Anti-explosion tightening gun

Abstract

The utility model discloses an explosion-proof tightening gun which comprises a connecting frame (1) and is characterized in that an explosion-proof tightening mechanism (2), an explosion-proof positive pressure controller (3) and an explosion-proof 3D (three-dimensional) visual acquisition mechanism (4) are arranged in the connecting frame (1), and meanwhile, a connecting disc (5) is also arranged on the back side of the connecting frame (1); the anti-explosion tightening mechanism (2) comprises a fixed plate (6) directly and fixedly connected with the connecting frame (1), a movable plate (8) is slidably connected to the fixed plate (6) through a longitudinal guide rail (7), an anti-explosion servo motor (9) is arranged at the top of the movable plate (8), the output end of the anti-explosion servo motor (9) is connected with a rotating shaft (11) through a coupler (10), and the rotating shaft (11) is connected with the anti-explosion tightening mechanism (2). The rotating shaft (11) is rotationally supported on the movable plate (8) through a bearing seat (12), and a screwdriver head (15) is movably connected to the bottom end of the rotating shaft (11) in an inserted mode.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly, and in particular to an explosion-proof tightening gun. Background Technology

[0002] There is a huge demand for automatic screw-tightening equipment in the fields of automated production and assembly. However, in some special equipment industries, the requirements for automatic screw-tightening equipment are quite special, requiring explosion-proof standards. This means that traditional non-explosion-proof nail guns cannot be used in these special industries, and the most primitive manual screw-tightening method must be used. This results in many problems such as low work efficiency, high labor intensity, and deviations in tightening torque.

[0003] Meanwhile, due to structural defects, traditional automatic screw-on devices cause a large impact force between the screwdriver bit and the screw when they come into contact, which may generate sparks at the moment of collision. Therefore, directly applying such screw-on devices to fields with explosion-proof requirements poses a significant safety hazard.

[0004] Therefore, a method or apparatus is needed to solve the above problems. Summary of the Invention

[0005] This invention aims to address the aforementioned shortcomings of existing technologies by proposing an explosion-proof tightening gun that features a simple structure, ingenious design, and reasonable layout, enabling it to be used in explosion-proof environments and achieve fast, efficient, and safe screw tightening.

[0006] The technical solution of this utility model is: an explosion-proof tightening gun, including a connecting frame 1, characterized in that: an explosion-proof tightening mechanism 2, an explosion-proof positive pressure controller 3, and an explosion-proof 3D vision acquisition mechanism 4 are provided inside the connecting frame 1, and a connecting plate 5 is also provided on the back side of the connecting frame 1.

[0007] The explosion-proof tightening mechanism 2 includes a fixed plate 6 directly fixedly connected to the connecting frame 1. A movable plate 8 is slidably connected to the fixed plate 6 via a longitudinal guide rail 7. An explosion-proof servo motor 9 is mounted on the top of the movable plate 8. The output end of the explosion-proof servo motor 9 is connected to a rotating shaft 11 via a coupling 10. The rotating shaft 11 is rotatably supported on the movable plate 8 via a bearing seat 12. A torque limiter 13 and an explosion-proof torque sensor 14 are also mounted on the output end of the explosion-proof servo motor 9. A screwdriver bit 15 is movably inserted into the bottom end of the rotating shaft 11. A screw pick-up mechanism matching the screwdriver bit 15 is mounted on the bottom end of the fixed plate 6.

[0008] A cylinder mounting base 16 is provided on the movable plate 8, and a cylinder 17 is connected to the cylinder mounting base 16. The axis of the cylinder 17 is parallel to the axis of the rotating shaft 11. The end of the working shaft of the cylinder 17 is fixedly connected to a cylinder shaft mounting base 18 provided on the fixed plate 6. A spring 19 is also sleeved on the outside of the working shaft of the cylinder 17, and the spring 19 is located between the cylinder mounting base 16 and the cylinder shaft mounting base 18.

