Robot clamp for welding forklift oil tank

Abstract

The utility model discloses a robot clamp for welding a forklift oil tank. The robot clamp comprises a mounting bracket, the suction cup assembly is arranged on the side edge of the mounting bracket and is provided with an electromagnetic suction cup; and the clamping jaw assembly is arranged on the bottom surface of the mounting bracket, the clamping jaw assembly is provided with a telescopic clamping piece, a clamping surface is formed on the clamping piece, and the clamping surface is parallel to the working end surface of the electromagnetic chuck. The electromagnetic chuck is arranged to grab a plate for welding an oil tank, and the robot moves the plate to a welding position by moving the electromagnetic chuck. And secondly, the clamping jaw assembly is further arranged and used for carrying the welded oil tank, the clamping piece can stably clamp the side wall of the oil tank under driving of the pneumatic clamping jaw, the robot can carry the oil tank to the next production station of the forklift oil tank by driving the clamping jaw assembly, the forklift oil tank is prevented from falling in the carrying process, and the accident rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of robot clamps, and in particular to a robot clamp for welding a forklift oil tank. Background Art

[0002] The manufacturing process of forklift fuel tanks is material preparation, sheet material cutting, stamping, welding assembly, and cleaning and inspection. Stamping is the use of stamping equipment to stamp the sheet material to form the upper and lower shells and other parts of the fuel tank. Welding assembly is the use of electric welding machines, argon arc welding machines, etc. to weld the stamped parts into a complete fuel tank. The fuel tanks produced by the factory where the inventor of this application works are as shown in the attached Figure 1 The shape shown is irregular, so the stamped sheet is mostly irregular, and the welded and assembled fuel tank is irregular in shape and heavy. The existing forklift fuel tank automatic welding production line is handled by a handling robot, where the handling robot's fixture is a pneumatic suction cup or an electromagnetic suction cup. Such suction cups can absorb the stamped fuel tank parts, but are limited by their low power. When absorbing the complete welded fuel tank, the suction capacity is insufficient, which can easily cause the fuel tank to fall and cause production accidents. Utility Model Content

[0003] The utility model provides a robot fixture for welding forklift fuel tanks to solve the manufacturing problem of irregular and heavy forklift fuel tanks. The specific technical solution is as follows:

[0004] A robot fixture for welding a forklift oil tank comprises: a mounting bracket; a suction cup assembly arranged on the side of the mounting bracket, the suction cup assembly being provided with an electromagnetic suction cup; a clamping claw assembly arranged on the bottom surface of the mounting bracket, the clamping claw assembly being provided with a retractable clamping member, the clamping member being formed with a clamping surface, and the clamping surface being parallel to an operating end surface of the electromagnetic suction cup.

[0005] Preferably, the suction cup assembly also includes a buffer member with one end arranged on the side of the mounting bracket, the buffer member is formed with a structure that can absorb impact by compression, and the direction of the elastic force generated by the buffer member is perpendicular to the working end face of the electromagnetic suction cup. The suction cup assembly also includes: a suction cup mounting bracket 1 connected to the side of the mounting bracket; a suction cup mounting bracket 2 parallel to the suction cup mounting bracket 1, the electromagnetic suction cup is arranged on the side of the suction cup mounting bracket 2 away from the suction cup mounting bracket 1, the opposite surfaces of the suction cup mounting bracket 2 and the suction cup mounting bracket 1 are connected to both ends of the buffer member, and at least a part of the component force direction of the elastic force generated by the buffer member is perpendicular to the suction cup mounting bracket 1; and a proximity sensor arranged on the same side of the suction cup mounting bracket 2 and the electromagnetic suction cup.

[0006] Furthermore, the clamping member includes a pneumatic clamping member, which can drive the clamping member to perform telescopic movement. The plane swept by the clamping member during the telescopic movement is the clamping surface. The clamping member includes: a first clamping member arranged at one end of the pneumatic clamping member movement structure; a second clamping member arranged at the other end of the pneumatic clamping member movement structure; and the second clamping member and the first clamping member can approach or move away from each other under the drive of the pneumatic clamping member, that is, the clamping member performs telescopic movement, the first clamping member bends toward the direction of the second clamping member, and a pressure plate is formed on the end face of the bent portion of the first clamping member facing the second clamping member.

[0007] Preferably, the utility model further comprises a robot and an oil tank, wherein the working end of the robot is connected to the top surface of the mounting bracket, and the working end of the robot can drive the suction cup assembly and the clamping claw assembly to assemble and carry the oil tank through the mounting bracket.

