Tightening device for installing screw

Abstract

A tightening device for installing a screw, which reduces the main torque, has a more compact structure, and further improves the screw fastening efficiency. A screw supply device (2) is arranged on a frame (1); a feed port of the screw supply device is in communication with a screw conveying device; a discharge port of the screw supply device is provided with a floating engagement prevention device (3); the floating engagement prevention device is arranged on the frame by means of a pre-pressing rail (10); a power input end of the floating engagement prevention device is provided with a pre-pressing cylinder (9); an engagement linkage device (5) is slidably arranged on a main pressing rail (4); one end of the bottom of the engagement linkage device is connected to a piston rod of a main pressing cylinder (7) fixed to the frame; one end of the top of the engagement linkage device is in power connection with a torque driving device (8); the other end of the top of the engagement linkage device is inserted into the floating engagement prevention device by means of a tightening guide rod (6), and can be matched and engaged with a screw entering the floating engagement prevention device, and the torque driving device drives the tightening guide rod to rotate to tighten the screw. The present invention can be widely applied in the field of automatic screw fastening equipment.

Description

A tightening device for setting screws Technical Field

[0001] This invention relates to a tightening device for setting screws, belonging to the technical field of automatic screw-driving equipment. Background Technology

[0002] Current automatic screw-driving equipment mainly consists of a feeding system and a tightening system. The tightening system is an automated device that uses an automated mechanism to replace manual labor in picking up, placing, and tightening screws. It is a small automated device aimed at improving work efficiency and is widely used in the electronics industry.

[0003] The existing tightening system has the problem of excessive active torque and a slightly bulky structure, and there is still room for improvement in nailing efficiency. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides a tightening device for setting screws, which shortens the active torque, makes the structure more compact, and further improves the nailing efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a screw tightening device for setting screws, comprising a frame, a screw feeding device, an anti-floating engagement device, a main pressure rail, an engagement linkage device, a tightening guide rod, a main pressure cylinder, a torque drive device, a pre-pressure cylinder, and a pre-pressure rail. The screw feeding device is mounted on the frame, and the feed inlet of the screw feeding device is connected to the screw delivery device. The discharge outlet of the screw feeding device is provided with an anti-floating engagement device. The anti-floating engagement device is mounted on the frame via the pre-pressure rail. The power input end of the anti-floating engagement device is provided with a pre-pressure cylinder, and the pre-pressure cylinder drives the anti-floating engagement device to slide back and forth on the pre-pressure rail.

[0006] The main pressure rail is longitudinally fixed on the frame, and the meshing linkage device is slidably mounted on the main pressure rail. One bottom end of the meshing linkage device is connected to the piston rod of the main pressure cylinder fixed on the frame. The main pressure cylinder drives the meshing linkage device to slide back and forth along the main pressure rail. One top end of the meshing linkage device is poweredly connected to the torque drive device. The other top end of the meshing linkage device is inserted into the anti-floating meshing device through a tightening guide rod and can be matched and engaged with the screw that enters the anti-floating meshing device. The torque drive device drives the tightening guide rod to rotate and tighten the screw.

[0007] Furthermore, the structure of the anti-floating engagement device includes an engagement device fixing seat, an engagement device support plate, a tightening guide rod sleeve, an actuating arm, a guide rod slider, a screw clamp, a pressure nozzle, a clamp cylinder, and a nail clamp control finger. The engagement device fixing seat has engagement device support plates fixedly installed on both sides of one end. The tightening guide rod sleeve is installed at the ends of the two engagement device support plates. A pressure nozzle is installed at the end of the tightening guide rod sleeve. The guide rod slider is slidably mounted on the tightening guide rod sleeve. Actuating arms are installed on both sides of the guide rod slider. A screw clamp is installed at the front end of each actuating arm. The clamp cylinder is installed on the engagement device fixing seat. A nail clamp control finger is connected to the piston rod of the clamp cylinder. The nail clamp control finger can push the guide rod slider to move under the operation of the clamp cylinder.

[0008] Furthermore, the engagement device fixing seat is set on the engagement device base plate, the engagement device base plate is slidably set on the preload track, and the engagement device base plate is connected to the piston rod of the preload cylinder through the engagement device base plate.

[0009] Furthermore, a base plate nail feeding tube is provided through the fixed seat of the engagement device. One end of the base plate nail feeding tube is connected to the nail supply device, and the other end of the base plate nail feeding tube is connected to an inclined guide nail tube. The end of the inclined guide nail tube is connected to a swing nail feeding tube, and the end of the swing nail feeding tube is connected to the inner tube of the tightening guide rod sleeve.

