workpiece in a second direction L2, where the second direction L2 intersects the first direction L1. The first fixed frame 110 and the second fixed frame 210 are arranged at intervals along the second direction L2. The movement drive assembly 300 can drive at least one of the first fixed frame 110 and the second fixed frame 210 to move along the second direction L2 so that the first fixed frame 110 and the second fixed frame 210 move closer to or further away from each other in the second direction L2.

[0030] When the positioner of this application is used, the distance between the first fixing frame 110 and the second fixing frame 210 can be adjusted based on the size of the workpiece in the second direction L2 to meet the fixing requirements of workpieces of different sizes. When the positioner is used, the first direction L1 is parallel to the direction of gravity. During workpiece installation, the first lifting mechanism 120 and the second lifting mechanism 220 can move downward along the first direction L1 so that the operator can install the workpiece at a lower height. After installation, the first lifting mechanism 120 and the second lifting mechanism 220 move upward along the first direction L1, so that the height of the workpiece increases to meet the welding requirements of the welding robot.

[0031] In the embodiments of this application, such as Figure 2 and Figure 3 As shown, the first mounting assembly 100 also includes a support frame 130, with a first support leg 140 provided on one side of the support frame 130, and a first fixing frame 110 fixed to the support frame 130. The first lifting mechanism 120 includes a first lifting drive component 121, a first mounting plate 122, and a first clamp ( Figure 2 and Figure 3 (Not shown in the image) The first lifting drive 121 is fixed on the first fixed frame 110. The first lifting drive 121 can drive the first mounting plate 122 to move along the first direction L1. The first clamp is connected to the first mounting plate 122 and is used to clamp the workpiece. In this way, the first lifting drive 121 can drive the first clamp to move along the first direction L1, thereby driving the workpiece to move along the first direction L1.

[0032] Furthermore, the first lifting mechanism 120 includes a first lead screw 123 and a first nut 124, which are located within the first fixed frame 110. The first lead screw 123 is connected to the first lifting drive member 121, and the first nut 124 is disposed on the first lead screw 123 and connected to the first mounting plate 122. When the first lead screw 123 rotates, the first nut 124 moves along the first lead screw 123, thereby causing the first mounting plate 122 to extend in a first direction L1, and further causing the first clamp to move in the first direction L1.

[0033] Optionally, the first lifting drive component 121 can be a servo motor. The first lifting drive component 121 is connected to the first lead screw 123 via a first worm gear reducer 125 to drive the first lead screw 123 to rotate. The first lifting drive component 121 and the first worm gear reducer 125 can both be fixed to the outside of the first fixed frame 110.

[0034] like Figure 2 and Figure 3 As shown, the first lifting mechanism 120 also includes a first moving block 126 and a first slide rail 127. The first slide rail 127 is fixed on the first fixed frame 110 and extends along a first direction L1. The first moving block 126 is disposed on the first slide rail 127 and connected to the first mounting plate 122. When the first nut 124 moves along the first lead screw 123, the first moving block 126 moves along the first slide rail 127, thereby guiding the movement of the first mounting plate 122.

[0035] In addition, the first mounting assembly 100 also includes a first accordion cover 150 and a second accordion cover 160. The upper end of the first accordion cover 150 is fixed to the top of the first mounting bracket 110, and the lower end of the first accordion cover 150 is connected to the upper end of the first mounting plate 122 (for ease of showing the first slide rail 127, ...). Figure 2 The diagram shows the first bellows cover 150 not connected to the first mounting plate 122. In the positioner body, the lower end of the first bellows cover 150 is connected to the upper end of the first mounting plate 122. The lower end of the second bellows cover 160 is connected to the lower end of the first mounting bracket 110, and the upper end of the second bellows cover 160 is connected to the upper end of the first mounting plate 122. The first bellows cover 150 and the second bellows cover 160 can extend or retract along the first direction L1. In this way, the first mounting plate 122, the first bellows cover 150, and the second bellows cover 160 cooperate to reduce dust entering the interior of the first mounting bracket 110.

[0036] In addition, the first lifting mechanism 120 also includes a first slewing bearing 128. The inner ring of the first slewing bearing 128 is fixed to the first mounting plate 122. The first clamp is connected to the outer ring of the first slewing bearing 128, which allows the first clamp to rotate relative to the first mounting plate 122, thereby driving the workpiece to rotate. The positioner also includes a cover 170, a meshing member (the meshing member is located inside the cover 170, not shown in the figure), and a second rotary drive 129. The second rotary drive 129 is fixed to the first mounting plate 122 and is connected to the meshing member to drive the meshing member to rotate. The cover 170 covers the meshing member. The outer ring of the first slewing bearing 128 forms a ring of teeth, which meshes with the meshing member. When the second rotary drive 129 drives the meshing member to rotate, the outer ring of the first slewing bearing 128 rotates, thereby driving the first clamp and the workpiece to rotate.

