A displacement welding device for office chair base

Abstract

The present invention discloses a displacement welding device for an office chair base, and the present invention relates to the field of displacement welding technology, including a chair leg clamping mechanism, the surface of which is fixedly mounted on the bottom of the inner side surface of a device body, and the chair leg clamping mechanism is used to clamp the chair leg tube and guide the movement of the chair leg tube. The displacement welding device for the office chair base achieves the goal of supporting the fixed sleeve with a shrinkage limit assembly, at which time the axis of the fixed sleeve is close to the axis of the hydraulic cylinder but not overlapped, the quick clamping assembly clamps the surface of the chair leg tube, the screw slide controls the quick clamping assembly to be close to the middle position of the inner side surface of the device body, as the chair leg tube is pushed forward, the axis of the fixed sleeve coincides with the axis of the hydraulic cylinder, and the welding displacement mechanism moves downward to weld the joint line between the chair leg tube and the fixed sleeve, thus solving the problem of how to quickly position and weld the five-star chair legs of an office chair.

Description

Technical Field

[0001] The invention relates to the technical field of position-shifting welding, in particular to position-shifting welding equipment for an office chair base. Background Art

[0002] During the welding process, welding processing is usually carried out on different positions of the same workpiece, and welding positioners are often used for assistance. However, traditional welding positioners are mostly single-degree-of-freedom motion adjustments, and the remaining position adjustments require the multi-degree-of-freedom operation of welding robots. On the one hand, the equipment cost of the robot is high, and on the other hand, the programming of the robot is complex, and the robot is large in size. When welding at different positions, the movement of the welding robot itself takes a long time, which affects the efficiency of the welding process. The welding pipe of the welding gun runs from the inside of the bracket, which is not conducive to replacement and maintenance. The welding wire is under the action of tension or thrust inside the entire bracket, which makes the welding wire easy to be damaged or blocked. The length of the welding wire tube cannot be controlled, so that the welding wire tube and the welding end are often pulled, making the welding wire tube easy to fall off. The existing brackets for welding gun heads are basically horizontal conveyor belts. This bracket only provides horizontal displacement, and the welding hand needs to make all-round adjustments during welding. The base of an office chair is usually a five-star chair leg. Currently, the welding of the five-star chair legs is all done manually. The efficiency of manual welding is very low, and the labor intensity of workers engaged in welding is very high. Fatigue operation can easily lead to defective welding. Manual welding operation causes irregular stress at the welding point, resulting in a decrease in the service life of the five-star chair legs.

[0003] The existing position-shifting welding equipment for the base of an office chair has problems, due to structural design defects, such as how to quickly position-weld the five-star chair legs of the office chair, and how to weld the five chair leg tubes in one clamping operation. Summary of the invention

[0004] The present invention provides a displacement welding device for an office chair base, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a displacement welding device for an office chair base, comprising a device body, a circumferential slide rail is fixedly connected to the top of the device body near the middle, and a circumferential slide table is slidably connected to the inner side of the circumferential slide rail; and further comprising:

[0006] A chair leg clamping mechanism, the surface of which is fixedly mounted on the bottom of the inner side surface of the device body, and the chair leg clamping mechanism is used to clamp the chair leg tube and guide the movement of the chair leg tube;

[0007] A positioning component, the upper position of the positioning component surface is fixedly installed at the middle position of the top of the device body, and the positioning component is used for limiting support of the seat fixing sleeve;

[0008] A welding displacement mechanism, wherein the upper position of the surface of the welding displacement mechanism is fixedly connected to the inner side surface of the circumferential slide, and the welding displacement mechanism is used for welding the joint line between the chair leg tube and the fixed sleeve and for winding and guiding the welding wire;

[0009] The welding displacement mechanism comprises a cylinder, the upper position of the cylinder surface is fixedly mounted on the inner side of the circular slide, the output end of the cylinder is rotatably connected to a winding assembly, the bottom of the winding assembly is rotatably connected to a driving assembly, the surface of the driving assembly is fixedly connected to a welding gun, the side of the driving assembly surface away from the welding gun is fixedly connected to a wire feeding assembly, the driving assembly is used for rotating the welding gun, and the wire feeding assembly is used for supporting and guiding the welding wire.

