Positioning tool for sofa chair motor driving pipe frame welding

Abstract

The invention discloses a positioning tool for sofa chair motor driving pipe frame welding, and relates to the technical field of sofa chair motor driving pipe frame machining. The device comprises a base, a mounting bottom plate, a driving plate automatic positioning mechanism, a driving pipe automatic positioning mechanism and an automatic hinge seat positioning mechanism, the driving plate automatic positioning mechanism comprises a driving plate conveying unit and a driving plate positioning unit; driving pipe automatic positioning mechanisms are arranged between the two driving plate automatic positioning mechanisms on the base, and two groups of driving pipe automatic positioning mechanisms are symmetrically arranged on the mounting bottom plate front and back; the automatic hinge seat positioning mechanism comprises a correction conveying belt unit and a hinge seat clamping, lifting and positioning unit. The driving plate is fixed through the mold plate so that the driving plate can be conveyed to be positioned and welded, the driving pipe and the hinge base are sequentially conveyed to a fixed point position to be fixed, automatic welding is completed, and the problems that existing fixing needs manual fixing, and the welding efficiency is low are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sofa chair motor drive pipe frame processing, in particular to a positioning tool for welding a sofa chair motor drive pipe frame. Background Art

[0002] With technological advancements and rising living standards, electric furniture, such as electric sofa chairs, is increasingly becoming part of everyday life. Existing electric sofa chairs use a motor-driven tube frame to retract or extend the sofa, allowing the chair to form different configurations and accommodate different sitting and lying postures. The sofa chair's telescopic structure consists of a drive tube frame and an expansion frame. The drive tube frame is connected to the expansion frame, and an electric push rod is connected to the drive tube frame. Pushing the drive tube frame drives the entire expansion frame to extend or retract.

[0003] In the prior art, a drive tube rack is generally formed by two drive plates connected to a telescopic frame, two drive tubes fixed between the two drive plates, and an articulated seat fixed on the drive tubes to connect to a power supply. Most of the connections between the drive plates, the drive tubes, and the articulated seat are fixed by welding, that is, the drive plates are fixed by a device, and the operator holds the drive tubes and the articulated seat to perform welding. This welding method has the problems of low efficiency, low precision, and troublesome welding, and there is room for improvement. Currently, a robotic arm is used to control laser welding, but the fixed positioning formed by the drive plates, the two drive tubes fixed between the two drive plates, and the articulated seat fixed on the drive tubes to connect to the power supply is still fixed on the positioning device by human operation. After each welding is completed, it needs to be manually removed and a new set fixed, which is cumbersome to operate and cannot be performed continuously. During welding, workers cannot get too close and have to wait until the welding is completed before they can move close to assemble to prevent sparks from splashing on the workers. Summary of the Invention

[0004] The purpose of the present invention is to provide a positioning tool for welding a motor drive pipe frame of a sofa chair. The driving plate is fixed by a mold plate so that it can be transported for positioning welding. The driving pipe and the hinge seat are successively sent to fixed positions for fixing, thereby completing automatic welding, thereby solving the problems of existing fixation requiring manual fixation and low welding efficiency.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: a positioning tool for welding a motor-driven pipe frame of a sofa chair, comprising a base, a mounting base, an automatic positioning mechanism for a driving plate, an automatic positioning mechanism for a driving pipe, and an automatic positioning mechanism for a hinged seat;

[0006] The upper surface of the base is symmetrically provided with mounting base plates near the left and right sides, and the two mounting base plates are symmetrically provided with driving plate automatic positioning mechanisms, and the driving plate automatic positioning mechanisms include a driving plate conveying unit and a driving plate positioning unit, which fix the driving plate on the mold plate, and the stacked mold plates are placed in the driving plate conveying unit, and the mold plates are sent from the driving plate conveying unit to the driving plate positioning unit for fixing;

[0007] A drive tube automatic positioning mechanism is provided on the base between the two drive plate automatic positioning mechanisms. Two groups of the drive tube automatic positioning mechanisms are symmetrically arranged front and back on the mounting base. The drive tube automatic positioning mechanism includes a drive tube conveyor belt and a fixed height lifting and fixing unit. The two groups of the drive tube automatic positioning mechanisms respectively raise one drive tube to a fixed height position, and the two drive plate positioning units respectively push the drive plate on the mold plate therein to the middle position to dock and position it with the two drive tubes.

[0008] The automatic articulated seat positioning mechanism is arranged at the position of the group of driving plate automatic positioning mechanisms on the front side of the base, and the automatic articulated seat positioning mechanism includes a correction conveyor belt unit and an articulated seat clamping and lifting positioning unit.