[0037] Optionally, the meshing element is a gear.

[0038] Optionally, the first fixture can be a clamping structure with a cylinder, the specific form of which can be selected based on the form of the workpiece. For example, the first fixture can have a support plate, a support block, and a clamping cylinder. The support plate is bolted to the outer ring of the first slewing bearing 128. The support block and the clamping cylinder are both fixed to the support plate. The workpiece is supported on the support block. By extending and retracting the clamping cylinder, the clamping cylinder comes into contact with the workpiece. The cooperation between the support block and the clamping cylinder achieves workpiece clamping. In addition, a first mercury slip ring 180 can be provided on the first mounting plate 122. The wires in the first fixture used to connect to the clamping cylinder are connected to the first mercury slip ring 180 to prevent damage to the wires during the rotation of the first fixture.

[0039] Optionally, both the first mounting component 100 and the second mounting component 200 may be able to move along the second direction L2, or only the first mounting component 100 or only the second mounting component 200 may be able to move along the second direction L2.

[0040] Preferably, only the second mounting component 200 is movable along the second direction L2. In this case, as... Figure 5 , Figure 6 and Figure 7As shown, the moving drive assembly 300 includes a fixed block 310, a first rotary drive member 320, a mounting bracket 330, a gear 340, and a rack 350. A second support leg 380 is provided below the mounting bracket 330 to support it. The fixed block 310 can be fixed to the mounting bracket 330 with bolts, and the rack 350 can be fixed to the fixed block 310 with bolts. The rack 350 extends along a second direction L2. The first rotary drive member 320 is mounted on the second fixed bracket 210 and connected to the gear 340, which meshes with the rack 350. Thus, by driving the gear 340 to rotate via the first rotary drive member 320, the gear 340 can move along the rack 350, thereby causing the second fixed bracket 210 to move along the second direction L2.

[0041] Optionally, the first rotary drive 320 is a servo motor, and the first rotary drive 320 is connected to the gear 340 through a planetary reducer 390.

[0042] Furthermore, the motion drive assembly 300 also includes a guide rail 360 and a slider 370. The guide rail 360 is fixed to the mounting bracket 330 and extends along the second direction L2. The slider 370 is disposed on the guide rail 360 and connected to the second fixed bracket 210. When the gear 340 moves along the rack 350, the slider 370 moves along the guide rail 360. The guide rail 360 can guide the movement of the slider 370, thereby guiding the movement of the second fixed bracket 210, thus improving the stability of the movement of the second fixed bracket 210.

[0043] Preferably, there are two guide rails 360, which are arranged at intervals along the third direction L3, and each guide rail 360 is provided with at least one slider 370.

[0044] In the embodiments of this application, such as Figure 4 and Figure 5 As shown, the second lifting mechanism 220 includes a second lifting drive component 221, a second mounting plate 222, and a second clamp ( Figure 4 and Figure 5 (Not shown in the image) The second lifting drive 221 is fixed on the second fixed frame 210. The second lifting drive 221 can drive the second mounting plate 222 to move along the first direction L1. The second clamp is connected to the second mounting plate 222 and is used to clamp the workpiece. In this way, the second lifting drive 221 can drive the second clamp to move along the first direction L1, thereby driving the workpiece to move along the first direction L1.

[0045] Furthermore, the second lifting mechanism 220 includes a second lead screw and a second nut (located inside the second fixed frame 210). Figure 4 and Figure 5(Not shown in the image), the second lead screw and the second nut are located within the second fixed frame 210. The second lead screw is connected to the second lifting drive component 221, and the second nut is mounted on the second lead screw and connected to the second mounting plate 222. When the second lead screw rotates, the second nut moves along the second lead screw, thereby driving the second mounting plate 222 to move along the first direction L1, and further driving the second clamp to move along the first direction L1.

[0046] Optionally, the second lifting drive component 221 can be a servo motor. The second lifting drive component 221 is connected to the second lead screw via a second worm gear reducer 223 to drive the second lead screw to rotate. Both the second lifting drive component 221 and the second worm gear reducer 223 can be fixed to the outside of the second fixed frame 210.

[0047] In addition, the second lifting mechanism 220 also includes a second moving block and a second slide rail 224. The second slide rail 224 is fixed on the second fixed frame 210 and extends along the first direction L1. The second moving block is disposed on the second slide rail 224 and connected to the second mounting plate 222. When the second nut moves along the second lead screw, the second moving block moves along the second slide rail 224, thereby guiding the movement of the second mounting plate 222.