[0010] Preferably, the chair leg clamping mechanism includes a screw slide, the surface of the screw slide is fixedly installed on the bottom of the inner side of the device body, and the top of the screw slide is fixedly connected to a guide plate near the edge. The office chair leg is welded by five chair leg tubes and a fixed sleeve. During welding in the prior art, the five chair leg tubes are aligned and welded to the fixed sleeve respectively, and the welding efficiency is low. In this device, the screw slide clamps the surface of the chair leg tube, and the five screw slides push the five chair leg tubes toward the center. The hydraulic cylinder in the middle position of the circular slide rail drives the extension rod to move downward. After the contraction limit assembly passes downward through the fixed sleeve, hydraulic pressure is introduced into the cylinder body to expand the contraction limit assembly.

[0011] Preferably, the chair leg clamping mechanism also includes a support platform, the bottom of the support platform is fixedly mounted on the output end of the screw slide, the middle position of the support platform surface is fixedly connected to a lifting platform, and the top of the support platform is fixedly connected to a quick clamping assembly.

[0012] Preferably, the quick clamping assembly includes a lifting plate and a semi-cylinder, the surface of the lifting plate is fixedly mounted on the surface of the lifting platform, and the bottom of the semi-cylinder is fixedly mounted on the top of the support platform. The fixed sleeve is held to the position directly below the extension rod, and the hydraulic cylinder drives the extension rod to move downward. At this time, the elastic wall is in a contracted state. When the limit rod passes through the fixed sleeve, hydraulic pressure is passed into the interior of the cylinder body, and the piston rod is pushed to slide upward. The lower position of the inner side of the piston rod slides upward along the extension rod, and the connecting rod drives the limit rod to rotate upward, the elastic wall is expanded, and the surface of the limit rod supports the fixed sleeve at the upper position.

[0013] Preferably, the quick clamping assembly further comprises a rubber sheet, the bottom of which is fixedly mounted on the top of the semi-cylinder, and the inner side of the rubber sheet is fixedly connected with a side-pressure arc shell.

[0014] Preferably, the positioning assembly includes a hydraulic cylinder, the bottom of which is fixedly installed on the top of the device body, the output end of the hydraulic cylinder is fixedly connected to an extension rod, and the position below the surface of the extension rod is fixedly connected to the cylinder body, after the bottom of the fixed sleeve is supported and limited by the contraction limit assembly, the quick clamping assembly quickly clamps the surface of the chair leg tube, the screw slide drives the support platform to approach the fixed sleeve, the universal wheel at the bottom of the chair leg tube is supported and slid by the guide plate, the end face of the chair leg tube is engaged with the surface of the fixed sleeve, and the cylinder drives the winding assembly to move downward, and an opening is provided at the bottom of the driving assembly.

[0015] Preferably, the positioning assembly further comprises a piston rod, the upper portion of the piston rod surface is slidably connected to the inner side surface of the cylinder body, and the lower portion of the piston rod surface is fixedly connected to a contraction limiting assembly.

[0016] The winding assembly includes a rotating body, the surface of which is rotatably mounted on the output end of the cylinder, the bottom end of the rotating body is fixedly connected to a circular frame, the inner side surface of the circular frame is fixedly connected to a servo motor, and the output end of the servo motor is fixedly connected to a winding wheel.

[0017] Preferably, the contraction limit assembly includes a connecting rod, one end of the connecting rod is rotatably connected to the surface of the piston rod, the end of the connecting rod away from the piston rod is rotatably connected to the limit rod, the bottom end of the extension rod is fixedly connected to a supporting ball, the surface of the limit rod is fixedly connected to an elastic wall, the surface of the piston rod at the output end of the cylinder is rotatably connected to a winding assembly, the surface of the winding assembly is wound with welding wire, one end of the welding wire passes through the guide sleeve and extends to the ejection end of the welding gun, when the ejection end of the welding gun is opposite to the joining line of the chair leg tube, the welding gun heat-melts the end face of the welding wire.

[0018] Preferably, the welding displacement mechanism further comprises a cylinder, the upper position of the cylinder surface is fixedly mounted on the inner side surface of the circular slide, and the output end of the cylinder is rotatably connected to a winding assembly.