[0008] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0009] The utility model grabs the plate of the welding oil tank by setting an electromagnetic suction cup, and the robot moves the plate to the welding position by moving the electromagnetic suction cup. Secondly, a clamping claw assembly is also provided for carrying the welded oil tank. The clamping part can firmly clamp the side wall of the oil tank under the drive of the pneumatic clamping claw, so that the robot can carry the oil tank to the next production station of the forklift oil tank by driving the clamping claw assembly, avoiding the forklift oil tank from falling during the transportation process and reducing the accident rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the forklift fuel tank structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure without a robot in an embodiment of the utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the suction cup assembly of the utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the clamping jaw assembly of the utility model;

[0014] Figure 5 It is a schematic diagram of the structure of an embodiment of the utility model.

[0015] In the figure: 1. Robotic arm, 2. Mounting bracket, 3. Suction cup assembly, 4. Gripper assembly, 5. Fuel tank;

[0016] 21. Mounting plate, 22. Lateral mounting tube, 31. Suction cup mounting bracket 1, 32. Buffer, 33. Electromagnetic suction cup, 34. Proximity sensor, 35. Suction cup mounting bracket 2, 41. Pneumatic clamp, 42. Clamping member, 43. Photoelectric sensor, 421. First clamp, 422. Second clamp, 423. Pressure plate, 424. Clamping surface. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 and Figure 5 As shown, the fuel tank 5 targeted by the present invention is of irregular shape. FIG. a is an outer wall plate of the fuel tank 5, and FIG. b is a schematic diagram of the interior of the fuel tank 5 after being cut open. Figure 1 It can be seen that the types and quantities of plates constituting the oil tank 5 are relatively large, and the electromagnetic chuck 33 can be used to quickly grab the stamped plates for welding. Figure 5 It can be seen that the robot 1 has five degrees of freedom, and the working end of the robot 1 can grasp the oil tank 5.

[0020] like Figure 2 As shown, an embodiment of the utility model includes a mounting bracket 2, which includes a mounting plate 21 and a lateral mounting tube 22. The bottom surface of the mounting plate 21 is connected to a clamping claw assembly 4 by screws, and a plate is welded to the right end of the lateral mounting tube 22, and the plate is connected to a suction cup assembly 3 by screws.

[0021] Among them, the suction cup assembly 3 includes an electromagnetic suction cup 33. After the electromagnetic suction cup 33 is energized, the right end face is the working end face. The magnetic force generated by the working end face can grab each plate of the welding oil tank 5. The working end of the robot 1 drives the electromagnetic suction cup 33 to move through the mounting bracket 2, so that the freedom of the electromagnetic suction cup 33 can meet the needs of grabbing the plate of the welding oil tank 5 and changing the position, so that the welding equipment can conveniently weld the plate into the oil tank 5.

[0022] Among them, the clamping claw assembly 4 includes two groups of clamping parts 42, which can be extended and retracted to change their own length. The surface swept by the telescopic movement is the clamping surface 424. The clamping surface 424 is parallel to the working end surface of the electromagnetic suction cup 33, so that after the electromagnetic suction cup 33 grabs the plate for welding, it is convenient for the robot 1 to directly rotate ninety degrees to grab the welded oil tank 5 through the clamping part 42, so that the movement path of the working end of the robot 1 is shorter, thereby reducing the operation time.

[0023] like Figure 3 As shown, the suction cup assembly 3 also includes a suction cup mounting bracket 31 connected to the right end of the lateral mounting tube 22 by screws, and the other side of the suction cup mounting bracket 31 is connected to a buffer 32 by screws. The buffer 32 includes a guide rod and a spring sleeved around the guide rod. The other end of the buffer 32 is connected to a suction cup mounting bracket 35 by screws, and one end of the guide rod slides along the suction cup mounting bracket 35. One side of the suction cup mounting bracket 2 35 is connected to the electromagnetic suction cup 33 by screws, and the side thereof is fixed with a proximity sensor 34 by a bracket. The working end face of the proximity sensor 34 is 1-2 mm larger than the working end face of the electromagnetic suction cup 33 from the suction cup mounting bracket 2 35, so that when the robot 1 drives the suction cup assembly 3 to contact the plate, the proximity sensor 34 contacts the plate before the electromagnetic suction cup 33, thereby enabling the electromagnetic suction cup 33 to be energized in time to generate a magnetic field to grab the plate. At the same time, the impact generated by the hard contact between the proximity sensor 34 and the plate can be absorbed by sliding one end of the guide rod in the suction cup mounting bracket 2 35 and the compression spring, thereby protecting the proximity sensor 34 and the electromagnetic suction cup 33 and avoiding damage caused by a rigid collision with the plate.

