Welding fixture for welding robot

Abstract

The utility model discloses a welding fixture for a welding robot, which comprises a bottom frame, and a support plate is provided with an avoiding hole for the welding robot to weld; through the design of a first driving motor, a rotating rod, a supporting plate and a transmission mechanism, the transmission mechanism can drive a moving seat and an adjusting plate to move at the same time, so that the moving seat and the adjusting plate drive a positioning seat and a push plate to move when driving at the same time, the positioning seat and the push plate can clamp and fix a workpiece, and the workpiece clamping efficiency can be improved; the first driving motor, the rotating rod and the supporting plate are matched, so that a clamped workpiece can be overturned and adjusted, a welding robot can weld the position, needing to be welded, of the bottom of the workpiece through the receding hole, and the welding efficiency of the workpiece can be improved; when the bottom of a workpiece is welded, the workpiece does not need to be disassembled and readjusted, and the welding efficiency of the workpiece can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding fixtures, in particular to a welding fixture used for a welding robot. Background Art

[0002] Automatic welding robots are becoming increasingly common in workpiece welding. By using the automatic welding robot in conjunction with a welding fixture, the welding fixture clamps the workpiece to be welded, and then the automatic welding robot welds the workpiece to be welded.

[0003] The prior art provides a welding fixture for an automatic welding robot (Announcement No. CN216858759U), which includes a base plate and a hinge seat. The upper surface of the base plate is fixedly connected to a mounting plate. A groove is provided inside the hinge seat. A shaft cylinder is installed inside the groove. A first insertion shaft is provided at both ends of the shaft cylinder. The first insertion shaft passes through the hinge seat. The side surface of the shaft cylinder is fixedly connected to a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are in a "V" shape. The utility model provides a rotatable shaft cylinder. When in use, the workpiece to be welded is placed on the base plate, and the second connecting rod is rotated so that the limiting stud slides along the track in the slot. Due to the lever-type design, the first connecting rod at the other end is pressed downward, and the movable limiting pressure plate squeezes and limits the workpiece to be welded to prevent deviation, which is convenient for welding. At this time, after the limiting pressure plate presses the workpiece tightly, a limiting nut is used to fix the position of the second connecting rod at this time.

[0004] The above-mentioned welding fixture for automatic welding robots can only clamp and fix the workpiece during actual use. However, after welding the upper surface or side of the workpiece, when it is necessary to weld the bottom of the workpiece, it is necessary to manually remove the bolts and disassemble the workpiece and readjust it before continuing to weld the workpiece. The installation and fixation of the workpiece are troublesome, which reduces the welding efficiency of the workpiece. Therefore, we need to propose a welding fixture for a welding robot. Utility Model Content

[0005] The purpose of the present utility model is to provide a welding fixture for a welding robot, which can improve the welding efficiency of the workpiece by rotating and adjusting the workpiece so that the workpiece does not need to be disassembled and readjusted when welding the bottom of the workpiece, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A welding fixture for a welding robot comprises a base frame, a support plate provided on the base frame, a rotating rod fixedly connected to both sides of the support plate, the rotating rod being rotatably mounted within the base frame, a first drive motor fixedly mounted on a side of the base frame, and an output shaft of the first drive motor fixedly connected to a set of rotating rods via a coupling;

[0008] A workpiece is arranged on the top of the support plate, a transmission mechanism is arranged inside the support plate, multiple groups of movable seats and multiple groups of adjustment plates are arranged on the transmission mechanism, multiple groups of positioning seats for fixing the workpiece are fixedly installed on the sides of the multiple groups of movable seats, a push plate for fixing the workpiece is fixedly installed on the top of the adjustment plate, and avoidance holes for welding by welding robots are opened on the support plate.

[0009] Preferably, a bracket is fixedly connected to the side of the base frame, and a driving mechanism for driving the transmission mechanism is provided on the bracket. The driving mechanism includes a cylinder, a mounting seat, a second driving motor, a connecting rod and a tapered plug. The cylinder is fixedly mounted on the side of the bracket, the mounting seat is fixedly mounted on the telescopic end of the cylinder, the second driving motor is fixedly mounted on the mounting seat, the connecting rod is fixedly connected to the output shaft of the second driving motor through a coupling, and the tapered plug is fixedly connected to the end of the connecting rod.