[0019] Preferably, the driving assembly includes a guide sliding wall, the top of which is fixedly mounted on the output end of the cylinder, the inner side surfaces of the guide sliding wall are rotatably connected to a cutting worm wheel and a worm respectively, and the surface of the cutting worm wheel is fixedly connected to a slotted rod.

[0020] Preferably, the wire feeding assembly includes a fixed body, the surface of the fixed body is fixedly connected to the surface of the slotted rod, the lower position of the inner side surface of the fixed body is rotatably connected to a wire guide wheel, the surface of the chair foot tube is provided with a mark, the marked position of the chair foot tube is placed on the inner side surface of the lifting plate, the lifting platform drives the lifting plate to move upward, and the rubber sheet is pushed by the lifting plate to approach the surface of the chair foot tube, the side pressure arc shell on the inner side surface of the rubber sheet is in direct contact with the surface of the chair foot tube, the width of the upper position of the side pressure arc shell is greater than the width of the lower position, and when the rubber sheet is pushed, the side pressure arc shell squeezes the upper position of the surface of the chair foot tube, thereby quickly clamping multiple chair foot tubes.

[0021] Preferably, the wire feeding assembly further comprises a position changing platform, the upper position of the surface of the position changing platform is fixedly mounted on the lower position of the surface of the fixed body, and the bottom of the position changing platform is fixedly connected with a guide sleeve.

[0022] The present invention provides a displacement welding device for an office chair base, which has the following beneficial effects:

[0023] 1. The displacement welding equipment of the office chair base uses a retracted limit assembly to support the fixed sleeve. At this time, the axis of the fixed sleeve is close to the axis of the hydraulic cylinder but not coincident with it. The quick clamping assembly clamps the surface of the chair leg tube. The screw slide controls the quick clamping assembly to be close to the middle position of the inner side of the device body. As the chair leg tube is pushed forward, the axis of the fixed sleeve coincides with the axis of the hydraulic cylinder. The welding displacement mechanism moves downward to weld the joint line between the chair leg tube and the fixed sleeve, which solves the problem of how to quickly perform positioning welding on the five-star chair legs of the office chair.

[0024] 2. The displacement welding equipment of the office chair base supports the limit rod with a supporting ball for rotational support. At this time, the axis of the fixed sleeve is close to the axis of the extension rod but not coincident with it. When the side pressure arc shell is pushed close to the chair foot tube, the side pressure arc shell clamps the surface of the chair foot tube firmly and quickly. The five chair foot tubes approach the fixed sleeve from the outside to the inside. The movement of the chair foot tube forms a centering effect, so that the axis of the fixed sleeve coincides with the axis of the extension rod, so that the fixed sleeve and the five chair foot tubes are limited at the same time, effectively improving the welding efficiency of the office base.

[0025] 3. The displacement welding equipment of the office chair base drives the opening at the bottom of the component to pass through the chair leg tube. At this time, the ejection end of the welding gun is opposite to the gap between the chair leg tube and the fixed sleeve. The wire feeding component guides the welding wire, and the welding gun heat-melts the welding wire. After the welding wire is heat-melted, it fills the points of the joint line. The driving component drives the welding gun to rotate, and the end faces of the welding gun and the welding wire rotate left and right along the joint line. The joint line between the chair leg tube and the fixed sleeve is welded, which solves the problem of how to weld five chair leg tubes in one clamping operation.

[0026] 4. The displacement welding equipment of the office chair base has a wire guide wheel driven by a motor to rotate, and a wire winding assembly to release the wire. The wire guide wheel guides the welding wire in a direction-changing manner and conveys the welding wire. The worm is driven by an external motor to rotate. When the worm rotates and drives the cutting worm wheel to rotate downward, the wire winding assembly increases the amount of wire release, thereby preventing the welding wire from being pulled and broken when the cutting worm wheel rotates downward. Similarly, when the cutting worm wheel rotates upward, the wire winding assembly reduces the amount of wire release, thereby preventing the welding wire from being broken or blocked by the push and pull forces during displacement welding of the base.