[0048] In addition, the second mounting assembly 200 also includes a third accordion cover 230 and a fourth accordion cover 240. The upper end of the third accordion cover 230 is fixed to the top of the second mounting bracket 210, and the lower end of the third accordion cover 230 is connected to the upper end of the second mounting plate 222 (for ease of showing the second slide rail 224, Figure 4 The diagram shows the third bellows cover 230 not connected to the second mounting plate 222 (in the positioner body, the lower end of the third bellows cover 230 is connected to the upper end of the second mounting plate 222). The lower end of the fourth bellows cover 240 is connected to the lower end of the second mounting bracket 210, and the upper end of the fourth bellows cover 240 is connected to the upper end of the second mounting plate 222. The third bellows cover 230 and the fourth bellows cover 240 can extend or retract along the first direction L1. Thus, the second mounting plate 222, the third bellows cover 230, and the fourth bellows cover 240 cooperate to reduce dust entering the interior of the second mounting bracket 210.

[0049] like Figure 5 As shown, the second lifting mechanism 220 also includes a second slewing bearing 225 and a carbon brush assembly (located on the side of the second mounting plate 222 opposite to the second slewing bearing 225). Figure 5(Not shown in the image) The inner ring of the second slewing bearing 225 is fixed to the second mounting plate 222, and the second clamp is connected to the outer ring of the second slewing bearing 225. This allows the second clamp to rotate relative to the second mounting plate 222, thereby causing the workpiece to rotate. The carbon brush assembly is fixed to the second mounting plate 222 and abuts against the outer ring of the second slewing bearing 225. Since the first slewing bearing 128 is correspondingly provided with a second rotary drive member 129 that drives the outer ring of the first slewing bearing 128 to rotate, when the second rotary drive member 129 drives the outer ring of the first slewing bearing 128 to rotate, the first clamp and the workpiece rotate accordingly, and the outer ring of the second slewing bearing 225 and the second clamp also rotate accordingly. In this way, the first slewing bearing 128 and the second slewing bearing 225 cooperate to enable the workpiece to rotate continuously 360° to meet the welding requirements of the welding robot's welding torch in different postures.

[0050] Optionally, the second mounting assembly 200 further includes a telescopic mechanism 260, which is disposed on the second mounting plate 222. The second clamp has a positioning hole, and the telescopic mechanism 260 can extend and retract along a second direction L2, allowing a portion of the telescopic mechanism 260 to enter or exit the positioning hole. During workpiece mounting, the telescopic mechanism 260 extends, allowing a portion of the telescopic mechanism 260 to enter the positioning hole, thereby positioning the second clamp. After workpiece mounting is completed, the telescopic mechanism 260 retracts, at which point the second clamp can rotate to meet the rotation requirements of the workpiece.

[0051] Optionally, the second clamp can be a clamping structure with a cylinder, the specific form of which can be selected based on the form of the workpiece. For example, the second clamp can have a support plate, a support block, and a clamping cylinder. The support plate is bolted to the outer ring of the second slewing bearing 225. The support block and the clamping cylinder are both fixed on the support plate. The workpiece is supported on the support block. By extending and retracting the clamping cylinder, the clamping cylinder comes into contact with the workpiece. The cooperation between the support block and the clamping cylinder can fix the workpiece. The support plate of the second clamp can be provided with the aforementioned positioning holes so that the telescopic mechanism 260 can limit the second clamp. In addition, a second mercury slip ring 270 can be provided on the second mounting plate 222. The wires in the second clamp used to connect to the clamping cylinder are connected to the second mercury slip ring 270 to prevent damage to the wires during the rotation of the second clamp.

[0052] It should be noted that the engaging member and the second rotary drive member 129 can also be set on the second mounting plate 222. In this case, the engaging member can drive the second clamp to rotate, and the first mounting plate 122 does not need to be set with the engaging member and the second rotary drive member 129.

[0053] In addition, cable carriers 400 are provided on the first mounting bracket 110 and the second mounting bracket 210 to protect the cables for safe routing. Protective covers are provided on the first lifting drive 121, the second lifting drive 221, the first rotary drive 320, and the second rotary drive 129 to protect them. A limit switch 250 is also provided on the second mounting bracket 210, which can abut against the second mounting plate 222 to detect the position of the second mounting plate 222.

[0054] Optionally, the first slewing bearing 128 and the second slewing bearing 225 described above can be replaced with a harmonic reducer or a crossed roller bearing, in which case the rotation of the workpiece can also be achieved.

[0055] According to another aspect of this application, a welding system is provided, which includes the aforementioned positioner and has the same technical effects as the aforementioned positioner, which will not be described in detail here.