[0010] Furthermore, the structure of the torque drive device includes a servo motor, a rotary support shaft, a base plate, a spline, a main pulley, a synchronous belt, and a small pulley. The body of the servo motor is fixed to the cylinder body of the main pressure cylinder via the base plate. The power output end of the servo motor is provided with a main pulley. The rotary support shaft is movably mounted on the base plate and has a small pulley. The main pulley and the small pulley are connected by a synchronous belt. The end of the rotary support shaft is provided with a spline and is connected to a meshing linkage device via the spline.

[0011] Furthermore, a displacement sensor bracket is provided on the side of the engagement device fixing seat, the displacement sensor bracket is set close to the side plate of the frame, and a displacement sensor is installed on the displacement sensor bracket.

[0012] Furthermore, a proximity switch mounting plate is provided on the engagement device mounting base, and a proximity switch is provided on the proximity switch mounting plate.

[0013] Furthermore, the frame has a shell-like structure that can cover the anti-floating engagement device and the engagement linkage device.

[0014] Furthermore, a valve island is provided on the side plate of the frame below the servo motor, and the valve island is provided with various valves for controlling the cylinder action.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: By integrating the anti-floating engagement device and the engagement linkage device, and passing the screw feeding device through it, the smoothness of screw feeding is not affected. Moreover, the pre-pressurization cylinder is used to pre-press and tighten the screw, ensuring that the screw is upright and tightened, thus ensuring the accuracy of subsequent tightening. The servo motor and the main pressure cylinder ensure that continuous pressure is maintained during tightening, ensuring that the screw is tightened smoothly, greatly shortening the active torque, and making the overall structure more compact. Attached Figure Description

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 is a schematic diagram of the structure of the present invention.

[0018] Figure 2 is a partial three-dimensional structural schematic diagram of the present invention.

[0019] Figure 3 is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 4 is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 5 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device in this invention.

[0022] Figure 6 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device in this invention.

[0023] Figure 7 is a partial three-dimensional structural schematic diagram of the anti-floating engagement device in this invention.

[0024] In the diagram: 1 is the frame, 2 is the nail feeding device, 3 is the anti-floating engagement device, 31 is the engagement device fixing seat, 32 is the engagement device support plate, 33 is the tightening guide rod sleeve, 34 is the actuating arm, 35 is the guide rod slider, 36 is the screw gripper, 37 is the pressure nozzle, 38 is the gripper cylinder, 39 is the nail clamp control finger, 310 is the engagement device base plate, 311 is the base plate nail feeding tube, 312 is the angled guide nail tube, 313 is the swinging nail feeding tube, and 314 is the position... 315 is the displacement sensor bracket, 316 is the proximity switch mounting plate, 317 is the proximity switch, 4 is the main pressure rail, 5 is the meshing linkage device, 6 is the tightening guide rod, 7 is the main pressure cylinder, 8 is the torque drive device, 81 is the servo motor, 82 is the rotating support shaft, 83 is the force-bearing base plate, 84 is the spline, 85 is the main pulley, 86 is the synchronous belt, 87 is the small pulley, 9 is the pre-pressure cylinder, 10 is the pre-pressure rail, and 11 is the valve island. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] As shown in Figures 1 to 7, the present invention provides a screw tightening device, comprising a frame 1, a screw feeding device 2, an anti-floating engagement device 3, a main pressure rail 4, an engagement linkage device 5, a tightening guide rod 6, a main pressure cylinder 7, a torque drive device 8, a pre-pressure cylinder 9, and a pre-pressure rail 10. The screw feeding device 2 is mounted on the frame 1, and its inlet is connected to the screw feeding device. The outlet of the screw feeding device 2 is provided with the anti-floating engagement device 3. The anti-floating engagement device 3 is mounted on the frame 1 via the pre-pressure rail 10. The power input end of the anti-floating engagement device 3 is provided with the pre-pressure cylinder 9, which drives the anti-floating engagement device 3 to slide back and forth on the pre-pressure rail 10.

[0027] The main pressure rail 4 is longitudinally fixed on the frame 1. The meshing linkage device 5 is slidably mounted on the main pressure rail 4. One bottom end of the meshing linkage device 5 is connected to the piston rod of the main pressure cylinder 7 fixed on the frame 1. The main pressure cylinder 7 drives the meshing linkage device 5 to slide back and forth along the main pressure rail 4. One top end of the meshing linkage device 5 is poweredly connected to the torque drive device 8. The other top end of the meshing linkage device 5 is inserted into the anti-floating meshing device 3 through the tightening guide rod 6 and can be matched and engaged with the screw entering the anti-floating meshing device 3. The structure of the torque drive device 8 includes a servo motor 81, a rotary support shaft 82, and a bearing. The servo motor 81 is fixed to the cylinder body of the main pressure cylinder 7 via the force-bearing base plate 83, spline 84, main pulley 85, synchronous belt 86, and small pulley 87. The power output end of the servo motor 81 is provided with the main pulley 85. The rotating support shaft 82 is movably mounted on the force-bearing base plate 83, and the small pulley 87 is provided on the rotating support shaft 82. The main pulley 85 and the small pulley 87 are connected by the synchronous belt 86. The end of the rotating support shaft 82 is provided with a spline 84, and is connected to the meshing linkage device 5 via the spline 84. The spline 84 allows for lateral movement while maintaining rotation. The screw is tightened by driving the tightening guide rod 6 to rotate through the torque drive device 8; a valve island 11 is provided on the side plate of the frame 1 below the servo motor 81, and various valves are provided on the valve island 11 to control the action of various cylinders in the device. The frame 1 is a shell structure that can cover the anti-floating engagement device 3 and the engagement linkage device 5.