[0027] 5. The displacement welding equipment of the office chair base has openings at the bottom of the cutting worm wheel and the guide sliding wall. When the cutting worm wheel and the guide sliding wall move downward, they pass through the chair leg tube. There are two worms, and the two worms are symmetrically distributed on both sides of the cutting worm wheel. When the worm is driven to rotate by the motor, the cutting worm wheel drives the welding gun to rotate. The symmetrically arranged worms provide limited support for the cutting worm wheel. The cutting worm wheel rotates clockwise for a certain angle and then rotates in the opposite direction for a certain angle, thereby firmly welding the chair leg tube to the surface of the fixed sleeve, making the positioning welding of the base more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of the entire top of the position-shifting welding device for the base of an office chair of the present invention;

[0029] Figure 2 A three-dimensional diagram of the partial bottom of the displacement welding device of the office chair base of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the chair leg clamping mechanism of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the quick clamping assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the structural connection between the positioning assembly and the welding displacement mechanism of the present invention;

[0033] Figure 6 It is a structural schematic diagram of the contraction limit assembly of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the winding assembly of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the driving assembly of the present invention;

[0036] Fig. 9 It is a schematic structural diagram of the wire feeding assembly of the present invention.

[0037] In the figure: 1, device body; 2, chair leg clamping mechanism; 21, screw slide; 22, guide plate; 23, support platform; 24, lifting platform; 25, quick clamping assembly; 251, lifting plate; 252, semi-cylinder; 253, rubber sheet; 254, side pressure arc shell; 3, positioning assembly; 31, hydraulic cylinder; 32, extension rod; 33, cylinder body; 34, piston rod; 35, contraction limit assembly; 351, connecting rod; 352, limit rod; 353, support ball; 35 4. Elastic wall; 4. Circular slide rail; 5. Circular slide table; 6. Welding displacement mechanism; 61. Cylinder; 62. Winding assembly; 621. Rotating body; 622. Circular frame; 623. Servo motor; 624. Winding wheel; 63. Driving assembly; 631. Guide sliding wall; 632. Cutting worm gear; 633. Worm; 634. Slotted rod; 64. Welding gun; 65. Wire feeding assembly; 651. Fixed body; 652. Guide wire wheel; 653. Displacement table; 654. Guide sliding sleeve. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0039] First embodiment: Figure 1-Figure 5 As shown, the present invention provides a technical solution: a displacement welding device for an office chair base, comprising a device body 1, a circumferential slide rail 4 is fixedly connected to the top of the device body 1 near the middle, and a circumferential slide table 5 is slidably connected to the inner side of the circumferential slide rail 4; and further comprising:

[0040] A chair leg clamping mechanism 2, the surface of which is fixedly mounted on the bottom of the inner side of the device body 1, and the chair leg clamping mechanism 2 is used for clamping the chair leg tube and guiding the movement of the chair leg tube;

[0041] A positioning component 3, the upper position of the surface of the positioning component 3 is fixedly installed at the middle position of the top of the device body 1, and the positioning component 3 is used for limiting support of the seat fixing sleeve;

[0042] The welding displacement mechanism 6, the upper position of the surface of the welding displacement mechanism 6 is fixedly connected to the inner side surface of the circumferential slide 5, and the welding displacement mechanism 6 is used for welding the joint line between the chair leg tube and the fixed sleeve and for winding and guiding the welding wire;

[0043] The chair leg clamping mechanism 2 includes a screw slide 21, the surface of which is fixedly mounted on the bottom of the inner side of the device body 1, and a guide plate 22 is fixedly connected to the top of the screw slide 21 near the edge. The chair leg clamping mechanism 2 also includes a support platform 23, the bottom of which is fixedly mounted on the output end of the screw slide 21, a lifting platform 24 is fixedly connected to the middle of the surface of the support platform 23, and a quick clamping assembly 25 is fixedly connected to the top of the support platform 23;

[0044] The positioning assembly 3 includes a hydraulic cylinder 31, the bottom of which is fixedly installed on the top of the device body 1, the output end of the hydraulic cylinder 31 is fixedly connected to an extension rod 32, and the lower position of the surface of the extension rod 32 is fixedly connected to a cylinder body 33. The positioning assembly 3 also includes a piston rod 34, the upper position of the surface of the piston rod 34 is slidably connected to the inner side surface of the cylinder body 33, and the lower position of the surface of the piston rod 34 is fixedly connected to a contraction limit assembly 35.