[0009] The present invention is further configured as follows: the driving plate transport unit includes a mold conveying frame, a mold pushing assembly and a mold side pushing assembly, the mold conveying frame is a U-shaped conveying frame, four protruding slide rails are symmetrically provided on the two inner side walls of the mold conveying frame, four slide grooves matching the protruding slide rails are symmetrically provided on both sides of the mold plate, a mold pushing assembly is provided at the middle position of the bottom inner portion of the mold conveying frame, a square opening that is sleeved outside the mold pushing assembly is provided at the middle position of the thickened section of the lower half of the mold plate, the top of the square opening is placed on the mold pushing assembly, the mold conveying frame is a blocking edge at the output end, the mold conveying frame is provided with an output opening on one side of the output end facing the driving plate positioning unit, the mold conveying frame is provided with a mold side pushing assembly and a side pushing cylinder and a side pushing plate installed on the side pushing cylinder on the side of the output end opposite to the output opening;

[0010] The driving plate positioning unit includes a clamping block, a first limit plate and a second limit plate, two first limit slide bars are provided between the first limit plate and the second limit plate, the bottom of the clamping block is movably sleeved on the two first limit slide bars, the second limit plate is provided with a forward pushing cylinder, the clamping block is provided with a positioning clamping port facing the output opening, and a positioning cylinder group and an extrusion fixing cylinder group are installed on the rear side wall of the clamping block.

[0011] The present invention is further configured such that the mold pushing assembly includes a push belt groove and a push belt, rollers are provided at both ends of the push belt groove, a push belt is sleeved on the two rollers, and protruding semicircular protrusions are evenly distributed on the surface of the push belt, and a support plate is provided under the upper belt of the push belt.

[0012] The present invention is further configured such that the upper half of the mold plate is thinned to form a positioning plate, the thickness of the lower half of the mold plate is 3-5 cm, and the widths of the output opening and the positioning clamping opening are equal and 10-15% greater than the thickness of the lower half of the mold plate.

[0013] The lifting mechanism is a vertical cam which is located at the top of the lifting bridge and the bottom of the lifting bridge is connected with a vertical cam which is located at the bottom of the lifting bridge. The vertical cam is connected with the support of the lifting bridge to the support frame, and the support frame is connected with the support member to form a circle around the lifting bridge.

[0014] The present invention is further configured as follows: the driving tube fixing assembly includes a height fixing sleeve, an extending fixing block and a height adjusting bolt, the height fixing sleeve is opened on one side of the driving tube conveyor belt, and limiting slide rails are provided on both side walls of the height fixing sleeve, and vertical slide grooves matching the limiting slide rails are provided on both side walls of the fixed mounting opening. The bottom end of the height adjusting bolt is rotatably mounted on the top of the height fixing sleeve box, the front end of the extending fixing block is embedded with a disc motor and a clip is mounted on the rotating shaft of the disc motor, a lower pressure plate is embedded in the bottom of the front half of the extending fixing block, the extending fixing block is embedded with a downward pressure cylinder and the lower pressure plate is mounted on the downward pressure cylinder, an outward push motor is fixed on the rear side wall of the height fixing sleeve and an outward push screw is connected to the rotating shaft of the outward push motor, and the outward push screw is spirally inserted forward from the rear side of the extending fixing block.

[0015] The present invention is further configured such that the number of the front and rear groups of the automatic positioning mechanisms for the driving tubes is the same and each group is one or two;

[0016] When the articulated seat is welded at or near the middle of the drive tube, the number of the drive tube automatic positioning mechanisms in each group is two, and the automatic articulated seat positioning mechanism is arranged between the two drive tube automatic positioning mechanisms in the front group;

[0017] When the articulated seat is welded to the driving tube near the end, each group of the driving tube automatic positioning mechanism has one automatic articulated seat positioning mechanism, and the automatic articulated seat positioning mechanism is arranged beside the front driving tube automatic positioning mechanism.

[0018] The present invention is further configured such that the correction conveyor belt unit includes an articulated seat correction frame and an articulated seat conveyor belt, the articulated seat correction frame includes a feed frame and a correction push-out frame, the output end of the feed frame is vertically connected to the rear end of the correction push-out frame, a conveyor belt is provided in the feed frame, the correction push-out frame is a limited U-shaped slideway, and a pushing device is provided on the rear side of the correction push-out frame that can accurately push the articulated seat from the correction push-out frame to the articulated seat conveyor belt;

[0019] The articulated seat clamping lifting and positioning unit includes a lifting base column, a lifting cylinder, a lifting box and a clamping positioning block. Two movable sleeve columns are provided on the top of the lifting base column, and a downwardly embedded lifting cylinder is provided in the middle position. The rear half of the lifting box is movably sleeved on the lifting base column and the bottom of the lifting box is fixed on the lifting cylinder. The clamping positioning block is movably inserted from the front of the lifting box into its front half. A forward pushing positioning cylinder is embedded in the rear half of the lifting box. The forward pushing positioning cylinder is fixedly connected to the rear side of the clamping positioning block. The upper surface of the output end of the articulated seat conveyor belt is directly below the clamping positioning block.

[0020] The present invention is further configured such that two symmetrical clamping plate mounting grooves are provided on the front side of the clamping positioning block, two clamping plates are symmetrically installed in the clamping plate mounting groove, a clamping motor is provided on both side walls of the front half of the clamping positioning block, a bidirectional screw rod is provided in the clamping plate mounting groove that spirally passes through the two clamping plates, and one end of the bidirectional screw rod is connected to the rotating shaft of the clamping motor.

