A tightening device for setting a screw

Abstract

The invention discloses a tightening device for setting screws, which shortens the active torque, has a more compact structure, and further improves the nailing efficiency; the nail supply device is arranged on a frame, the feed port of the nail supply device is connected with the nail feeding device, the discharge port of the nail supply device is provided with a floating prevention meshing device, the floating prevention meshing device is arranged on the frame through a pre-pressing track, the power input end of the floating prevention meshing device is provided with a pre-pressing cylinder, the meshing linkage device is slidably arranged on the main pressing track, the bottom end of the meshing linkage device is connected with the main pressing cylinder piston rod fixed to the frame, the top end of the meshing linkage device is connected with the torque driving device power, the top other end of the meshing linkage device is inserted into the floating prevention meshing device through a tightening guide rod and can be matched and clamped with the screw entering the floating prevention meshing device, and the tightening guide rod is driven to rotate by the torque driving device to tighten the screw; the invention can be widely used in the field of automatic screw driving equipment.

Description

Technical Field

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

[0002] The current automatic screw driving equipment is mainly composed of a feeding system and a tightening system. The tightening system is an automated device that uses an automated mechanism to replace manual labor to complete the removal, placement, and tightening of screws. It is a small automated equipment for the purpose of improving work efficiency and is widely used in the electronics industry.

[0003] The existing tightening system has the problem of too long active torque, and the structure is a bit bloated, and there is room for further improvement in nailing efficiency. Summary of the invention

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

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tightening device for setting screws, including a frame, a nail supply device, a floating prevention meshing device, a main pressure track, a meshing linkage device, a tightening guide rod, a main pressure cylinder, a torque drive device, a pre-pressing cylinder and a pre-pressing track, the nail supply device is arranged on the frame, the feed port of the nail supply device is connected with the nail feeding device, the discharge port of the nail supply device is provided with a floating prevention meshing device, the floating prevention meshing device is arranged on the frame through the pre-pressing track, the power input end of the floating prevention meshing device is provided with a pre-pressing cylinder, and the pre-pressing cylinder drives the floating prevention meshing device to slide back and forth on the pre-pressing track;

[0006] The main pressure track is longitudinally fixed on the frame, and the meshing linkage device is slidably set on the main pressure track. The bottom end of the meshing linkage device is connected to the piston rod of the main pressure cylinder fixed to the frame. The meshing linkage device is driven by the main pressure cylinder to slide reciprocatingly along the main pressure track. The top end of the meshing linkage device is dynamically connected to the torque driving device. The other top end of the meshing linkage device is inserted into the anti-floating meshing device through the tightening guide rod and can be matched and engaged with the screw entering the anti-floating meshing device. The tightening guide rod is driven by the torque driving device to rotate to tighten the screw.

[0007] Furthermore, the structure of the anti-floating engagement device is as follows: it includes an engagement device fixing seat, an engagement device support plate, a tightening guide rod sleeve, an action arm, a guide rod slider, a screw clamp, a pressure nozzle, a clamp cylinder and a nail clamp control finger, the engagement device support plates are fixedly arranged on both sides of one end of the engagement device fixing seat, the tightening guide rod sleeve is arranged at the ends of the two engagement device support plates, the ends of the tightening guide rod sleeve are provided with a pressure nozzle, the guide rod slider is slidably arranged on the tightening guide rod sleeve, the action arms are arranged on both sides of the guide rod slider, the front end of each of the action arms is provided with a screw clamp, the clamp cylinder is arranged on the engagement device fixing seat, the piston rod of the clamp cylinder is connected with a nail clamp control finger, and 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 arranged on the engagement device bottom plate, the engagement device bottom plate is slidably arranged on the pre-stressing track, and the engagement device bottom plate is connected to the piston rod of the pre-stressing cylinder through the engagement device bottom plate.

[0009] Furthermore, a bottom plate nail delivery tube is provided through the fixing seat of the engagement device, one end of the bottom plate nail delivery tube is connected to the nail supply device, the other end of the bottom plate nail delivery tube is connected to an inclined nail guide tube, the end of the inclined nail guide tube is connected to a swinging nail delivery tube, and the end of the swinging nail delivery tube is connected to the inner tube of the tightening guide rod sleeve.