[0045] When in use, the office chair leg is welded by five chair leg tubes and fixed sleeves. In the prior art, the five chair leg tubes are aligned and welded with the fixed sleeves respectively, and the welding efficiency is low. In the device, the screw slide 21 clamps the surface of the chair leg tube, and the five screw slides 21 push the five chair leg tubes toward the center. The hydraulic cylinder 31 at the middle position of the circular slide rail 4 drives the extension rod 32 to move downward. After the contraction limit assembly 35 passes through the fixed sleeve downward, the hydraulic pressure is introduced into the cylinder body 33 to expand the contraction limit assembly 35. The contraction limit assembly 35 supports the fixed sleeve. At this time, the axis of the fixed sleeve is close to the axis of the hydraulic cylinder 31 but not coincident. The quick clamping assembly 25 clamps the surface of the chair leg tube. The screw slide 21 controls the quick clamping assembly 25 to be close to the middle position of the inner side of the device body 1. As the chair leg tube is pushed forward, the axis of the fixed sleeve coincides with the axis of the hydraulic cylinder 31. The welding displacement mechanism 6 moves downward to weld the joint line between the chair leg tube and the fixed sleeve, which solves the problem of how to quickly position and weld the five-star chair legs of the office chair.

[0046] Second embodiment: Figure 3-Figure 6 As shown, the quick clamping assembly 25 includes a lifting plate 251 and a semi-cylinder 252. The surface of the lifting plate 251 is fixedly mounted on the surface of the lifting platform 24, and the bottom of the semi-cylinder 252 is fixedly mounted on the top of the support platform 23. The quick clamping assembly 25 also includes a rubber sheet 253. The bottom of the rubber sheet 253 is fixedly mounted on the top of the semi-cylinder 252. The inner side surface of the rubber sheet 253 is fixedly connected with a side pressure arc shell 254. The contraction limit assembly 35 includes a connecting rod 351. One end of the connecting rod 351 is rotatably connected to the surface of the piston rod 34. The end of the connecting rod 351 away from the piston rod 34 is rotatably connected to the limit rod 352. The bottom end of the extension rod 32 is fixedly connected to the supporting sphere 353, and the surface of the limit rod 352 is fixedly connected to the elastic wall 354.

[0047] When in use, the fixed sleeve is held to the position just below the extension rod 32, and the hydraulic cylinder 31 drives the extension rod 32 to move downward. At this time, the elastic wall 354 is in a contracted state. When the limit rod 352 passes through the fixed sleeve, hydraulic pressure is passed into the cylinder body 33, and the piston rod 34 is pushed to slide upward. The lower position of the inner side of the piston rod 34 slides upward along the extension rod 32, and the connecting rod 351 drives the limit rod 352 to rotate upward, and the elastic wall 354 is expanded. The surface of the limit rod 352 supports the fixed sleeve at the upper position, and the support The supporting ball body 353 provides rotational support for the limiting rod 352. At this time, the axis of the fixed sleeve is close to the axis of the extension rod 32 but not coincident with it. When the side pressure arc shell 254 is pushed close to the chair foot tube, the side pressure arc shell 254 clamps the surface of the chair foot tube firmly and quickly. The five chair foot tubes approach the fixed sleeve from the outside to the inside. The movement of the chair foot tube forms a centering effect, so that the axis of the fixed sleeve coincides with the axis of the extension rod 32, so that the fixed sleeve and the five chair foot tubes are limited at the same time, effectively improving the welding efficiency of the office base.

[0048] The third embodiment: Figure 3 , Figure 5 As shown, the surface of the screw slide 21 is fixedly mounted on the bottom of the inner side of the device body 1, and a guide plate 22 is fixedly connected to the top of the screw slide 21 near the edge. The chair leg clamping mechanism 2 also includes a support platform 23, the bottom of the support platform 23 is fixedly mounted on the output end of the screw slide 21, a lifting platform 24 is fixedly connected to the middle position of the surface of the support platform 23, and a quick clamping assembly 25 is fixedly connected to the top of the support platform 23;

[0049] The welding displacement mechanism 6 includes a driving component 63, which is arranged at the lower position of the circumferential slide 5. The surface of the driving component 63 is fixedly connected to a welding gun 64, and the side of the surface of the driving component 63 away from the welding gun 64 is fixedly connected to a wire feeding component 65. The driving component 63 is used for rotating the welding gun 64, and the wire feeding component 65 is used for supporting and guiding the welding wire. The welding displacement mechanism 6 also includes a cylinder 61. The upper position of the surface of the cylinder 61 is fixedly installed on the inner side surface of the circumferential slide 5, and the output end of the cylinder 61 is rotatably connected to a winding component 62.