[0024] like Figure 4 As shown, the clamp assembly 4 also includes two groups of pneumatic clamps 41. The pneumatic clamps 41 use cylinder clamps on the market, which can drive the clamping member 42 to do telescopic movement, and then clamp the welded oil tank 5. The clamping member 42 includes a first clamp 421 and a second clamp 422. The first clamp 421 has a U-shaped cross-section, and its opening faces the second clamp 422. The U-shaped port of the first clamp 421 is formed with a pressure plate 423 with a cross-sectional area larger than the U-shaped cross-sectional area. The pressure plate 423 is perpendicular to the clamping surface 424, so that the pressure plate 423 can clamp the side wall of the oil tank 5 under the drive of the pneumatic clamp 41. Secondly, the second clamp 422 has an L-shaped cross-section, and it cooperates with the first clamp 421 to clamp the oil tank 5.

[0025] In addition, two photoelectric sensors 43 are installed on the sides of the first clamp 421 and the second clamp 422. When the clamp 42 falls on the periphery of the oil tank 5, the photoelectric sensor 43 detects the oil tank 5, and then drives the pneumatic clamp 41 to drive the first clamp 421 and the second clamp 422 to clamp the oil tank 5.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0027] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A robot fixture for welding a forklift fuel tank, characterized in that: include Mounting bracket (2); A suction cup assembly (3) arranged on the side of the mounting bracket (2), the suction cup assembly (3) being provided with an electromagnetic suction cup (33); A clamping jaw assembly (4) is arranged on the bottom surface of the mounting bracket (2), and the clamping jaw assembly (4) is provided with a retractable clamping member (42), and the clamping member (42) is formed with a clamping surface (424), and the clamping surface (424) is parallel to the working end surface of the electromagnetic suction cup (33).

2. The robot fixture according to claim 1, characterized in that: The suction cup assembly (3) further comprises a buffer member (32) with one end arranged on the side of the mounting bracket (2), the buffer member (32) being formed with a structure capable of absorbing impact by means of compression, and the direction of the elastic force generated by the buffer member (32) being perpendicular to the working end face of the electromagnetic suction cup (33).

3. The robot fixture according to claim 2, characterized in that: The suction cup assembly (3) further comprises: A suction cup mounting bracket (31) connected to the side of the mounting bracket (2); A suction cup mounting bracket 2 (35) is parallel to the suction cup mounting bracket 1 (31), the electromagnetic suction cup (33) is arranged on a side of the suction cup mounting bracket 2 (35) away from the suction cup mounting bracket 1 (31), the opposite surfaces of the suction cup mounting bracket 2 (35) and the suction cup mounting bracket 1 (31) are connected to both ends of the buffer (32), and at least a part of the force component direction of the elastic force generated by the buffer (32) is perpendicular to the suction cup mounting bracket 1 (31); and A proximity sensor (34) is arranged on the same side of the suction cup mounting bracket 2 (35) and the electromagnetic suction cup (33), and the distance between the operating end face of the proximity sensor (34) and the suction cup mounting bracket 2 (35) is 1-2 mm greater than the distance between the operating end face of the electromagnetic suction cup (33) and the suction cup mounting bracket 2 (35).

4. The robot fixture according to claim 1, characterized in that: The clamping jaw assembly (4) further comprises a pneumatic clamping jaw (41), wherein the pneumatic clamping jaw (41) is capable of driving the clamping member (42) to perform telescopic movement, and the plane swept by the clamping member (42) during the telescopic movement is the clamping surface (424).

5. The robot fixture according to claim 4, characterized in that: The clamping member (42) comprises: A first clamping jaw (421) disposed at one end of the moving structure of the pneumatic clamping jaw (41); A second clamping jaw (422) disposed at the other end of the moving structure of the pneumatic clamping jaw (41); and The second clamping jaw (422) and the first clamping jaw (421) can move closer to or farther away from each other under the drive of the pneumatic clamping jaw (41), that is, the clamping member (42) performs telescopic movement.

6. The robot fixture according to claim 5, characterized in that: The first clamping jaw (421) is bent toward the second clamping jaw (422), and a pressure plate (423) is formed on the end surface of the bent portion of the first clamping jaw (421) facing the second clamping jaw (422).

7. The robot fixture according to claim 1, characterized in that: The mounting bracket (2) comprises: A lateral mounting tube (22), the end surface of which is connected to the suction cup assembly (3); A mounting plate (21) whose side surface is perpendicular to the length direction of the lateral mounting tube (22), and whose bottom surface is connected to the clamping jaw assembly (4).

8. The robot gripper according to any one of claims 1 to 7, characterized in that: It also includes a robot (1) and an oil tank (5), wherein the working end of the robot (1) is connected to the top surface of the mounting bracket (2), and the working end of the robot (1) can drive the suction cup assembly (3) and the clamping claw assembly (4) to assemble and carry the oil tank (5) through the mounting bracket (2).

Images