[0021] The present invention is further configured such that strip holes are provided at the corner positions of the front and rear edges of the mounting base plate, and four limit bolt rods are provided on the upper surface of the base near the left and right edges. The four strip holes on the mounting base plate are correspondingly sleeved on the matching limit bolt rods, and nuts are screwed on the limit bolt rods to fix the mounting base plate.

[0022] The present invention has the following beneficial effects:

[0023] 1. The present invention first fixes the driving plate on a mold plate, so that the driving plate can be set vertically on the mold plate for automatic positioning welding later without manual fixation. When the two driving plates reach the positioning position, the driving tube automatic positioning mechanism starts to transport the two driving tubes to a fixed point and height position for fixation, and then pushes the two driving plates toward the two driving tubes so that the two driving plates and the two driving tubes are accurately positioned and fixed. Finally, the hinge seat is transported to the hinge seat clamping and lifting positioning unit, and then raised to a fixed height to push it onto the inner wall of the driving tube on the front side for fitting and fixing. At this time, the robotic arm moves the laser welding device for automatic welding. After welding is completed, the clamped mold plate, driving tube and hinge seat are released, and the welded sofa chair motor drive tube rack can be clamped and removed by the robotic arm, and then the next group of automatic welding is carried out, with a high degree of automation.

[0024] 2. The present invention can be adjusted to adapt to different sizes of sofa chair motor drive tube rack fixation. Different drive plates can replace the matching mold plate to fix the corresponding model of sofa chair motor drive tube rack, which has better applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a structural schematic diagram of a positioning tool for welding a motor-driven pipe frame for a sofa chair.

[0027] Figure 2 This is a schematic diagram of the exploded structure of a positioning tool for welding a sofa chair motor-driven pipe frame.

[0028] Figure 3 This is a structural diagram of the automatic positioning mechanism of the drive plate.

[0029] Figure 4 Schematic diagram of the exploded structure of the automatic positioning mechanism of the drive plate.

[0030] Figure 5 It is a structural schematic diagram of a driving tube automatic positioning mechanism and an automatic articulated seat positioning mechanism.

[0031] Figure 6 for Figure 5 Schematic diagram of the explosion structure.

[0032] Figure 7 Schematic diagram of the structure of the mold plate.

[0033] Figure 8It is a structural diagram of the mold plate conveyor frame.

[0034] Figure 9 Schematic diagram of the structure of the clamping block.

[0035] Figure 10 Schematic diagram of the structure of the drive tube conveyor belt and height-fixing mounting block (without belt).

[0036] Figure 11 It is a structural diagram of the inverted lifting pull plate.

[0037] Figure 12 It is a structural diagram of the fixed height box.

[0038] Figure 13 It is a structural diagram of the clamping positioning block.

[0039] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0040] 1. Base; 2. Mounting base plate; 3. Drive plate conveying unit; 30. Mold conveying frame; 31. Push belt; 32. Push belt slot; 33. Side push cylinder; 34. Side push plate; 35. Output opening; 36. Protruding slide rail; 4. Drive plate positioning unit; 41. Clamping block; 411. Positioning clamping port; 412. Limiting slide rod socket; 413. Extrusion cylinder socket; 414. Positioning cylinder socket; 42. Positioning cylinder; 43. Extrusion fixing cylinder; 44. First limiting plate; 45. Second limiting plate; 46. Forward push cylinder; 47. First limiting slide; 5. Drive tube automatic positioning mechanism; 51. Drive tube conveying belt; 511. Slot; 52. Fixed installation port; 53. Fixed High mounting block; 531, lifting screw rod; 532, vertical limit slide; 54, inverted lifting pull plate; 540, lifting slot; 6, automatic articulated seat positioning mechanism; 7, mold plate; 71, thickened segment; 711, square opening; 72, slide slot; 73, positioning plate; 8, drive tube fixing assembly; 81, fixed height box; 811, height adjustment bolt; 812, limit slide rail; 82, outward push motor; 83, extending fixed block; 84, disc motor; 85, lower pressure plate; 9, articulated seat clamping lifting positioning unit; 91, lifting base column; 92, lifting cylinder; 93, lifting box; 94, clamping positioning block; 941, clamping plate mounting slot; 95, clamping plate; 951, clamping motor. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] See also Figure 1-13 The present invention is a positioning tool for welding a motor-driven pipe frame of a sofa chair, comprising a base 1, a mounting base 2, an automatic positioning mechanism for a driving plate, an automatic positioning mechanism for a driving pipe 5, and an automatic articulated seat positioning mechanism 6;

[0043] The upper surface of the base 1 is symmetrically provided with mounting base plates 2 near the left and right sides, and a driving plate automatic positioning mechanism is symmetrically installed on the two mounting base plates. The driving plate automatic positioning mechanism includes a driving plate conveying unit 3 and a driving plate positioning unit 4. The driving plate is fixed on the mold plate 7. The mold plates 7 are stacked and placed in the driving plate conveying unit 3, and the mold plates 7 are sent from the driving plate conveying unit 3 to the driving plate positioning unit 4 for fixing.