[0056] Optionally, the welding system also includes a welding robot, which is positioned on one side of the positioner and can move along a second direction L2 to weld different positions on the workpiece.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positioner for fixing a workpiece, characterized in that, The positioner includes a first mounting assembly, a second mounting assembly, and a movement drive assembly. The first mounting assembly includes a first fixed frame and a first lifting mechanism. The first lifting mechanism is slidably connected to the first fixed frame so that the first lifting mechanism can move along a first direction. The second mounting assembly includes a second fixed frame and a second lifting mechanism. The second lifting mechanism is slidably connected to the second fixed frame so that the second lifting mechanism can move along the first direction. The first lifting mechanism and the second lifting mechanism are respectively used to connect to both ends of the workpiece in a second direction, and the second direction intersects the first direction. The first and second fixed frames are arranged at intervals along the second direction, and the motion drive assembly is capable of driving at least one of the first and second fixed frames to move along the second direction, so that the first and second fixed frames move closer to or further away from each other in the second direction.

2. The positioner according to claim 1, characterized in that, The moving drive assembly includes a first rotary drive component, a mounting bracket, a gear, and a rack. The rack is fixed to the mounting bracket and extends along the second direction. The first rotary drive component is disposed on the second fixed bracket and is connected to the gear to drive the gear to rotate. The gear meshes with the rack.

3. The positioner according to claim 2, characterized in that, The moving drive assembly also includes a guide rail and a slider. The guide rail is fixed on the mounting bracket and extends along the second direction. The slider is disposed on the guide rail and connected to the second mounting bracket.

4. The positioner according to claim 1, characterized in that, The first lifting mechanism includes a first lifting drive component, a first mounting plate, and a first clamp. The first lifting drive component is fixed on the first fixed frame and connected to the first mounting plate to drive the first mounting plate to move along the first direction. The first clamp is connected to the first mounting plate and is used to clamp the workpiece.

5. The positioner according to claim 4, characterized in that, The second lifting mechanism includes a second lifting drive component, a second mounting plate, and a second clamp. The second lifting drive component is fixed on the second fixed frame and connected to the second mounting plate to drive the second mounting plate to move along the first direction. The second clamp is connected to the second mounting plate and is used to clamp the workpiece.

6. The positioner according to claim 5, characterized in that, The first lifting mechanism further includes a first slewing bearing, which is disposed on the first mounting plate, and the first clamp is connected to the first slewing bearing. The second lifting mechanism further includes a second slewing bearing, which is disposed on the second mounting plate, and the second clamp is connected to the second slewing bearing. The positioner further includes a meshing member and a second rotary drive member, the second rotary drive member being connected to the meshing member to drive the meshing member to rotate, and one of the first slewing bearing and the second slewing bearing meshing with the meshing member.

7. The positioner according to claim 6, characterized in that, The second rotary drive component is fixed to the first mounting plate; The second mounting assembly further includes a telescopic mechanism disposed on the second mounting plate. The second clamp has a positioning hole, and the telescopic mechanism is capable of telescoping along the second direction so that a portion of the telescopic mechanism can enter into or exit from the positioning hole.

8. The positioner according to claim 5, characterized in that, The first lifting mechanism further includes a first lead screw and a first nut. The first lifting drive is connected to the first lead screw to drive the first lead screw to rotate. The first nut is disposed on the first lead screw and is connected to the first mounting plate. The second lifting mechanism further includes a second lead screw and a second nut. The second lifting drive is connected to the second lead screw to drive the second lead screw to rotate. The second nut is disposed on the second lead screw and is connected to the second mounting plate.

9. The positioner according to claim 8, characterized in that, The first lead screw and the first nut are located inside the first fixed frame, and the second lead screw and the second nut are located inside the second fixed frame; The first mounting assembly further includes a first bellows cover and a second bellows cover. One end of the first bellows cover is fixed to the first mounting bracket, and the other end of the first bellows cover is connected to the first end of the first mounting plate in the first direction. One end of the second bellows cover is fixed to the first mounting bracket, and the other end of the second bellows cover is connected to the second end of the first mounting plate in the first direction. The first bellows cover and the second bellows cover can extend or retract along the first direction. And / or, the second mounting assembly further includes a third accordion cover and a fourth accordion cover, one end of the third accordion cover being fixed to the second mounting bracket, the other end of the third accordion cover being connected to a first end of the second mounting plate in the first direction, one end of the fourth accordion cover being fixed to the second mounting bracket, the other end of the fourth accordion cover being connected to a second end of the second mounting plate in the first direction, and the third accordion cover and the fourth accordion cover being capable of extending or retracting along the first direction.

10. A welding system, characterized in that, The welding system includes the positioner as described in any one of claims 1-9.

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