Laser welding mechanical arm

Abstract

The utility model relates to the technical field of welding robots, in particular to a laser welding mechanical arm which comprises a bottom box body, a mechanical arm body with the bottom arranged on the top face of the bottom box body and a laser welding gun assembled at the working end of the mechanical arm body, and one end of a platform is supported between the top face of the bottom box body and the bottom of the mechanical arm body. The shaft seat is fixed to the middle of the top face of the end, away from the bottom box, of the platform. The circle center of the rotating support is arranged above the shaft seat, and a plurality of clamping grooves extending in the radial direction are formed in the outer edge of the rotating support in the circumferential direction. A servo motor rack is fixed to the middle of the rotating support, and a power output shaft of a servo motor is fixedly connected with the shaft seat in a sleeved mode in the vertical direction. The positioning assembly comprises a plurality of top discs movably arranged on the bottom face of the clamping groove in a sleeving mode and a telescopic cylinder arranged on the lower side of the outer edge of the rotating support and used for driving the top discs to vertically move. The problem that a laser welding mechanical arm is inconvenient to apply to efficient welding machining of an assembly line is well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding robots, in particular to a laser welding mechanical arm. Background Art

[0002] A robotic arm is a complex system characterized by high precision, multiple inputs and outputs, high nonlinearity, and strong coupling. Due to its unique operational flexibility, it has been widely used in industrial assembly, safety, and explosion-proofing. A laser welding robotic arm is a robotic arm whose actuating end is the laser welding assembly.

[0003] At present, most commonly used laser welding robot arms are set up separately and require additional configuration of fixtures for fixing the workpiece, which makes it difficult to apply them to efficient operations on the assembly line. Utility Model Content

[0004] The purpose of the utility model is to provide a laser welding robot arm, which is used to solve the problem that the current laser welding robot arm is inconvenient to be used in assembly line efficient welding processing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a laser welding robot arm, comprising a bottom box body, a robot arm whose bottom is arranged on the top surface of the bottom box body, and a laser welding gun assembled on the working end of the robot arm, one end of the platform is supported between the top surface of the bottom box body and the bottom of the robot arm; the shaft seat is fixed to the middle of the top surface of one end of the platform away from the bottom box body; the center of the circle of the rotating bracket is arranged above the shaft seat, and the outer edge of the rotating bracket is provided with a plurality of slots extending radially respectively along the circumferential direction; the servo motor frame is fixed to the middle of the rotating bracket and the power output shaft of the servo motor is fixedly sleeved with the shaft seat along the vertical direction; the positioning assembly includes a plurality of top plates movably sleeved on the bottom surface of the slot and a telescopic cylinder provided on the lower side of the outer edge of the rotating bracket and used to drive the top plate to move vertically.

[0006] Preferably, the rotating bracket includes a vertical shaft, an annular frame arranged on the periphery of the vertical shaft, and a connecting plate radially fixed between the annular frame and the vertical shaft. The bottom end of the servo motor frame is fixedly connected to the top surface of the vertical shaft. The center of the vertical shaft is provided with an axial hole that matches the rotational sleeve of the servo motor power output shaft, and the card slots are evenly arranged on the annular frame along the circumference.

[0007] Preferably, a supporting leg is fixed to the bottom surface of the other end of the platform.

[0008] Preferably, the platform is provided with a groove at a position corresponding to the annular frame.

[0009] Preferably, the shaft seat includes a base plate fixedly connected to the top surface of the platform using bolts and a shaft sleeve fixed to the middle of the top surface of the base plate, and the shaft sleeve is fixedly sleeved with the power output shaft of the servo motor.

[0010] Preferably, a slewing bearing is provided on the top surface of the platform at a position outside the shaft seat, and the fixed outer ring of the slewing bearing is fixedly connected to the top surface of the platform by bolts, and the connecting plate is provided with a through-hole corresponding to the position of the rotating inner ring of the slewing bearing, and the bottom end of the bolt inserted in the through-hole is threadedly sleeved on the rotating inner ring of the slewing bearing, and the rotating inner ring of the slewing bearing is higher than the fixed outer ring.

[0011] Preferably, a circular groove is provided in the middle of the bottom surface of the slot to be sleeved and matched with the top plate, and a sleeve hole is provided in the middle of the circular groove to be slidably sleeved and matched with the piston rod of the telescopic cylinder.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model relates to a laser welding robot arm. When in use, a tray holding a workpiece to be welded is positioned and placed by a card slot, and a servo motor drives a rotating bracket to rotate as a whole, so as to transfer the workpiece to be welded to the laser welding station in sequence. The three processes of removing the welded workpiece, loading the workpiece to be welded into the card slot, and laser welding can be carried out simultaneously without interfering with each other, thereby facilitating the application of the laser welding robot arm in the efficient welding process of the assembly line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional structure of the axle seat of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the rotating bracket of the utility model;

[0017] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning component of the utility model.