[0044] First, the drive plate is installed and fixed on the mold plate 7 so that it can be stacked in batches and transported from the drive plate conveying unit 3. Then, it is pushed into the drive plate positioning unit 4 one by one (mainly fixing the lower half of the mold plate 7, and the drive plate fixed in the upper half is also fixed). The drive plate positioning unit 4 can be moved inward a certain distance so that it can be docked and fixed with the drive tube fixed at the back.

[0045] A drive tube automatic positioning mechanism 5 is provided on the base 1 between the two drive plate automatic positioning mechanisms. Two groups of the drive tube automatic positioning mechanisms 5 are symmetrically arranged on the mounting base 2. The drive tube automatic positioning mechanism 5 includes a drive tube conveyor belt 51 and a fixed height lifting and fixing unit. The two groups of the drive tube automatic positioning mechanisms 5 respectively raise one drive tube to a fixed height position, and the two drive plate positioning units 4 respectively push the drive plate on the mold plate 7 therein to the middle position to dock and position with the two drive tubes.

[0046] The driving tubes are arranged one by one in sequence on the driving tube conveyor belt 51 of the driving plate automatic positioning mechanism. When the driving tube conveyor belt 51 is transported to the fixed height lifting and fixing unit, it will be pulled up and fixed at a suitable fixed height position, and then fixed. The positions of the two ends of the driving tube may not be precisely in the butt welding position, but the process of the two driving plates moving relative to each other can push the driving tube to complete precise docking and positioning.

[0047] The automatic articulated seat positioning mechanism 6 is arranged at the position where the drive plate automatic positioning mechanism 5 is located on the front side of the base 1. The automatic articulated seat positioning mechanism 6 includes a correction conveyor belt unit and an articulated seat clamping and lifting positioning unit 9.

[0048] The articulated seat is pushed onto the conveyor belt according to the accurate placement method through the correction conveyor belt unit, and then accurately moved to the articulated seat clamping and lifting positioning unit 9. It is clamped and lifted to the positioning position at a fixed height, and then the robot arm can operate laser welding.

[0049] The driving plate transport unit 3 includes a mold conveying frame 30, a mold pushing assembly and a mold side pushing assembly. The mold conveying frame 30 is a U-shaped conveying frame, and four protruding slide rails 36 are symmetrically provided on the two inner side walls of the mold conveying frame 30. Four slide grooves 72 matching the protruding slide rails 36 are symmetrically provided on both sides of the mold plate 7. A mold pushing assembly is provided at the middle position of the bottom of the mold conveying frame 30, and a square opening 711 is provided in the middle position of the thickened section 71 of the lower half of the mold plate 7, which is sleeved outside the mold pushing assembly. The top of the square opening 711 is placed on the mold pushing assembly. The mold conveying frame 30 is a blocking edge at the output end, and the mold conveying frame 30 is provided with an output opening 35 on one side of the output end facing the driving plate positioning unit 4. The mold conveying frame 30 is provided with a mold side pushing assembly on the side opposite to the output opening 35 at the output end, and is a side pushing cylinder 33 and a side pushing plate 34 installed on the side pushing cylinder 33;

[0050] The lower half of the mold plate 7 is a thickened section 71, which can be transported on the mold conveying rack 30. When it is transported to the output opening 35 (the thickness of the thickened section 71 in the lower half of the mold plate 7 is slightly smaller than the width of the output opening 35), the side push cylinder 33 pushes the side push plate 34, which can push one mold plate 7 into the positioning clamping port 411 for fixation.

[0051] The drive plate positioning unit 4 includes a clamping block 41, a first limiting plate 44 and a second limiting plate 45. Two first limiting slides 47 are provided between the first limiting plate 44 and the second limiting plate 45. The bottom of the clamping block 41 is movably sleeved on the two first limiting slides 47. The second limiting plate 45 is provided with a forward pushing cylinder 46. The clamping block 41 is provided with a positioning clamping port 411 facing the output opening 35. A positioning cylinder 42 group and an extrusion fixing cylinder 43 group are installed on the rear side wall of the clamping block 41.

[0052] After being pushed into the positioning clamping port 411, the positioning cylinder 42 is pushed out and inserted into the positioning hole on the mold plate 7, and then the side push plate 34 is pulled back, and then a row of mold plates 7 are pushed to move. Wait for the next push. The extrusion fixing cylinder 43 group extrude the side wall of the lower half of the mold plate 7 to fix it. When the driving tube reaches the fixed position, the forward pushing cylinder 46 drives the clamping block 41 to move, so that the mold plate 7 moves, and the driving plate moves to the end of the driving tube for docking and fixing, so as to be welded later. The limiting slide rod socket 412 in the figure is the movable hole of the first limiting slide rod 47, the extrusion cylinder socket 413 is the mounting hole of the extrusion fixing cylinder 43; the positioning cylinder socket 414 is the mounting hole of the positioning cylinder 42.