[0010] Preferably, the transmission mechanism includes a bidirectional screw, a first adjusting screw, a second adjusting screw, a first bevel gear and a second bevel gear, the bidirectional screw, the first adjusting screw and the second adjusting screw are all movably mounted in the support plate, and the movable seat and the adjusting plate are each provided with two groups, one group of the movable seat is threadedly mounted on the first adjusting screw, and the other group of the movable seat is threadedly mounted on the second adjusting screw, one group of the adjusting plate is threadedly mounted on the left-handed thread of the bidirectional screw, and the other group of the adjusting plate is threadedly mounted on the right-handed thread of the bidirectional screw.

[0011] Preferably, the first bevel gear is fixedly connected to the bidirectional screw, the second bevel gear is fixedly connected to the ends of the first adjusting screw and the second adjusting screw, and the second bevel gear is meshed with the first bevel gear.

[0012] Preferably, both ends of the bidirectional screw rod are fixedly connected to a fixing seat, and multiple groups of the fixing seats are provided with a plug-in groove adapted to the tapered plug block.

[0013] Preferably, a plurality of groups of blocks for blocking the workpiece are provided on the top of the support plate, and the side portions of the workpiece are in contact with the blocks.

[0014] Preferably, a plurality of positioning rods are fixedly connected to the support plate, and the movable seat is slidably mounted on the positioning rods.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Through the design of the first drive motor, the rotating rod, the support plate and the transmission mechanism, the transmission mechanism can simultaneously drive the movable seat and the adjustment plate to move, so that when the movable seat and the adjustment plate are driven at the same time, the positioning seat and the push plate are driven to move, so that the positioning seat and the push plate can clamp and fix the workpiece, which can improve the workpiece clamping efficiency. Through the cooperation of the first drive motor, the rotating rod and the support plate, the clamped workpiece can be flipped and adjusted, so that the welding robot can weld the required welding position on the bottom of the workpiece through the avoidance hole, thereby improving the welding efficiency of the workpiece. The utility model can improve the welding efficiency of the workpiece by adjusting the workpiece rotation, so that when welding the bottom of the workpiece, there is no need to disassemble the workpiece and readjust it, which can improve the welding efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is one of the partial structural diagrams of the utility model;

[0019] Figure 3 This is the second schematic diagram of the structure of a part of the utility model.

[0020] In the figure: 1. base frame; 2. workpiece; 3. support plate; 4. rotating rod; 5. first drive motor; 6. bidirectional screw; 7. fixed seat; 8. plug-in slot; 9. first adjusting screw; 10. second adjusting screw; 11. movable seat; 12. push plate; 13. positioning rod; 14. conical plug block; 15. positioning seat; 16. first bevel gear; 17. second bevel gear; 18. adjusting plate; 19. connecting rod; 20. avoidance hole; 21. bracket; 22. cylinder; 23. mounting seat; 24. second drive motor; 25. stop block. DETAILED DESCRIPTION

[0021] 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 embodiments described 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 creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-3 , the utility model provides a technical solution:

[0023] A welding fixture for a welding robot includes a base frame 1, a support plate 3 is provided on the base frame 1, and a rotating rod 4 is fixedly connected to both sides of the support plate 3. The rotating rod 4 is rotatably mounted within the base frame 1. A first drive motor 5 is fixedly mounted on the side of the base frame 1, and the output shaft of the first drive motor 5 is fixedly connected to a set of rotating rods 4 through a coupling;

[0024] It should be noted that the first drive motor 5 is configured as a servo motor with a brake, thereby preventing the conveying shaft of the first drive motor 5 from rotating and driving the support plate 3 to rotate after power failure, causing the position of the workpiece 2 to shift, thereby affecting the welding work of the workpiece 2.

[0025] A workpiece 2 is arranged on the top of the support plate 3, and a transmission mechanism is arranged inside the support plate 3. Multiple groups of movable seats 11 and multiple groups of adjustment plates 18 are provided on the transmission mechanism. Multiple groups of positioning seats 15 for fixing the workpiece are fixedly installed on the sides of the multiple groups of movable seats 11. A push plate 12 for fixing the workpiece 2 is fixedly installed on the top of the adjustment plate 18. An avoidance hole 20 for welding by a welding robot is opened on the support plate 3.

[0026] In an optional embodiment: a bracket 21 is fixedly connected to the side of the base frame 1, and a driving mechanism for driving the transmission mechanism is provided on the bracket 21, the driving mechanism includes a cylinder 22, a mounting seat 23, a second driving motor 24, a connecting rod 19 and a conical plug block 14, the cylinder 22 is fixedly mounted on the side of the bracket 21, the mounting seat 23 is fixedly mounted on the telescopic end of the cylinder 22, the second driving motor 24 is fixedly mounted on the mounting seat 23, the connecting rod 19 is fixedly connected to the output shaft of the second driving motor 24 through a coupling, and the conical plug block 14 is fixedly connected to the end of the connecting rod 19.