[0010] Furthermore, the structure of the torque driving device is as follows: it includes a servo motor, a rotating support shaft, a force-bearing 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 through the force-bearing base plate. The power output end of the servo motor is provided with a main pulley. The rotating support shaft is movably arranged on the force-bearing base plate. A small pulley is arranged on the rotating support shaft. The main pulley and the small pulley are connected by a synchronous belt power connection. The end of the rotating support shaft is provided with a spline and is dynamically connected to the meshing linkage device through the spline.

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

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

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

[0014] Furthermore, a valve island is arranged on the frame side plate below the servo motor, and a variety of valves are arranged on the valve island for controlling the movement of the cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention integrates the anti-floating meshing device and the meshing linkage device, and runs the nail feeding device through them, which does not affect the smoothness of screw delivery, and uses the pre-compression cylinder for pre-compression and tightening to ensure that the screws are upright and tightened, thereby ensuring the accuracy of subsequent screwing. The servo motor and the main pressure cylinder ensure that continuous pressure is maintained while screwing, ensuring that the screws are tightened smoothly, greatly shortening the active torque, and making the overall structure more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

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

[0018] Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 1 .

[0019] Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 2 .

[0020] Figure 4 It is a schematic diagram of the local three-dimensional structure of the present invention Figure 3 .

[0021] Figure 5 The partial three-dimensional structure of the floating engagement prevention device in the present invention is shown in FIG. Figure 1 .

[0022] Figure 6 The partial three-dimensional structure of the floating engagement prevention device in the present invention is shown in FIG. Figure 2 .

[0023] Figure 7 The partial three-dimensional structure of the floating engagement prevention device in the present invention is shown in FIG. Figure 3 .

[0024] In the figure: 1 is a frame, 2 is a nail supply device, 3 is a floating prevention meshing device, 31 is a meshing device fixing seat, 32 is a meshing device support plate, 33 is a tightening guide rod sleeve, 34 is an action arm, 35 is a guide rod slider, 36 is a screw clamp, 37 is a pressure nozzle, 38 is a clamp cylinder, 39 is a nail clamp control finger, 310 is a meshing device bottom plate, 311 is a bottom plate nail delivery tube, 312 is an inclined nail guide tube, 313 is a swing nail delivery tube, 314 is a position 315 is the displacement sensor bracket, 316 is the proximity switch mounting plate, 317 is the proximity switch, 4 is the main pressure track, 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 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 track, and 11 is the valve island. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments.

[0026] like Figure 1 to Figure 7 As shown, the present invention is a tightening device for setting screws, comprising a frame 1, a nail supply device 2, a floating prevention meshing device 3, a main pressure track 4, a meshing linkage device 5, a tightening guide rod 6, a main pressure cylinder 7, a torque driving device 8, a pre-pressing cylinder 9 and a pre-pressing track 10, wherein the nail supply device 2 is arranged on the frame 1, the feed port of the nail supply device 2 is connected with the nail feeding device, the discharge port of the nail supply device 2 is provided with a floating prevention meshing device 3, the floating prevention meshing device 3 is arranged on the frame 1 through the pre-pressing track 10, the power input end of the floating prevention meshing device 3 is provided with a pre-pressing cylinder 9, and the pre-pressing cylinder 9 drives the floating prevention meshing device 3 to slide back and forth on the pre-pressing track 10;

[0027] The main pressure rail 4 is longitudinally fixed on the frame 1, and the meshing linkage device 5 is slidably set on the main pressure rail 4. The bottom end of the meshing linkage device 5 is connected to the piston rod of the main pressure cylinder 7 fixed to the frame 1, and the meshing linkage device 5 is driven by the main pressure cylinder 7 to slide back and forth along the main pressure rail 4. The top end of the meshing linkage device 5 is dynamically connected to the torsion drive device 8. The other top end of the meshing linkage device 5 is inserted into the anti-floating meshing device 3 by tightening the guide rod 6 and can match and snap-fit ​​with the screw entering the anti-floating meshing device 3. The structure of the torsion drive device 8 is: including a servo motor 81, a rotating support shaft 82, and a receiving The servo motor 81 is fixed to the cylinder body of the main pressure cylinder 7 through the force base plate 83, and the power output end of the servo motor 81 is provided with a main pulley 85. The rotating support shaft 82 is movably arranged on the force base plate 83. The rotating support shaft 82 is provided with a small pulley 87. The main pulley 85 and the small pulley 87 are connected to each other through a 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 through the spline 84. The spline 84 can be used to maintain rotation while also allowing for transverse movement. The tightening guide rod 6 is driven to rotate by the torque driving device 8 to tighten the screw; a valve island 11 is arranged on the side panel of the frame 1 below the servo motor 81, and a variety of valves are arranged on the valve island 11 for controlling the actions of various cylinders in the device. The frame 1 is a shell-like structure, which can cover the anti-floating meshing device 3 and the meshing linkage device 5.