[0053] The mold pushing assembly includes a pushing belt groove 32 and a pushing belt 31. Rollers are provided at both ends of the pushing belt groove 32. The pushing belt 31 is sleeved on the two rollers. The surface of the pushing belt 31 is evenly distributed with protruding semicircular protrusions. A support plate is provided under the upper belt of the pushing belt 31.

[0054] When the mold plate 7 needs to be pushed again, after it is in place, or when there is a gap between the mold plates 7, they can be stacked together when pushed, and the semicircular protrusions on the pushing belt 31 can contact the top wall of the square opening 711 at the bottom of the mold plate 7. When the mold plate 7 can move, it can be pushed by the semicircular protrusions. When it cannot move, the semicircular protrusions will be squeezed and moved from the bottom, so that the mold plates 7 that can be stacked have gaps and can be stacked without gaps. After stacking without gaps, there is no need to stack and push later. Instead, after the mold plates 7 are pushed out one by one, the push belt 31 is used to push the mold plates 7 one by one.

[0055] The upper half of the mold plate 7 is thinned to form a positioning plate 73. The lower half of the mold plate 7 is 3-5 cm thick. The widths of the output opening 35 and the positioning clamping opening 411 are equal and 10-15% greater than the thickness of the lower half of the mold plate 7. The position of the thinned positioning plate 73 can be installed in the position where the driving plate is installed. The thickness of the driving plate and the positioning plate 73 will not be greater than that of the lower half of the mold plate 7. The positioning plate 73 is provided with mounting bolt holes to secure the driving plate.

[0056] The driving tube conveyor belt 51 is provided with slot blocks on both side walls of the output end, and a slot 511 is provided on the slot block. The height-fixing and lifting fixing unit includes a height-fixing mounting block 53, an inverted lifting pull plate 54, a pull plate lifting assembly and a driving tube fixing assembly 8. The height-fixing mounting block 53 is provided with a lifting slot 540 in the middle position of one side wall facing the driving tube conveyor belt 51. The pull plates on both sides of the inverted lifting pull plate 54 are L-shaped pull plates 542, and the bottom end of the L-shaped pull plate 542 can be extended into the slot 511. The pull plate lifting assembly includes two vertical limiting slide bars 532, a lifting and lowering assembly, and a lowering assembly. The screw rod 531 and the lifting motor, the two vertical limit slide rods 532 are installed in the lifting groove 540, and a lifting block 541 is provided in the middle position on the back of the inverted lifting pull plate 54. The two ends of the lifting block 541 are movably sleeved on the vertical limit slide rod 532. The lifting motor shaft is connected with a lifting screw rod 531 and the lifting screw rod 531 is spirally passed through the middle position of the lifting block 541. The height-fixing mounting block 53 is provided with a fixed mounting port 52 in the upper half of both sides of the lifting groove 540, and the drive tube fixing assembly 8 is installed in the fixed mounting port 52.

[0057] Once the drive tube reaches the slot block, the pull plate lifting assembly raises and lowers the inverted pull plate 54. L-shaped pull plate 542 then lifts the drive tube. (Magnets attached to L-shaped pull plate 542 secure the drive tube and prevent it from rolling off during the pulling process.) The lifting motor drives the lifting screw 531 to raise the lifting block 541 to a fixed height. The drive tube securing assembly 8 then activates to secure the drive tube, preventing it from shaking or misalignment during welding. Lifting slot 540 accommodates the bottom end of L-shaped pull plate 542, preventing the drive tube from being smoothly pushed onto it.

[0058] The driving tube fixing assembly 8 comprises a height fixing box 81, an extending fixing block 83 and a height adjusting bolt 811. The height fixing box 81 opens toward one side of the driving tube conveyor belt 51. The two side walls of the height fixing box 81 are provided with limiting slide rails 812. The two side walls of the fixed mounting opening 52 are provided with vertical slide grooves matching the limiting slide rails 812. The bottom end of the height adjusting bolt 811 is rotatably mounted on the top of the height fixing box 81. The front end of the extending fixing block 83 is embedded with a disc motor 84 and a clip is sleeved on the rotating shaft of the disc motor 84. The bottom of the front half of the extending fixing block 83 is embedded with a lower pressure plate 85. The extending fixing block 83 is embedded with a downward pressure cylinder and the lower pressure plate 85 is mounted on the downward pressure cylinder. The rear side wall of the height fixing box 81 is fixed with an outward pushing motor 82 and the rotating shaft of the outward pushing motor 82 is connected to an outward pushing screw, which is spirally inserted forward from the rear side of the extending fixing block 83.

[0059] During the upward movement of the driving tube, the extending fixing block 83 has been extended, and the disc motor 84 sets the clamping strip downward, and the lower end of the clamping strip is bent outward in an arc shape. When the driving tube moves upward, the clamping strip can be smoothly clamped on the outer wall of the driving tube to prevent the driving tube from moving outward. The driving tube is clamped between the clamping strip and the L-shaped pull plate 542. At this time, the downward pressure cylinder moves downward to press the downward pressure plate 85 on the driving tube to complete the fixing of the four walls of the drive, but the driving tube can still be pulled left and right so that later, when the driving plate approaches the two ends of the driving tube, the inaccurate position of the two ends of the driving tube can be calibrated.