[0027] In an optional embodiment: the transmission mechanism includes a bidirectional screw 6, a first adjusting screw 9, a second adjusting screw 10, a first bevel gear 16 and a second bevel gear 17, the bidirectional screw 6, the first adjusting screw 9 and the second adjusting screw 10 are all movably installed in the support plate 3, and the movable seat 11 and the adjusting plate 18 are each provided with two groups, one group of movable seats 11 is threadedly installed on the first adjusting screw 9, and the other group of movable seats 11 is threadedly installed on the second adjusting screw 10, one group of adjusting plates 18 is threadedly installed on the left-handed thread of the bidirectional screw 6, and the other type of adjusting plate 18 is threadedly installed on the right-handed thread of the bidirectional screw 6.

[0028] It should be noted that the thread directions on the first adjusting screw 9 and the second adjusting screw 10 are opposite. When the bidirectional screw 6 is driven to rotate by the second drive motor 24, the connecting rod 19, the plug-in slot 8 and the conical plug block 14, the first adjusting screw 9 and the second adjusting screw 10 can be driven to rotate at the same time through the second bevel gear 17 and the first bevel gear 16. The adjusting plate 18 and the movable seat 11 are driven to move through the bidirectional screw 6, the first adjusting screw 9 and the second adjusting screw 10, so that the push plate 12 and the positioning seat 15 can clamp the workpiece 2 tightly on the stop block 25, thereby fixing the workpiece 2.

[0029] In an optional embodiment: the first bevel gear 16 is fixedly connected to the bidirectional screw 6, the second bevel gear 17 is fixedly connected to the ends of the first adjusting screw 9 and the second adjusting screw 10, and the second bevel gear 17 is meshed with the first bevel gear 16.

[0030] In an optional embodiment, both ends of the bidirectional screw rod 6 are fixedly connected to the fixing seats 7 , and multiple groups of fixing seats 7 are provided with plug-in slots 8 that are compatible with the tapered plug blocks 14 .

[0031] It should be noted that, after the support plate 3 is flipped over and the welding robot passes through the avoidance hole 20 to weld the connection of the workpiece 2, the cylinder 22 is started, and the telescopic rod of the cylinder 22 pushes the mounting seat 23, so that the mounting seat 23 drives the tapered plug 14 to move, so that the tapered plug 14 is inserted into the insertion groove 8, and the second drive motor 24 is started, so that the second drive motor 24 drives the bidirectional screw rod 6, the first adjusting screw rod 9 and the second adjusting screw rod 10 to rotate, so that the bidirectional screw rod 6, the first adjusting screw rod 9 and the second adjusting screw rod 10 rotate and drive the push plate 12 and the positioning seat 15 away from the workpiece 2, so that the workpiece 2 can fall from the support plate 3 and be collected on the top of the base frame 1;

[0032] In an optional embodiment, a plurality of groups of stoppers 25 for blocking the workpiece 2 are provided on the top of the support plate 3 , and the side of the workpiece 2 contacts the stoppers 25 .

[0033] It should be noted that the workpiece 2 can be positioned by the stopper 25, so that the push plate 12 and the positioning seat 15 can clamp the workpiece 2 tightly on the stopper 25 to fix the workpiece 2, so as to prevent the workpiece 2 from shaking and displacing during subsequent welding of the workpiece 2.

[0034] In an optional embodiment, a plurality of positioning rods 13 are fixedly connected to the support plate 3 , and the movable seat 11 is slidably mounted on the positioning rods 13 .

[0035] It should be noted that, by providing the positioning rod 13 , the movable base 11 can be positioned so that the movable base 11 can move stably.

[0036] When in use, first place the workpiece on the top of the support plate 3, make the side of the workpiece 2 contact with the side of the stop block 25, start the second drive motor 24, and the output shaft of the second drive motor 24 rotates to drive the connecting rod 19 to rotate, so that when the connecting rod 19 rotates, the conical plug block 14 is driven to rotate, so that when the conical plug block 14 rotates, it drives the bidirectional screw rod 6 to rotate through the plug-in slot 8 and the fixed seat 7, so that when the bidirectional screw rod 6 rotates, the second conical gear 17 that meshes with the first conical gear 16 drives the first adjusting screw rod 9 and the second adjusting screw rod 10 to rotate, and when the bidirectional screw rod 6 rotates, it can drive the adjusting plate 18 on the left-hand thread and the right-hand thread to approach the workpiece 2, so that the adjusting plate 18 can clamp and fix the workpiece 2. At the same time, when the first adjusting screw rod 9 and the second adjusting screw rod 10 rotate, they can drive the moving seat 11 to approach each other, so that the moving seat 11 can drive the positioning seat 15 to approach the workpiece 2 through the push plate 12, so that the positioning seat 15 clamps and fixes the workpiece 2. At this time, the welding robot can weld the connection between the workpieces 2;

