Handheld servo riveter

Abstract

The invention relates to the technical field of riveting devices, and discloses a handheld servo riveter which comprises a riveter body, a frameless motor is fixedly arranged on one side of the riveter body, a connecting shaft is in transmission connection with the inner side of the frameless motor, an inner screw is fixedly connected to one end of the connecting shaft, a driving mechanism is arranged on the inner side of the riveter body, and the driving mechanism is arranged on the inner side of the riveter body. A fixing sleeve is fixedly arranged on one side of the gun body, a plurality of pressure sensors are fixedly arranged on one side of the fixing sleeve, and the frameless motor is matched with the connecting shaft to drive the inner screw to be connected with the rivet nut in a sleeved mode. According to the riveting device, the perpendicularity of the rivet nut is detected before the riveting action is performed through servo feedback of the pressure sensor and the frameless motor, so that the subsequent riveting quality is ensured, and the air tightness detection of riveting is performed by filling air in the first fixing cylinder into the space among the fixing sleeve, the rivet nut and the riveting piece after the riveting action; subsequent detection procedures are reduced, and later product tracing is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of riveting devices, and in particular to a handheld servo riveting gun. Background Art

[0002] In the process of processing and fastening various metal plates or pipes and other industrial workpieces, it is necessary to use a servo rivet gun to draw and fasten the rivet nut and the part to be riveted without tapping the internal thread. The existing servo rivet gun includes a servo motor, which drives the rivet gun screw to rotate through the cooperation of the servo motor and the transmission mechanism. The rivet nut is first sleeved with the screw, so that the rivet nut only moves axially relative to the screw until it contacts the gun head, and then the screw is driven to move axially relative to the gun body. The screw drives the sleeved part of the rivet nut to move toward the gun head, and the gun head abuts against the end face of the rivet nut, so that the thin-walled area of ​​the rivet nut is deformed on the back of the part to be riveted into a circular shape to abut against the riveted part, completing the riveting of the rivet nut and the riveted part.

[0003] However, when using a traditional servo rivet gun, it is difficult to ensure that the axis of the rivet nut is parallel to the axis of the rivet hole when the rivet nut is pressed against the workpiece to be riveted by a person holding the servo rivet gun manually. As a result, the thin wall of the rivet nut cannot maintain contact with the riveted surface after deformation, affecting the quality of the riveting. This results in a decrease in the yield rate of the product when the servo rivet gun is used to tighten the workpiece under the conditions where the riveting quality needs to be stable and the contact surface between the rivet nut and the riveted workpiece needs to have good airtightness. Summary of the invention

[0004] The present application proposes a handheld servo riveting gun, which has the advantages of detecting the verticality of the rivet nut before riveting and facilitating the detection of the air tightness of the fitting surface between the rivet nut and the riveted part, so as to solve the problem that it is difficult for a manual handheld servo riveting gun to ensure that the axis of the rivet nut is perpendicular to the riveted surface before riveting.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a handheld servo rivet gun, comprising a gun body, a frameless motor is fixedly arranged on one side of the gun body, a connecting shaft is transmission-connected to the inner side of the frameless motor, one end of the connecting shaft is fixedly connected to an inner screw, a driving mechanism is arranged on the inner side of the gun body, a fixing sleeve is fixedly arranged on one side of the gun body, and a plurality of pressure sensors are fixedly arranged on one side of the fixing sleeve.

[0006] The frameless motor cooperates with the connecting shaft to drive the inner screw and the rivet nut to be sleeved, the pressure sensor is used to detect the pressure value between the fixing sleeve and the fitting surface of the riveted part, and the driving mechanism starts the riveting action when the servo feedback value of the frameless motor and the feedback value of the pressure sensor are within the rated range, and the driving mechanism is used to drive the screw to move axially.

[0007] Furthermore, the driving mechanism includes a moving cylinder, which is rotatably connected to the connecting shaft, one end of the moving cylinder is fixedly connected to a moving screw, one side of the inner wall of the gun body is fixedly connected to a No. 3 support plate, the No. 3 support plate is slidingly sleeved with the moving cylinder, one side of the inner wall of the gun body is fixedly connected to a No. 1 support plate, the bottom of the No. 1 support plate is rotatably sleeved with a rotating nut, and the rotating nut is threadedly sleeved with the moving screw.

[0008] The movable cylinder is driven to move axially by rotating the nut in coordination with the movable screw rod, and the third support plate limits the relative rotation of the movable cylinder 7.

[0009] Furthermore, a No. 2 support plate is fixedly provided on one side of the inner wall of the gun body, a No. 1 fixing tube is fixedly connected to the top of the No. 2 support plate, an air pressure sensor is fixedly provided on one side of the fixing sleeve, a connecting pipe is fixedly connected to the middle position of the top of the No. 1 fixing tube, and an air supply mechanism is provided in the No. 1 fixing tube, which can fill the gas in the cavity of the No. 1 fixing tube into the inner side of the cavity surrounded by the rivet nut, the rivet part and the fixing sleeve through the connecting pipe after the riveting action is completed.

[0010] The sealing performance of the riveting is tested by pressurizing the cavity between the rivet nut, the rivet member 12 and the fixing sleeve to determine whether the gas can pass through the gap between the rivet nut and the rivet member 12.