[0028] The structure of the anti-floating meshing device 3 is as follows: it includes a meshing device fixing seat 31, a meshing device support plate 32, a tightening guide rod sleeve 33, an action arm 34, a guide rod slider 35, a screw clamp 36, a pressure nozzle 37, a clamp cylinder 38 and a nail clamp control finger 39, wherein the meshing device fixing seat 31 is fixedly provided with a meshing device support plate 32 on both sides of one end, the tightening guide rod sleeve 33 is provided at the ends of the two meshing device support plates 32, a pressure nozzle 37 is provided at the end of the tightening guide rod sleeve 33, the guide rod slider 35 is slidably provided on the tightening guide rod sleeve 33, the action arm 34 is provided on both sides of the guide rod slider 35, and a screw clamp 36 is provided at the front end of each of the action arms 34, the clamp cylinder 38 is provided at the meshing device fixing seat 31, and the clamp A nail clamp control finger 39 is connected to the piston rod of the cylinder 38, and the nail clamp control finger 39 can push the guide rod slider 35 to move under the operation of the clamping claw cylinder 38; the meshing device fixed seat 31 is set on the meshing device bottom plate 310, and the meshing device bottom plate 310 is slidably set on the pre-pressing track 10, and the meshing device bottom plate 310 is connected to the piston rod of the pre-pressing cylinder 9 through the meshing device bottom plate 310; a bottom plate nail delivery tube 311 is penetrated by the meshing device fixed seat 31, one end of the bottom plate nail delivery tube 311 is connected to the nail supply device 2, and the other end of the bottom plate nail delivery tube 311 is connected to an inclined guide nail tube 312, and the end of the inclined guide nail tube 312 is connected to a swing nail delivery tube 313, and the end of the swing nail delivery tube 313 is connected to the inner tube of the tightening guide rod sleeve 33.

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

[0030] In the present invention, screws fall into the nail feeding device 2 one by one from the nail feeding device. The nail feeding device 2 is a tubular structure. The screws cannot turn over in it and can only keep falling in one direction. After passing through the bottom plate nail feeding tube 311, the inclined nail guide tube 312 and the swing nail feeding tube 313, they enter the anti-floating meshing device 3. Under the drive of the pre-stressing cylinder 9, the anti-floating meshing device 3 moves along the pre-stressing track 10 to align the screw with the pressure nozzle 37, and the main pressure cylinder 7 is controlled to drive the meshing linkage device 5 to move and press the tightening guide rod sleeve 33 against the screw cap. While starting the servo motor 81 to drive the tightening guide rod sleeve 33 to rotate, the main pressure cylinder 7 is controlled to keep the tightening guide rod sleeve 33 pressing the screw cap, and at the same time, the clamping cylinder 38 is started to drive the screw clamping jaw 36 to open, and the screw is detached from the screw clamping jaw 36 and is completely screwed into place, and then each cylinder is reset to prepare for the screwing of the next screw.