[0050] When in use, after the bottom of the fixed sleeve is supported and limited by the retracted limit assembly 35, the quick clamping assembly 25 quickly clamps the surface of the chair leg tube, the screw slide 21 drives the support platform 23 to approach the fixed sleeve, and the universal wheel at the bottom of the chair leg tube is supported and slid by the guide plate 22, and the end face of the chair leg tube is engaged with the surface of the fixed sleeve, and the cylinder 61 drives the winding assembly 62 to move downward. The bottom of the driving assembly 63 is provided with an opening, and the opening at the bottom of the driving assembly 63 passes through the chair leg tube. At this time, the ejection end of the welding gun 64 is opposite to the gap between the chair leg tube and the fixed sleeve, the wire feeding assembly 65 guides the welding wire, and the welding gun 64 heat-melts the welding wire. After the welding wire is hot-melted, the points of the joint line are filled, and the driving assembly 63 drives the welding gun 64 to rotate, and the end faces of the welding gun 64 and the welding wire rotate left and right along the joint line, and the joint line between the chair leg tube and the fixed sleeve is welded, which solves the problem of how to weld five chair leg tubes in one clamping operation.

[0051] Fourth embodiment: Figure 5-Figure 8 As shown, the winding assembly 62 includes a rotating body 621, the surface of the rotating body 621 is rotatably mounted on the output end of the cylinder 61, the bottom end of the rotating body 621 is fixedly connected to a circular frame 622, the inner side surface of the circular frame 622 is fixedly connected to a servo motor 623, the output end of the servo motor 623 is fixedly connected to a winding wheel 624, the driving assembly 63 includes a guide sliding wall 631, the top of the guide sliding wall 631 is fixedly mounted on the output end of the cylinder 61, the inner side surface of the guide sliding wall 631 is rotatably connected to a cutting worm gear 632 and a worm 633, and the surface of the cutting worm gear 632 is fixedly connected to a slotted rod 634.

[0052] When in use, after the chair leg tube and the fixed sleeve are connected, the cylinder 61 drives the circular frame 622 to move downward, and the bottom of the cutting worm wheel 632 passes through the chair leg tube until the output end of the welding gun 64 is opposite to the interface between the chair leg tube and the fixed sleeve. The surface of the winding wheel 624 is wound with welding wire, and one end of the welding wire passes through the slotted rod 634 and is then guided to the output end of the welding gun 64 by the wire feeding assembly 65. When the interface is welded, the cutting worm wheel 632 rotates forward and reverse on the inner side surface of the guide sliding wall 631, thereby welding the annular interface. In this process, the tension of the welding wire between the wire feeding assembly 65 and the winding wheel 624 is uncontrollable, which can easily cause the welding wire to be wound or broken. In the device, the servo motor 623 controls the rotation speed and direction of the winding wheel 624, thereby controlling the tension of the welding wire. The rotating body 621 arranged opposite to each other above and below the circular frame 622 enables it to deflect as the welding gun 64 rotates left and right, thereby preventing the welding wire from being pulled away from the winding wheel 624.

[0053] Fifth embodiment: Figure 5 , Figure 8 , Fig. 9As shown, the driving assembly 63 includes a guide sliding wall 631, the top of which is fixedly mounted on the output end of the cylinder 61, the inner side surfaces of the guide sliding wall 631 are rotatably connected with a cutting worm wheel 632 and a worm 633 respectively, the surface of the cutting worm wheel 632 is fixedly connected with a slotted rod 634, the wire feeding assembly 65 includes a fixed body 651, the surface of the fixed body 651 is fixedly connected with the surface of the slotted rod 634, the lower position of the inner side surface of the fixed body 651 is rotatably connected with a guide wire wheel 652, the wire feeding assembly 65 also includes a displacement platform 653, the upper position of the surface of the displacement platform 653 is fixedly mounted on the lower position of the surface of the fixed body 651, and the bottom of the displacement platform 653 is fixedly connected with a guide sliding sleeve 654.