[0009] The screw picking mechanism includes a finger cylinder 20 fixedly connected to the fixing plate 6. The working end of the finger cylinder 20 is provided with a claw 21, and the end of the claw 21 is provided with an inclined surface 23 that matches the bottom surface of the screw 22.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] This type of explosion-proof tightening gun features a simple structure, ingenious design, and reasonable layout. Addressing the issue of traditional tightening guns being unsuitable for explosion-proof applications, it employs a unique structure. First, all internal electrical actuators are explosion-proof to fully meet explosion-proof requirements. Second, it includes an auxiliary support mechanism for the tightening mechanism. A spring in this mechanism provides upward elasticity to the tightening mechanism in real time, balancing its weight and minimizing the impact force when the bit contacts the screw, preventing sparks from violent collisions—again, to meet explosion-proof requirements. Simultaneously, it incorporates a screw-picking mechanism with inclined jaws. This design ensures the screw is coaxial with the threaded hole before entering it (during screw feeding), and pushes the inclined jaws to move to both sides after entering the hole, achieving automatic repositioning. Furthermore, this explosion-proof tightening gun has a simple manufacturing process and low production cost, so it can be said that it has many advantages and is particularly suitable for promotion and application in this field, with a very broad market prospect. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0013] Figure 2 This is a side view of an embodiment of the present utility model.

[0014] Figure 3 This is a structural schematic diagram of the explosion-proof tightening mechanism in an embodiment of this utility model.

[0015] Figure 4 This is a schematic diagram of the screw picking mechanism in an embodiment of this utility model.

[0016] Figures 5 to 8This is a schematic diagram of the operation process of the screw picking mechanism in an embodiment of this utility model. Detailed Implementation

[0017] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figures 1 to 8 As shown: An explosion-proof tightening gun includes a connecting frame 1 as a base. An explosion-proof tightening mechanism 2, an explosion-proof positive pressure controller 3, and an explosion-proof 3D vision acquisition mechanism 4 are disposed within the connecting frame 1. A connecting plate 5 is also disposed on the back side of the connecting frame 1.

[0018] The explosion-proof tightening mechanism 2 includes a fixed plate 6 directly fixedly connected to the connecting frame 1. A movable plate 8 is slidably connected to the fixed plate 6 via a longitudinal guide rail 7. An explosion-proof servo motor 9 is mounted on the top of the movable plate 8. The output end of the explosion-proof servo motor 9 is connected to a rotating shaft 11 via a coupling 10. The rotating shaft 11 is rotatably supported on the movable plate 8 via a bearing seat 12. A torque limiter 13 and an explosion-proof torque sensor 14 are also mounted on the output end of the explosion-proof servo motor 9. A screwdriver bit 15 is movably inserted into the bottom end of the rotating shaft 11. A screw pick-up mechanism matching the screwdriver bit 15 is mounted on the bottom end of the fixed plate 6.

[0019] A cylinder mounting base 16 is provided on the movable plate 8, and a cylinder 17 is connected to the cylinder mounting base 16. The axis of the cylinder 17 is parallel to the axis of the rotating shaft 11. The end of the working shaft of the cylinder 17 is fixedly connected to a cylinder shaft mounting base 18 provided on the fixed plate 6. A spring 19 is also sleeved on the outside of the working shaft of the cylinder 17, and the spring 19 is located between the cylinder mounting base 16 and the cylinder shaft mounting base 18.

[0020] The screw picking mechanism includes a finger cylinder 20 fixedly connected to the fixing plate 6. The working end of the finger cylinder 20 is provided with a claw 21, and the end of the claw 21 is provided with an inclined surface 23 that matches the bottom surface of the screw 22.

[0021] The working process of the explosion-proof tightening gun in this embodiment of the utility model is as follows: First, the connecting frame 1 is installed on the robotic arm using the connecting plate 5. Then, the robotic arm drives the device to move in space. During the movement, the explosion-proof 3D vision acquisition mechanism 4 works, determines the position of the screw 22 through visual signals, and drives the tightening gun to the screw 22. The screw picking mechanism picks up the screw 22, and then the robotic arm drives the tightening gun to the workpiece, inserting the bottom end of the screw 22 into the threaded hole.