[0018] In the figure: 1-Robotic arm;

[0019] 2-Laser welding gun;

[0020] 3-Bottom box;

[0021] 4-Platform; 4.1-Legs; 4.2-Groove;

[0022] 5-Axle seat; 5.1-Base plate; 5.2-Axle sleeve;

[0023] 6-rotating bracket; 6.1-vertical axis; 6.1.1-axial hole; 6.2-annular frame; 6.2.1-slot; 6.2.2-circular groove; 6.2.3-hole; 6.3-connecting plate; 6.3.1-perforation;

[0024] 7-Servo motor;

[0025] 8-positioning assembly; 8.1-telescopic cylinder; 8.2-top plate;

[0026] 9-Slewing bearing. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-4 The present invention provides a technical solution: a laser welding robot arm comprising a bottom housing 3, a robot arm 1 with its bottom portion positioned on the top surface of the bottom housing 3, and a laser welding gun 2 mounted on the working end of the robot arm 1. One end of a platform 4 is supported between the top surface of the bottom housing 3 and the bottom of the robot arm 1; to enhance the support strength of the platform 4, a support leg 4.1 is fixed to the bottom surface of the other end of the platform 4.

[0029] The shaft seat 5 is fixed to the middle of the top surface of one end of the platform 4 away from the bottom box 3. The shaft seat 5 includes a bottom plate 5.1 fixedly connected to the top surface of the platform 4 with bolts and a shaft sleeve 5.2 fixed to the middle of the top surface of the bottom plate 5.1.

[0030] The center of the rotating bracket 6 is located above the shaft seat 5. The outer edge of the rotating bracket 6 is circumferentially provided with a plurality of radially extending slots 6.2.1. The rotating bracket 6 comprises a vertical shaft 6.1, an annular frame 6.2 disposed around the vertical shaft 6.1, and a connecting plate 6.3 radially fixed between the annular frame 6.2 and the vertical shaft 6.1. The slots 6.2.1 are evenly distributed along the circumference of the annular frame 6.2. A circular groove 6.2.2 is located in the middle of the bottom surface of the slot 6.2.1, and a sleeve hole 6.2.3 is located in the middle of the circular groove 6.2.2.

[0031] The bottom end of the servo motor 7 frame is fixedly connected to the top surface of the vertical shaft 6.1 by bolts. The center of the vertical shaft 6.1 is provided with an axis hole 6.1.1 that is rotatably connected to the power output shaft of the servo motor 7. The bottom end of the power output shaft of the servo motor 7 is fixedly connected to the shaft sleeve 5.2.

[0032] The positioning assembly 8 comprises a plurality of top plates 8.2 that are movably mounted within the circular grooves 6.2.2, and a telescopic cylinder 8.1, located on the underside of the outer edge of the rotating bracket 6 and used to drive the vertical movement of the top plates 8.2. The top end of the piston of the telescopic cylinder 8.1 is fixed to the bottom surface of the annular bracket 6.2, corresponding to the position of the circular grooves 6.2.2. The telescopic rod of the telescopic cylinder 8.1 is slidably engaged with the sleeve hole 6.2.3, and the top end of the telescopic rod of the telescopic cylinder 8.1 is fixed to the bottom surface of the top plate 8.2.

[0033] In summary, the workpiece to be welded is clamped and fixed on the pallet, which is radially engaged with the slot 6.2.1. This engagement between the pallet and the slot 6.2.1 allows the workpiece to be positioned. The piston rod of the telescopic cylinder 8.1 is extended, causing the top plate 8.2 to press against the bottom surface of the pallet, thereby firmly positioning the workpiece to be welded.

[0034] Driven by servo motor 7, the entire rotating bracket 6 performs a circular motion relative to the shaft base 5, sequentially transferring the workpieces to be welded to the workstations of robotic arm 1 and laser welding gun 2 for laser welding. Simultaneously, the welded workpieces, along with the pallet, can be removed from the corresponding slots 6.2.1 on the side of the ring bracket 6.2 away from the robotic arm 1. The remaining pallets holding the workpieces to be welded can also be inserted into the corresponding slots 6.2.1 simultaneously. These three processes can be performed simultaneously without interfering with each other, making the laser welding robot arm suitable for efficient welding processes on an assembly line.