[0028] The structure of the anti-floating engagement device 3 includes an engagement device fixing seat 31, an engagement device support plate 32, a tightening guide rod sleeve 33, an actuating arm 34, a guide rod slider 35, a screw gripper 36, a pressure nozzle 37, a gripper cylinder 38, and a screw gripper control finger 39. The engagement device fixing seat 31 has engagement device support plates 32 fixedly installed on both sides of one end. The tightening guide rod sleeve 33 is installed at the ends of the two engagement device support plates 32. A pressure nozzle 37 is installed at the end of the tightening guide rod sleeve 33. The guide rod slider 35 is slidably mounted on the tightening guide rod sleeve 33. An actuating arm 34 is installed on both sides of the guide rod slider 35. A screw gripper 36 is installed at the front end of each actuating arm 34. The gripper cylinder 38 is installed on the engagement device fixing seat 31. A nail clamp control finger 39 is connected to the piston rod of the cylinder 38. The nail clamp control finger 39 can push the guide rod slider 35 to move under the operation of the gripper cylinder 38. The engagement device fixing seat 31 is set on the engagement device base plate 310. The engagement device base plate 310 is slidably set on the preload track 10. The engagement device base plate 310 is connected to the piston rod of the preload cylinder 9. A base plate nail feeding tube 311 is provided through the engagement device fixing seat 31. One end of the base plate nail feeding tube 311 is connected to the nail supply device 2. The other end of the base plate nail feeding tube 311 is connected to the inclined guide nail tube 312. The end of the inclined guide nail tube 312 is connected to the swing nail feeding tube 313. The end of the swing nail feeding tube 313 is connected to the inner tube of the tightening guide rod sleeve 33.

[0029] A displacement sensor bracket 314 is provided on the side of the engagement device fixing seat 31. The displacement sensor bracket 314 is set close to the side plate of the frame 1. A displacement sensor 315 is provided on the displacement sensor bracket 314. A proximity switch mounting plate 316 is provided on the engagement device fixing seat 31. A proximity switch 317 is provided on the proximity switch mounting plate 316. The displacement sensor 315 and the proximity switch 317 are used to limit displacement and control cylinder reset.

[0030] In this invention, screws fall one by one from the screw feeding device into the screw supply device 2. The screw supply device 2 is a tubular structure, and the screws cannot be rotated inside it, but can only fall in one direction. After passing through the base plate screw feeding pipe 311, the inclined guide screw pipe 312 and the swing screw feeding pipe 313, they enter the anti-floating engagement device 3. Driven by the pre-pressure cylinder 9, the anti-floating engagement device 3 moves along the pre-pressure track 10 to align the screw with the pressure nozzle 37. The main pressure cylinder 7 drives the engagement linkage device 5 to move and press the tightening guide sleeve 33 onto the screw cap. At the same time, the servo motor 81 is started to drive the tightening guide sleeve 33 to rotate, while the main pressure cylinder 7 is controlled to keep the tightening guide sleeve 33 pressing the screw cap. At the same time, the clamping cylinder 38 is started to drive the screw clamp 36 to open, and the screw is completely screwed into place after being disengaged from the screw clamp 36. Then, each cylinder is reset to prepare for the screwing of the next screw.