[0031] The present invention integrates the anti-floating meshing device 3 and the meshing linkage device 5, and runs the nail feeding device 2 therethrough, which does not affect the smoothness of screw delivery. The pre-compression cylinder 9 is used for pre-compression and tightening to ensure that the screws are upright and tightened, thereby ensuring the accuracy of subsequent screwing. The servo motor 81 and the main pressure cylinder 7 ensure that continuous pressure is maintained while screwing, ensuring that the screws are tightened smoothly, greatly shortening the active torque, and making the overall structure more compact.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A tightening device for setting a screw, characterized in that: The invention comprises a frame (1), a nail supply device (2), a floating prevention meshing device (3), a main pressure track (4), a meshing linkage device (5), a tightening guide rod (6), a main pressure cylinder (7), a torque driving device (8), a pre-pressing cylinder (9) and a pre-pressing track (10), wherein the nail supply device (2) is arranged on the frame (1), the feed port of the nail supply device (2) is connected to the nail feeding device, the discharge port of the nail supply device (2) is provided with a floating prevention meshing device (3), the floating prevention meshing device (3) is arranged on the frame (1) through the pre-pressing track (10), the power input end of the floating prevention meshing device (3) is provided with a pre-pressing cylinder (9), and the pre-pressing cylinder (9) drives the floating prevention meshing device (3) to slide back and forth on the pre-pressing track (10); The main pressure rail (4) is longitudinally fixedly arranged on the frame (1), and the meshing linkage device (5) is slidably arranged on the main pressure rail (4). The bottom end of the meshing linkage device (5) is connected to the piston rod of the main pressure cylinder (7) fixed to the frame (1), and the meshing linkage device (5) is driven by the main pressure cylinder (7) to slide back and forth along the main pressure rail (4). The top end of the meshing linkage device (5) is dynamically connected to the torque driving device (8), and 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 is matched and clamped with the screw entering the anti-floating meshing device (3), and the tightening guide rod (6) is driven by the torque driving device (8) to rotate and tighten the screw; The structure of the anti-floating meshing device (3) is as follows: it includes a meshing device fixing seat (31), a meshing device support plate (32), a tightening guide rod sleeve (33), an action arm (34), a guide rod slider (35), a screw clamp (36), a pressure nozzle (37), a clamp cylinder (38) and a nail clamp control finger (39), wherein the meshing device fixing seat (31) is fixedly provided with a meshing device support plate (32) on both sides at one end, the tightening guide rod sleeve (33) is provided at the ends of the two meshing device support plates (32), and the tightening guide rod sleeve (33) is provided at the ends of the two meshing device support plates (32). 3) is provided with a pressure nozzle (37), the guide rod slider (35) is slidably arranged on the tightening guide rod sleeve (33), the guide rod slider (35) is provided with an action arm (34) on both sides, and a screw clamp (36) is provided at the front end of each action arm (34), the clamp cylinder (38) is provided on the meshing device fixing seat (31), and the piston rod of the clamp cylinder (38) is connected with a nail clamp control finger (39), and the nail clamp control finger (39) can push the guide rod slider (35) to move under the operation of the clamp cylinder (38).

2. A tightening device for setting a screw according to claim 1, characterized in that: The meshing device fixing seat (31) is arranged on a meshing device bottom plate (310), the meshing device bottom plate (310) is slidably arranged on a pre-pressing track (10), and the meshing device bottom plate (310) is connected to a piston rod of a pre-pressing cylinder (9) via the meshing device bottom plate (310).

3. A tightening device for setting a screw according to claim 2, characterized in that: A bottom plate nail delivery tube (311) is provided through the engagement device fixing seat (31), one end of the bottom plate nail delivery tube (311) is communicated with the nail supply device (2), the other end of the bottom plate nail delivery tube (311) is connected to an oblique nail guide tube (312), the end of the oblique nail guide tube (312) is connected to a swing nail delivery tube (313), and the end of the swing nail delivery tube (313) is communicated with the inner tube of the tightening guide rod sleeve (33).

4. A tightening device for setting a screw according to claim 1, characterized in that: The torque driving device (8) has a structure comprising 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 to the cylinder body of the main pressure cylinder (7) through the force-bearing base plate (83); a main pulley (85) is provided at the power output end of the servo motor (81); the rotating support shaft (82) is movably arranged on the force-bearing base plate (83); a small pulley (87) is provided on the rotating support shaft (82); the main pulley (85) and the small pulley (87) are connected to each other by a synchronous belt (86); a spline (84) is provided at the end of the rotating support shaft (82) and is connected to the meshing linkage device (5) by a spline (84).

5. A tightening device for setting a screw according to claim 3, characterized in that: A displacement sensor bracket (314) is provided on the side of the engagement device fixing seat (31), the displacement sensor bracket (314) is arranged in close contact with the side plate of the frame (1), and a displacement sensor (315) is provided on the displacement sensor bracket (314).

6. A tightening device for setting a screw according to claim 3, characterized in that: A proximity switch mounting plate (316) is provided on the engagement device fixing seat (31), and a proximity switch (317) is provided on the proximity switch mounting plate (316).

7. A tightening device for setting a screw according to claim 1, characterized in that: The frame (1) is a shell-like structure, capable of covering the anti-floating meshing device (3) and the meshing linkage device (5).

8. A tightening device for setting a screw according to claim 4, characterized in that: A valve island (11) is provided on a side plate of the frame (1) below the servo motor (81), and a plurality of valves are provided on the valve island (11) for controlling the movement of the cylinder.

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