[0060] The number of the front and rear groups of the automatic driving tube positioning mechanisms 5 is the same and is one or two;

[0061] When the articulated seat is welded at the middle position of the driving tube or near the middle position, the number of the driving tube automatic positioning mechanisms 5 in each group is two, and the automatic articulated seat positioning mechanism 6 is arranged between the two driving tube automatic positioning mechanisms 5 in the front group;

[0062] When the articulated seat is welded to the driving tube near the end, each group of the driving tube automatic positioning mechanism 5 has one, and the automatic articulated seat positioning mechanism 6 is arranged beside the front driving tube automatic positioning mechanism 5 .

[0063] Since the hinge seat is welded at different positions of the drive tube as needed, the number of the drive tube automatic positioning mechanism 5 is designed. If it is welded at the middle position, the drive tube will shake easily when one drive tube automatic positioning mechanism 5 pulls up the drive tube. Two are designed so that the positions of both ends of the drive tube can be pulled up and fixed synchronously (such as Figure 1-2 All are fixed welded hinged seats in the middle).

[0064] The correction conveyor belt unit includes an articulated seat correction frame and an articulated seat conveyor belt 63. The articulated seat correction frame includes a feed frame 61 and a correction push-out frame 62. The output end of the feed frame 61 is vertically connected to the rear end of the correction push-out frame 62. A conveyor belt is provided in the feed frame 61. The correction push-out frame 62 is a limited U-shaped slide. A pushing device is provided on the rear side of the correction push-out frame 62, which can accurately push the articulated seat from the correction push-out frame 62 to the articulated seat conveyor belt 63.

[0065] The articulated seat is a U-shaped joint, allowing the side walls to be clamped and the center wall to be welded to the back of the drive tube. To precisely move the side walls of the articulated seat into position, the feed frame 61 feeds the articulated seat onto a correction and ejection frame 62 with a limited push mechanism. The pushing mechanism is a push cylinder with a push plate in front. This push plate precisely pushes the articulated seat onto the articulated seat conveyor belt 63, which can accurately move the articulated seat into position without shaking.

[0066] The articulated seat clamping lifting positioning unit 9 includes a lifting base column 91, a lifting cylinder 92, a lifting box 93 and a clamping positioning block 94. The top of the lifting base column 91 is provided with two movable sleeve columns, and the middle position is provided with a downwardly embedded lifting cylinder 92. The rear half of the lifting box 93 is movably sleeved on the lifting base column and the bottom of the lifting box 93 is fixed on the lifting cylinder 92. The clamping positioning block 94 is movably inserted from the front of the lifting box 93 into its front half. The rear half of the lifting box 93 is embedded with a forward pushing positioning cylinder, and the forward pushing positioning cylinder is fixedly connected to the rear side of the clamping positioning block 94. The upper surface of the output end of the articulated seat conveyor belt 63 is directly below the clamping positioning block 94.

[0067] A fixed distance sensor (a laser rangefinder, or a laser rangefinder on the side of the output end of the articulated seat conveyor belt 63, which stops when an articulated seat reaches the position) can be set on the clamping and positioning block 94 to clamp an articulated seat. Then, the lifting cylinder 92 is used to raise it to a fixed height position. Finally, the clamping and positioning block 94 is pushed outward so that the articulated seat is accurately pushed and fixed at a fixed position on the back of the drive tube. Wait for welding. After the welding is completed, the clamping strip is flipped up, and the downward pressure cylinder moves the lower pressure plate 85 up to the inside of the extended fixed block 83. Then, the extended fixed block 83 is retracted. At the same time, the positioning cylinder and the extrusion fixing cylinder are all retracted, and the clamping of the articulated seat position is released. The fixed mold plates are also released. At this time, the mechanical arm can be used to operate the motor-driven pipe rack of the sofa chair for clamping and welding (including lifting the two mold plates together), move it to the placement position, and wait for the next movement and fixed positioning for welding.

[0068] Two symmetrical clamping plate mounting grooves 941 are provided on the front side of the clamping positioning block 94, and two clamping plates 95 are symmetrically installed in the clamping plate mounting grooves 941. A clamping motor 951 is provided on both side walls of the front half of the clamping positioning block 94, and a bidirectional screw rod is provided in the clamping plate mounting grooves 941 that spirally passes through the two clamping plates, and one end of the bidirectional screw rod is connected to the rotating shaft of the clamping motor 951.

[0069] The two clamping plates 95 can move and clamp each other under the rotation of the bidirectional screw rod, or can be separated from each other to release the clamping. The inner side of the clamping plate 95 is provided with rubber skin for easy clamping.

[0070] The mounting base plate 2 is provided with strip holes at the corner positions of the front and rear edges, and the upper surface of the base 1 is provided with four limit bolt rods near the left and right edges. The four strip holes on the mounting base plate 2 are correspondingly sleeved on the matching limit bolt rods, and nuts are screwed on the limit bolt rods to fix the mounting base plate 2.

[0071] The mounting base plate 2 can be adjusted to adapt to changes in the length of the drive tube, so as to weld drive tubes of different models.