[0054] When in use, the output end of the cylinder 61 is rotatably connected to the winding assembly 62, and the surface of the winding assembly 62 is wound with welding wire. One end of the welding wire passes through the guide sleeve 654 and extends to the ejection end of the welding gun 64. When the ejection end of the welding gun 64 is opposite to the joint line of the chair leg tube, the welding gun 64 heat-melts the end face of the welding wire, and the wire guide wheel 652 is driven by the motor to rotate, and the winding assembly 62 releases the wire. The wire guide wheel 652 guides the welding wire in a direction and transports the welding wire. The worm 633 is driven to rotate by an external motor. When the worm 633 rotates and drives the cutting worm wheel 632 to rotate downward, the winding assembly 62 increases the amount of wire release, thereby preventing the welding wire from being pulled and broken when the cutting worm wheel 632 rotates downward. Similarly, when the cutting worm wheel 632 rotates upward, the winding assembly 62 reduces the amount of wire release, thereby preventing the welding wire from being broken or blocked by the push and pull forces when the base is displaced for welding.

[0055] Sixth embodiment: Figure 4 , Figure 8 As shown, the surface of the lifting plate 251 is fixedly mounted on the surface of the lifting platform 24, the bottom of the semi-cylinder 252 is fixedly mounted on the top of the support platform 23, the quick clamping assembly 25 also includes a rubber sheet 253, the bottom of the rubber sheet 253 is fixedly mounted on the top of the semi-cylinder 252, the inner side of the rubber sheet 253 is fixedly connected with a side pressure arc shell 254, the top of the guide sliding wall 631 is fixedly mounted on the output end of the cylinder 61, the inner side of the guide sliding wall 631 is rotatably connected with a cutting worm gear 632 and a worm 633, and the surface of the cutting worm gear 632 is fixedly connected with a slotted rod 634.