[0037] When it is necessary to weld the bottom of the workpiece 2, the telescopic rod of the cylinder 22 retracts to drive the mounting base 23 to move, so that the mounting base 23 can be pulled out of the conical plug block 14 from the insertion slot 8 during the movement, and the first drive motor 5 is started. When the output shaft of the first drive motor 5 rotates, it cooperates with the rotating rod 4 to drive the support plate 3 to rotate and flip. When the support plate 3 rotates, the avoidance hole 20 can be directed upward. At this time, the welding robot can weld the connection of the workpiece 2 through the avoidance hole 20.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a welding robot, comprising a base frame (1), characterized in that: A support plate (3) is provided on the base frame (1), and rotating rods (4) are fixedly connected to both sides of the support plate (3), and the rotating rods (4) are rotatably installed in the base frame (1). A first drive motor (5) is fixedly installed on the side of the base frame (1), and the output shaft of the first drive motor (5) is fixedly connected to a set of rotating rods (4) through a coupling; A workpiece (2) is arranged on the top of the support plate (3), a transmission mechanism is arranged inside the support plate (3), and multiple groups of moving seats (11) and multiple groups of adjustment plates (18) are arranged on the transmission mechanism. Multiple groups of positioning seats (15) for fixing the workpiece are fixedly installed on the sides of the multiple groups of moving seats (11), and a push plate (12) for fixing the workpiece (2) is fixedly installed on the top of the adjustment plate (18). An avoidance hole (20) for welding by a welding robot is opened on the support plate (3).

2. A welding fixture for a welding robot according to claim 1, characterized in that: The side of the base frame (1) is fixedly connected to a bracket (21), and a driving mechanism for driving a transmission mechanism is provided on the bracket (21), and the driving mechanism includes a cylinder (22), a mounting seat (23), a second driving motor (24), a connecting rod (19) and a tapered plug (14). The cylinder (22) is fixedly mounted on the side of the bracket (21), the mounting seat (23) is fixedly mounted on the telescopic end of the cylinder (22), the second driving motor (24) is fixedly mounted on the mounting seat (23), the connecting rod (19) is fixedly connected to the output shaft of the second driving motor (24) through a coupling, and the tapered plug (14) is fixedly connected to the end of the connecting rod (19).

3. A welding fixture for a welding robot according to claim 2, characterized in that: The transmission mechanism comprises a bidirectional screw (6), a first adjusting screw (9), a second adjusting screw (10), a first bevel gear (16) and a second bevel gear (17); the bidirectional screw (6), the first adjusting screw (9) and the second adjusting screw (10) are all movably mounted in the support plate (3); the movable seat (11) and the adjusting plate (18) are both provided with two groups, one group of the movable seat (11) is threadedly mounted on the first adjusting screw (9), and the other group of the movable seat (11) is threadedly mounted on the second adjusting screw (10); one group of the adjusting plates (18) is threadedly mounted on the left-handed thread of the bidirectional screw (6), and the other group of the adjusting plates (18) is threadedly mounted on the right-handed thread of the bidirectional screw (6).

4. The welding fixture for a welding robot according to claim 3, characterized in that: The first bevel gear (16) is fixedly connected to the bidirectional screw (6), the second bevel gear (17) is fixedly connected to the ends of the first adjusting screw (9) and the second adjusting screw (10), and the second bevel gear (17) is meshed with the first bevel gear (16).

5. The welding fixture for a welding robot according to claim 3, characterized in that: Both ends of the bidirectional screw rod (6) are fixedly connected to a fixing seat (7), and multiple groups of the fixing seats (7) are provided with a plug-in slot (8) adapted to the tapered plug block (14).

6. The welding fixture for a welding robot according to claim 1, characterized in that: A plurality of groups of stoppers (25) for blocking the workpiece (2) are provided on the top of the support plate (3), and the side of the workpiece (2) is in contact with the stoppers (25).

7. The welding fixture for a welding robot according to claim 2, characterized in that: A plurality of positioning rods (13) are fixedly connected inside the support plate (3), and the movable seat (11) is slidably mounted on the positioning rods (13).

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