[0022] Then, cylinder 17 retracts. Since the end of the working shaft of cylinder 17 is fixedly connected to the cylinder shaft fixing seat 18 on the fixed plate 6, and the cylinder barrel part of cylinder 17 is connected to the cylinder fixing seat 16 set on the movable plate 8, when cylinder 17 retracts, it will drive the movable plate 8 to move downward relative to the fixed plate 6. The movable plate 8 slides on the longitudinal guide rail 7, driving all the mechanisms on it to move downward at a uniform speed.

[0023] While the movable plate 8 moves, the explosion-proof servo motor 9 works. First, it drives the rotating shaft 11 to reverse, allowing the end of the bit 15 to be inserted into the cross groove or slot on the screw 22. Then, it drives the rotating shaft 11 to rotate forward, driving the screw 22 to rotate. Under the guidance of the threaded hole, the screw 22 rotates and feeds at the same time. During the downward movement of the screw 22, since the bottom surface of its end is conical, it will push the inclined surface 23 in contact with it to move to both sides (the finger cylinder 20 is not pressurized), that is, the pawl 21 moves to both sides, so that the screw 22 can be tightened smoothly in the threaded hole.

[0024] Due to the special structure of the chuck 21 (which supports the end of the screw 22 through the inclined surface 23), the screw can be kept stable when it is inserted into the threaded hole, and its axis is kept coaxial with the central axis of the threaded hole, which can avoid the phenomenon of twisting. After the screw 22 enters the threaded hole, it can automatically avoid it, thereby achieving the tightening of the screw 22.

[0025] During the rotation of screw 22, explosion-proof torque sensor 14 can always detect the output torque of shaft 11, while torque limiter 13 can prevent the output torque from being too large. This ensures that shaft 11 provides sufficient torque to screw 22 and protects screw 22 from damage to the cross groove or slotted groove on its end face.

[0026] During the above process, the spring 19 always pushes upward against the cylinder mounting base 16, thereby balancing the mass of all mechanisms on the movable plate 8. This can minimize the impact force when the bit 15 collides with the screw 22, effectively avoiding the generation of sparks at the moment of collision, so as to adapt to the explosion-proof environment.

Claims

1. An explosion-proof tightening gun comprising a connection frame (1), characterized in that: The connecting frame (1) is provided with an explosion-proof tightening mechanism (2), an explosion-proof positive pressure controller (3) and an explosion-proof 3D vision acquisition mechanism (4), and a connecting disc (5) is further arranged on the back side of the connecting frame (1), The explosion-proof tightening mechanism (2) comprises a fixed plate (6) fixedly connected with the connecting frame (1), an active plate (8) is slidably connected with the fixed plate (6) through a longitudinal guide rail (7), an explosion-proof servo motor (9) is arranged on the top of the active plate (8), an output end of the explosion-proof servo motor (9) is connected with a rotating shaft (11) through a shaft coupling (10), the rotating shaft (11) is rotatably supported on the active plate (8) through a bearing seat (12), a torque limiter (13) and an explosion-proof torque sensor (14) are further arranged on the output end of the explosion-proof servo motor (9), a stud (15) is movably inserted into the bottom end of the rotating shaft (11), and a screw picking mechanism matched with the stud (15) is arranged on the bottom end of the fixed plate (6), An air cylinder fixing seat (16) is arranged on the active plate (8), an air cylinder (17) is connected with the air cylinder fixing seat (16), an axis of the air cylinder (17) is parallel to an axis of the rotating shaft (11), an end of a working shaft of the air cylinder (17) is fixedly connected with an air cylinder shaft fixing seat (18) arranged on the fixed plate (6), and a spring (19) is sleeved on the working shaft of the air cylinder (17), the spring (19) is located between the air cylinder fixing seat (16) and the air cylinder shaft fixing seat (18), The screw picking mechanism comprises a finger air cylinder (20) fixedly connected with the fixed plate (6), a claw (21) is arranged on a working end of the finger air cylinder (20), and an inclined surface (23) matched with a bottom surface of an end head of a screw (22) is arranged on an end of the claw (21).

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