[0031] This invention integrates the anti-floating engagement device 3 and the engagement linkage device 5, and passes the screw supply device 2 through it, without affecting the smoothness of screw feeding. Moreover, the pre-pressurization cylinder 9 is used to pre-press and tighten the screw, ensuring that the screw is upright and tightened, thus ensuring the accuracy of subsequent tightening. The servo motor 81 and the main pressure cylinder 7 ensure that continuous pressure is maintained during tightening, ensuring that the screw is tightened smoothly, greatly shortening the active torque, and making the overall structure more compact.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A screw setting device for setting a screw, characterized in that, The device includes a frame (1), a nail feeding device (2), an anti-floating engagement device (3), a main pressure rail (4), an engagement linkage device (5), a tightening guide rod (6), a main pressure cylinder (7), a torque drive device (8), a pre-pressure cylinder (9), and a pre-pressure rail (10). The nail feeding device (2) is mounted on the frame (1). The inlet of the nail feeding device (2) is connected to the nail feeding device. The outlet of the nail feeding device (2) is equipped with an anti-floating engagement device (3). The anti-floating engagement device (3) is mounted on the frame (1) via the pre-pressure rail (10). The power input end of the anti-floating engagement device (3) is equipped with a pre-pressure cylinder (9). The pre-pressure cylinder (9) drives the anti-floating engagement device (3) to slide back and forth on the pre-pressure rail (10). The main pressure rail (4) is longitudinally fixed on the frame (1), and the meshing linkage device (5) is slidably mounted on the main pressure rail (4). One bottom end of the meshing linkage device (5) is connected to the piston rod of the main pressure cylinder (7) fixed on the frame (1). The meshing linkage device (5) is driven to slide back and forth along the main pressure rail (4) by the main pressure cylinder (7). One top end of the meshing linkage device (5) is poweredly connected to the torque drive device (8). The other top end of the meshing linkage device (5) is inserted into the anti-floating meshing device (3) through the tightening guide rod (6) and can be matched and engaged with the screw that enters the anti-floating meshing device (3). The screw is tightened by driving the tightening guide rod (6) to rotate through the torque drive device (8).

2. A screw setting device according to claim 1, wherein The structure of the anti-floating engagement device (3) is as follows: it includes an engagement device fixing seat (31), an engagement device support plate (32), a tightening guide rod sleeve (33), an actuating arm (34), a guide rod slider (35), a screw clamp (36), a pressure nozzle (37), a clamp cylinder (38), and a screw clamp control finger (39). The engagement device fixing seat (31) has engagement device support plates (32) fixedly installed on both sides of one end. The tightening guide rod sleeve (33) is installed at the ends of the two engagement device support plates (32). 3) is provided with a pressure nozzle (37) at the end. The guide rod slider (35) is slidably mounted on the tightening guide rod sleeve (33). Both sides of the guide rod slider (35) are provided with an action arm (34). The front end of each action arm (34) is provided with a screw gripper (36). The gripper cylinder (38) is mounted on the meshing device fixing seat (31). The piston rod of the gripper cylinder (38) is connected to a nail clamp control finger (39). The nail clamp control finger (39) can push the guide rod slider (35) to move under the operation of the gripper cylinder (38).

3. A tightening device for setting screws according to claim 2, characterized in that, The engagement device fixing seat (31) is set on the engagement device base plate (310), the engagement device base plate (310) is slidably set on the pre-compression rail (10), and the engagement device base plate (310) is connected to the piston rod of the pre-compression cylinder (9) through the engagement device base plate (310).

4. A tightening device for setting screws according to claim 3, characterized in that, A base plate nail feeding tube (311) is provided through the engagement device fixing seat (31). One end of the base plate nail feeding tube (311) is connected to the nail supply device (2), and the other end of the base plate nail feeding tube (311) is connected to an oblique guide nail tube (312). The end of the oblique guide nail tube (312) is connected to an oscillating nail feeding tube (313), and the end of the oscillating nail feeding tube (313) is connected to the inner tube of the tightening guide rod sleeve (33).

5. A tightening device for setting screws according to claim 1, characterized in that, The structure of the torque drive device (8) is as follows: it includes a servo motor (81), a rotating support shaft (82), a force-bearing base plate (83), a spline (84), a main pulley (85), a synchronous belt (86), and a small pulley (87). The body of the servo motor (81) is fixed together with the cylinder body of the main pressure cylinder (7) through the force-bearing base plate (83). The power output end of the servo motor (81) is provided with a main pulley (85). The rotating support shaft (82) is movably mounted on the force-bearing base plate (83). The small pulley (87) is provided on the rotating support shaft (82). The main pulley (85) and the small pulley (87) are connected by a synchronous belt (86). The end of the rotating support shaft (82) is provided with a spline (84) and is connected by a spline (84) to the meshing linkage device (5).

6. A tightening device for setting screws according to claim 4, characterized in that, The side of the engagement device fixing seat (31) is provided with a displacement sensor bracket (314), the displacement sensor bracket (314) is closely attached to the side plate of the frame (1), and a displacement sensor (315) is provided on the displacement sensor bracket (314).

7. A tightening device for setting screws according to claim 4, characterized in that, The engagement device mounting base (31) is provided with a proximity switch mounting plate (316), and the proximity switch mounting plate (316) is provided with a proximity switch (317).

8. A tightening device for setting screws according to claim 1, characterized in that, The frame (1) is a shell structure that can cover the anti-floating engagement device (3) and the engagement linkage device (5).

9. A tightening device for setting screws according to claim 5, characterized in that, A valve island (11) is provided on the side plate of the frame (1) below the servo motor (81). The valve island (11) is provided with a variety of valves for controlling the cylinder action.

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