[0056] When in use, a mark is set on the surface of the chair leg tube, and the marked position of the chair leg tube is placed on the inner side of the lifting plate 251. The lifting platform 24 drives the lifting plate 251 to move upward, and the rubber sheet 253 is pushed by the lifting plate 251 to approach the surface of the chair leg tube. The side pressure arc shell 254 on the inner side of the rubber sheet 253 is in direct contact with the surface of the chair leg tube. The width of the upper position of the side pressure arc shell 254 is greater than the width of the lower position. When the rubber sheet 253 is pushed, the side pressure arc shell 254 squeezes the upper position of the surface of the chair leg tube, thereby quickly clamping multiple chair leg tubes, cutting the worm gear 632 and the guide slide There is an opening at the bottom of the wall 631. The cutting worm wheel 632 and the guide sliding wall 631 pass through the chair leg tube when they move downward. There are two worm gears 633, and the two worm gears 633 are symmetrically distributed on both sides of the cutting worm wheel 632. When the worm gear 633 is driven to rotate by the motor, the cutting worm wheel 632 drives the welding gun 64 to rotate. The symmetrically arranged worm gears 633 limit the cutting worm wheel 632. The cutting worm wheel 632 rotates clockwise for a certain angle and then rotates in the opposite direction for a certain angle, thereby firmly welding the chair leg tube to the surface of the fixed sleeve, making the positioning welding of the base more efficient.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. A displacement welding device for an office chair base, comprising a device body (1), a circumferential slide rail (4) being fixedly connected to a position near the middle of the top of the device body (1), and a circumferential slide table (5) being slidably connected to the inner side of the circumferential slide rail (4); characterized in that: Also includes: A chair leg clamping mechanism (2), the surface of the chair leg clamping mechanism (2) being fixedly mounted on the bottom of the inner side surface of the device body (1), and the chair leg clamping mechanism (2) being used for clamping the chair leg tube and guiding the movement of the chair leg tube; A positioning component (3), the upper position of the surface of the positioning component (3) being fixedly mounted at a middle position of the top of the device body (1), the positioning component (3) being used for limiting support of a seat fixing sleeve; The positioning assembly (3) comprises a hydraulic cylinder (31), the bottom of the hydraulic cylinder (31) is fixedly mounted on the top of the device body (1), the output end of the hydraulic cylinder (31) is fixedly connected to an extension rod (32), the lower portion of the surface of the extension rod (32) is fixedly connected to a cylinder body (33), the positioning assembly (3) further comprises a piston rod (34), the upper portion of the surface of the piston rod (34) is slidably connected to the inner side surface of the cylinder body (33), and the lower portion of the surface of the piston rod (34) is fixedly connected to a contraction limit assembly (35); A welding displacement mechanism (6), wherein the upper position of the surface of the welding displacement mechanism (6) is fixedly connected to the inner side surface of the circumferential slide table (5), and the welding displacement mechanism (6) is used for welding the joint line between the chair leg tube and the fixed sleeve and for winding and guiding the welding wire; The welding displacement mechanism (6) comprises a driving component (63), the driving component (63) being arranged below the circumferential slide table (5), a welding gun (64) being fixedly connected to the surface of the driving component (63), a wire feeding component (65) being fixedly connected to the side of the surface of the driving component (63) away from the welding gun (64), the driving component (63) being used for rotating the welding gun (64), and the wire feeding component (65) being used for supporting and guiding the welding wire; The contraction limit assembly (35) comprises a connecting rod (351), one end of the connecting rod (351) is rotatably connected to the surface of the piston rod (34), one end of the connecting rod (351) away from the piston rod (34) is rotatably connected to the limit rod (352), the bottom end of the extension rod (32) is fixedly connected to a supporting sphere (353), and the surface of the limit rod (352) is fixedly connected to an elastic wall (354); The welding displacement mechanism (6) further comprises a cylinder (61), the upper portion of the surface of the cylinder (61) being fixedly mounted on the inner side surface of the circular slide (5), and the output end of the cylinder (61) being rotatably connected to a winding wheel (62); The driving assembly (63) comprises a guide sliding wall (631), the top of the guide sliding wall (631) is fixedly mounted on the output end of the cylinder (61), the inner side surface of the guide sliding wall (631) is rotatably connected to a truncated worm wheel (632) and a worm (633), and the surface of the truncated worm wheel (632) is fixedly connected to a slotted rod (634); The wire feeding assembly (65) comprises a fixed body (651), the surface of the fixed body (651) is fixedly connected to the surface of the slotted rod (634), and a guide wire wheel (652) is rotatably connected to the lower position of the inner side surface of the fixed body (651); The wire feeding assembly (65) further comprises a position changing platform (653), the upper portion of the surface of the position changing platform (653) being fixedly mounted at the lower portion of the surface of the fixed body (651), and the bottom of the position changing platform (653) being fixedly connected to a guide sleeve (654).

2. The position-changing welding equipment for an office chair base according to claim 1 is characterized in that: The chair leg clamping mechanism (2) comprises a screw slide (21), the surface of the screw slide (21) being fixedly mounted on the bottom of the inner side surface of the device body (1), and a guide plate (22) being fixedly connected to the top of the screw slide (21) near the edge.

3. The position-changing welding equipment for an office chair base according to claim 2 is characterized in that: The chair leg clamping mechanism (2) further comprises a support platform (23), the bottom of the support platform (23) being fixedly mounted on the output end of the screw slide (21), a lifting platform (24) being fixedly connected to the middle of the surface of the support platform (23), and a quick clamping assembly (25) being fixedly connected to the top of the support platform (23).

4. The position-changing welding equipment for an office chair base according to claim 3 is characterized in that: The quick clamping assembly (25) comprises a lifting plate (251) and a semi-cylinder (252), wherein the surface of the lifting plate (251) is fixedly mounted on the surface of the lifting platform (24), and the bottom of the semi-cylinder (252) is fixedly mounted on the top of the support platform (23).

5. The position-changing welding equipment for the base of an office chair according to claim 4, characterized in that: The quick clamping assembly (25) further comprises a rubber sheet (253), the bottom of the rubber sheet (253) being fixedly mounted on the top of the semi-cylinder (252), and the inner side surface of the rubber sheet (253) being fixedly connected to a side pressure arc shell (254).

Images