[0035] Among them, in order to facilitate the power supply for the servo motor 7 and the telescopic cylinder 8.1, the telescopic cylinder 8.1 is an electric telescopic cylinder, and a rechargeable new energy battery is fixed on the annular frame 6.2, and the new energy battery is used to power the servo segment set 7 and the telescopic cylinder 8.1.

[0036] In order to facilitate the telescopic cylinder 8.1 to rotate through the platform 4 with the annular frame 6.2, a groove 4.2 is fixed to the platform 4 at a position corresponding to the annular frame 6.2. That is, when the annular frame 6.2 rotates, the telescopic cylinder 8.1 passes over the platform 4 from the groove 4.2.

[0037] In order to improve the supporting strength of the rotating bracket 6 and ensure the smooth rotation of the rotating bracket 6, a slewing bearing 9 is provided on the top surface of the platform 4 at the outer periphery of the shaft seat 5. The fixed outer ring of the slewing bearing 9 is fixedly connected to the top surface of the platform 4 with bolts. The connecting plate 6.3 is provided with a through-hole 6.3.1 at the position corresponding to the rotating inner ring of the slewing bearing 9. The bottom end of the bolt set in the through-hole 6.3.1 is threadedly sleeved on the rotating inner ring of the slewing bearing 9. The rotating inner ring of the slewing bearing 9 is higher than the fixed outer ring.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] 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 laser welding robot arm, comprising a bottom box (3), a robot arm (1) with its bottom portion arranged on the top surface of the bottom box (3), and a laser welding gun (2) mounted on the working end of the robot arm (1), characterized in that: Also includes: A platform (4), one end of the platform (4) is supported between the top surface of the bottom box (3) and the bottom of the robotic arm (1); An axle seat (5), the axle seat (5) being fixed to the middle portion of the top surface of one end of the platform (4) away from the bottom box (3); A rotating bracket (6), wherein the center of the rotating bracket (6) is located above the shaft seat (5), and the outer edge of the rotating bracket (6) is provided with a plurality of slots (6.2.1) extending in radial directions along the circumferential direction; A servo motor (7), wherein the servo motor (7) frame is fixed to the middle of the rotating bracket (6) and the power output shaft of the servo motor (7) is fixedly sleeved with the shaft seat (5) in the vertical direction; A positioning assembly (8) includes a plurality of top plates (8.2) movably mounted on the bottom surface of the card slot (6.2.1) and a telescopic cylinder (8.1) disposed on the lower side of the outer edge of the rotating bracket (6) and used to drive the top plates (8.2) to move vertically.

2. A laser welding robot arm according to claim 1, characterized in that: The rotating bracket (6) comprises a vertical shaft (6.1), an annular frame (6.2) arranged on the periphery of the vertical shaft (6.1), and a connecting plate (6.3) fixed radially between the annular frame (6.2) and the vertical shaft (6.1); the bottom end of the servo motor (7) frame is fixedly connected to the top surface of the vertical shaft (6.1); the center of the vertical shaft (6.1) is provided with an axial hole (6.3) for rotating and sleeve-matching with the power output shaft of the servo motor (7) 6.1.1), the clamping grooves (6.2.1) are evenly arranged on the annular frame (6.2) along the circumferential direction.

3. The laser welding robot arm according to claim 1, characterized in that: A supporting leg (4.1) is fixed to the bottom surface of the other end of the platform (4).

4. The laser welding robot arm according to claim 2, characterized in that: The platform (4) is provided with a groove (4.2) at a position corresponding to the annular frame (6.2).

5. The laser welding robot arm according to claim 1, characterized in that: The shaft seat (5) comprises a base plate (5.1) fixedly connected to the top surface of the platform (4) by means of bolts, and a shaft sleeve (5.2) fixed to the middle of the top surface of the base plate (5.1); the shaft sleeve (5.2) is fixedly sleeved with the power output shaft of the servo motor (7).

6. The laser welding robot arm according to claim 2, characterized in that: The top surface of the platform (4) is provided with a slewing bearing (9) at a position outside the shaft seat (5). The fixed outer ring of the slewing bearing (9) is fixedly connected to the top surface of the platform (4) by bolts. The connecting plate (6.3) is provided with a through hole ( 6.3.1), the bottom end of the bolt set in the through hole (6.3.1) is threadedly sleeved on the rotating inner ring of the slewing bearing (9), and the rotating inner ring of the slewing bearing (9) is higher than the fixed outer ring.

7. The laser welding robot arm according to claim 2, characterized in that: A circular groove (6.2.2) is provided in the middle of the bottom surface of the clamping groove (6.2.1) and is sleeved and matched with the top plate (8.2). A sleeve hole (6.2.3) is provided in the middle of the circular groove (6.2.2) and is slidably sleeved and matched with the piston rod of the telescopic cylinder (8.1).

Images