[0072] Once again, if the drive plate has a square hole where it connects to the drive tube, and the end of the drive tube fits neatly into the hole for welding, a positioning and squeezing device should be installed on the mounting base 2, facing outward from the clamping block 41. During docking, the positioning and squeezing device can block the squeezing plate against the square hole on the outside of the drive plate, so that the drive tube fits neatly into the hole and does not extend further. (The positioning and squeezing device is not shown; its placement depends on whether the drive plate has a square hole.) After the positioning and squeezing device is positioned, it should be withdrawn to prevent welding from hitting the positioning and squeezing device.

[0073] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning tool for welding a motor-driven pipe frame for a sofa chair, characterized by: It comprises a base (1), a mounting base plate (2), a drive plate automatic positioning mechanism, a drive tube automatic positioning mechanism (5) and an automatic articulated seat positioning mechanism (6); The upper surface of the base (1) is symmetrically provided with mounting base plates (2) near the left and right sides, and a driving plate automatic positioning mechanism is symmetrically installed on the two mounting base plates (2). The driving plate automatic positioning mechanism includes a driving plate conveying unit (3) and a driving plate positioning unit (4), which fixes the driving plate on the mold plate (7). The stacked mold plates (7) are placed in the driving plate conveying unit (3), and the mold plates (7) are conveyed from the driving plate conveying unit (3) to the driving plate positioning unit (4) for fixing. A drive tube automatic positioning mechanism (5) is provided on the base (1) between the two drive plate automatic positioning mechanisms. Two groups of the drive tube automatic positioning mechanisms (5) are symmetrically provided on the mounting base plate (2). The drive tube automatic positioning mechanism (5) comprises a drive tube conveyor belt (51) and a fixed height lifting and fixing unit. The two groups of the drive tube automatic positioning mechanisms (5) respectively lift one drive tube to a fixed height position, and the two drive plate positioning units (4) respectively push the drive plate on the mold plate (7) therein to the middle position to dock with the two drive tubes for positioning. The automatic articulated seat positioning mechanism (6) is arranged at the position of the group of drive plate automatic positioning mechanisms (5) on the front side of the base (1), and the automatic articulated seat positioning mechanism (6) includes a correction conveyor belt unit and an articulated seat clamping and lifting positioning unit (9).

2. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 1, characterized in that: The driving plate transport unit (3) comprises a mold conveying frame (30), a mold pushing assembly and a mold side pushing assembly. The mold conveying frame (30) is a U-shaped conveying frame. Four protruding slide rails (36) are symmetrically provided on the two inner side walls of the mold conveying frame (30). Four slide grooves (72) matching the protruding slide rails (36) are symmetrically provided on both sides of the mold plate (7). A mold pushing assembly is provided at the middle position of the bottom of the mold conveying frame (30). The middle position of the thickened section (71) on the lower half of the mold plate (7) is provided. A square opening (711) is provided outside the mold pushing assembly, the top of the square opening (711) is placed on the mold pushing assembly, the mold conveying frame (30) is a blocking edge at the output end, the mold conveying frame (30) is provided with an output opening (35) on a side of the output end facing the drive plate positioning unit (4), and the mold conveying frame (30) is provided with a mold side pushing assembly and a side pushing cylinder (33) and a side pushing plate (34) installed on the side pushing cylinder (33) on the side of the output end opposite to the output opening (35); The driving plate positioning unit (4) includes a clamping block (41), a first limiting plate (44) and a second limiting plate (45), two first limiting slide bars (47) are provided between the first limiting plate (44) and the second limiting plate (45), the bottom of the clamping block (41) is movably sleeved on the two first limiting slide bars (47), the second limiting plate (45) is provided with a forward pushing cylinder (46), the clamping block (41) is provided with a positioning clamping opening (411) facing the output opening (35), and a positioning cylinder (42) group and an extrusion fixing cylinder (43) group are installed on the rear side wall of the clamping block (41).

3. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 1, characterized in that: The mold pushing assembly comprises a pushing belt groove (32) and a pushing belt (31), wherein rollers are provided at both ends of the pushing belt groove (32), and the pushing belt (31) is sleeved on the two rollers, and the surface of the pushing belt (31) is provided with protruding semicircular protrusions evenly distributed, and a support plate is provided below the upper belt of the pushing belt (31).

4. A positioning tool for welding a motor-driven pipe frame for a sofa chair according to any one of claims 1 or 2, characterized in that: The upper half of the mold plate (7) is thinned to form a positioning plate (73), the lower half of the mold plate (7) has a thickness of 3-5 cm, and the widths of the output opening (35) and the positioning clamping opening (411) are equal and 10-15% greater than the thickness of the lower half of the mold plate (7).

5. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 1, characterized in that: The driving tube conveyor belt (51) is provided with slot blocks on both side walls of the output end, and the slot blocks are provided with slots (511). The height-fixing and lifting fixing unit includes a height-fixing installation block (53), an inverted lifting pull plate (54), a pull plate lifting assembly and a driving tube fixing assembly (8). The height-fixing installation block (53) is provided with a lifting slot (540) at the middle position of a side wall facing the driving tube conveyor belt (51). The pull plates on both sides of the inverted lifting pull plate (54) are L-shaped pull plates (542) and the bottom ends of the L-shaped pull plates (542) can be extended into the slots (511). The pull plate lifting assembly includes two vertical limit slide bars (532), a lifting screw rod, and a lifting screw rod. (531) and a lifting motor, the two vertical limit slides (532) are installed in the lifting groove (540), a lifting block (541) is provided in the middle position of the back of the inverted lifting pull plate (54), and the two ends of the lifting block (541) are movably sleeved on the vertical limit slide (532), a lifting screw (531) is connected to the lifting motor shaft and the lifting screw (531) is spirally passed through the middle position of the lifting block (541), the fixed height mounting block (53) is provided with a fixed mounting port (52) in the upper half of both sides of the lifting groove (540), and the drive tube fixing assembly (8) is installed in the fixed mounting port (52).

6. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 5, characterized in that: The driving tube fixing assembly (8) includes a height-fixing box (81), a protruding fixing block (83) and a height-adjusting bolt (811). The height-fixing box (81) opens toward one side of the driving tube conveyor belt (51). The side walls of the height-fixing box (81) are provided with position-limiting slide rails (812). The side walls of the fixed installation opening (52) are provided with vertical slide grooves matching the position-limiting slide rails (812). The bottom end of the height-adjusting bolt (811) is rotatably mounted on the top of the height-fixing box (81). The front end of the block (83) is embedded with a disc motor (84) and a card strip is sleeved on the rotating shaft of the disc motor (84), the bottom of the front half of the extended fixed block (83) is embedded with a lower pressure plate (85), the extended fixed block (83) is embedded with a lower pressure cylinder and the lower pressure plate (85) is installed on the lower pressure cylinder, the rear side wall of the height-fixing box (81) is fixed with an outward motor (82) and the rotating shaft of the outward motor (82) is connected to an outward push screw, and the outward push screw is spirally inserted forward from the rear side of the extended fixed block (83).

7. A positioning tool for welding a motor-driven pipe frame for a sofa chair according to any one of claims 1, 5 or 6, characterized in that: The number of the front and rear groups of the automatic driving tube positioning mechanisms (5) is the same and is one or two; When the articulated seat is welded at the middle position of the drive tube or close to the middle position, the number of the drive tube automatic positioning mechanisms (5) in each group is two, and the automatic articulated seat positioning mechanism (6) is arranged between the two drive tube automatic positioning mechanisms (5) in the front group; When the articulated seat is welded to a position near the end of the drive tube, the number of the drive tube automatic positioning mechanism (5) in each group is one, and the automatic articulated seat positioning mechanism (6) is arranged next to the front drive tube automatic positioning mechanism (5).

8. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 1, characterized in that: The correction conveyor belt unit includes an articulated seat correction frame and an articulated seat conveyor belt (63), the articulated seat correction frame includes a feed frame (61) and a correction push-out frame (62), the output end of the feed frame (61) is vertically connected to the rear end of the correction push-out frame (62), a conveyor belt is provided in the feed frame (61), the correction push-out frame (62) is a limited U-shaped slideway, and a pushing device is provided on the rear side of the correction push-out frame (62) that can accurately push the articulated seat from the correction push-out frame (62) to the articulated seat conveyor belt (63); The articulated seat clamping lifting positioning unit (9) includes a lifting base column (91), a lifting cylinder (92), a lifting box (93) and a clamping positioning block (94). The top of the lifting base column (91) is provided with two movable sleeve columns, and the middle position is provided with a lifting cylinder (92) embedded downward. The rear half of the lifting box (93) is movably sleeved on the lifting base column (91) and the bottom of the lifting box (93) is fixed on the lifting cylinder (92). The clamping positioning block (94) is movably inserted from the front of the lifting box (93) into its front half. The rear half of the lifting box (93) is embedded with a forward positioning cylinder. The forward positioning cylinder is fixedly connected to the rear side of the clamping positioning block (94). The upper surface of the output end of the articulated seat conveyor belt (63) is directly below the clamping positioning block (94).

9. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 8, characterized in that: The front side of the clamping positioning block (94) is provided with two symmetrical clamping plate mounting grooves (941), and two clamping plates (95) are symmetrically mounted in the clamping plate mounting grooves (941). A clamping motor (951) is provided on both side walls of the front half of the clamping positioning block (94), and a bidirectional screw rod spirally penetrating the two clamping plates is provided in the clamping plate mounting grooves (941), and one end of the bidirectional screw rod is connected to the rotating shaft of the clamping motor (951).

10. The positioning tool for welding the motor drive pipe frame of a sofa chair according to claim 1, characterized in that: The corner positions of the front and rear edges of the mounting base plate (2) are both provided with strip holes, and the upper surface of the base (1) is provided with four limit bolt rods near the left and right edges. The four strip holes on the mounting base plate (2) are correspondingly sleeved on the matching limit bolt rods, and nuts are screwed on the limit bolt rods to fix the mounting base plate (2).

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