[0011] Further, the air supply mechanism comprises a No. 1 sliding plug, the No. 1 sliding plug is slidably sleeved with the inner side of the No. 1 fixed cylinder, one side of the No. 1 sliding plug is fixedly connected with a No. 1 connecting rod, the No. 1 connecting rod is fixedly connected with the moving cylinder, and one side of the No. 1 fixed cylinder is provided with an air vent; One side of the bottom of the No. 1 fixed cylinder is fixedly connected to an No. 1 air inlet pipe, and a one-way valve is fixedly provided on the tube body of the No. 1 air inlet pipe. The No. 1 air inlet pipe cooperates with the one-way valve to allow air to enter the cavity of the No. 1 fixed cylinder through the No. 1 air inlet pipe in one direction. One side of the No. 1 fixed cylinder is fixedly connected to an elastic air bag, and one side of the No. 1 sliding plug is fixedly connected to a sealing plate for closing the opening of the connecting pipe, and a through hole is opened on one side of the sealing plate.

[0012] The movable cylinder moves in coordination with the No. 1 connecting rod to drive the sliding plug to compress the gas during the riveting process, so that the elastic airbag stores energy. After the riveting action is completed, the elastic airbag releases the energy to provide air pressure.

[0013] Furthermore, an outer screw is rotatably engaged at one side of the gun body, a movable sleeve is sleeved on the outer thread of the outer screw, the movable sleeve is slidably engaged with the fixed sleeve, the outer screw is slidably engaged with the inner screw, and a cleaning mechanism is provided at one side of the gun body, which can provide gas to pass through the engagement gap between the inner screw and the rivet nut during the process of the inner screw pushing out the rivet nut.

[0014] The movable sleeve is kept in contact with the end surface of the rivet nut during the process of sleeve connection and separation between the rivet nut and the inner screw, thereby ensuring that the inner screw can be cleaned during the process of separation of the inner screw.

[0015] Further, the cleaning mechanism comprises a No. 2 fixed cylinder, the No. 2 fixed cylinder is fixedly connected to the No. 1 fixed cylinder, a through hole is opened on one side of the No. 2 fixed cylinder, a No. 2 sliding plug is slidably sleeved on the inner side of the No. 2 fixed cylinder, and a No. 2 connecting rod is fixedly connected to one side of the No. 2 sliding plug; A fixed pipe is fixedly connected to one side of the No. 2 fixed barrel, a No. 2 air inlet pipe is fixedly connected to one side of the top of the No. 2 fixed barrel, a one-way valve is fixedly provided on the tube body of the No. 2 air inlet pipe, and the No. 2 air inlet pipe cooperates with the one-way valve to allow air to enter the cavity of the No. 2 fixed barrel through the No. 2 air inlet pipe in one direction, a moving pipe is fixedly sleeved on the bottom of the moving sleeve, and the moving pipe is slidably sleeved with the fixed pipe, a fixed block is fixedly provided on one side of the gun body, and the fixed block is slidably sleeved with the moving barrel.

[0016] The connecting shaft drives the No. 2 connecting rod to move, so that the process of the No. 2 sliding plug compressing the No. 2 fixed cylinder matches the movement of the inner screw rod disengaging from the rivet nut, and the movable tube follows the movement of the movable sleeve and remains connected with the axial movement of the fixed tube.

[0017] Furthermore, the number of the No. 3 support plates is set to two, a rotating sleeve is rotatably provided on the top of the No. 3 support plate, the rotating sleeve and the connecting shaft are slidably engaged, a moving block is movably provided on the outer side of the rotating sleeve, a moving rod is fixedly connected to one side of the moving block, the moving rod is fixedly connected to the No. 2 connecting rod, the moving rod is slidably connected to the No. 3 support plate, a guide block is fixedly provided on the inner side of the moving block, a guide groove is provided on the outer side of the rotating sleeve, the guide groove is spiral-shaped and the pitch of the spiral increases in the axial direction.

[0018] The rotating sleeve is rotated at a rated speed to drive the moving block to move at different speeds in the axial direction, so that the speed at which the No. 2 sliding plug compresses the No. 2 fixed cylinder is adapted to the length of the bite area between the inner screw and the rivet nut.

[0019] Furthermore, a sliding cavity is provided on one side of the movable sleeve, a sealing block is slidably provided inside the sliding cavity, the sealing block is used to seal the gap between the rivet nut and the movable sleeve, and a connecting hole is provided on the top of the inner wall of the sliding cavity.

[0020] The sealing block is lifted up by air pressure to open the connecting hole, ensuring that the sealing block seals the gap between the moving sleeve and the rivet nut when the inner screw is separated from the rivet nut.

[0021] Furthermore, the outer wall diameter of one side of the movable sleeve is matched with the inner diameter of the rivet nut, and an elastic diaphragm is fixedly provided on one side of the movable sleeve.

[0022] The elastic diaphragm provides additional friction and reduces the possibility of synchronous rotation during the process of the rivet nut sleeved on the internal screw.

[0023] Furthermore, a servo motor is fixedly arranged on one side of the gun body, a reducer is fixedly arranged on one side of the gun body, and a switch is arranged on the bottom of the gun body.

[0024] The switch starts the process of sleeve connection between the inner screw and the rivet nut, pull riveting, and separation of the inner screw and the rivet nut.

[0025] The beneficial effects of the present invention are as follows: The present application provides a handheld servo riveter gun, which detects the verticality of the rivet nut and the riveted part and the socket position of the rivet nut before performing the riveting action through the cooperation of the servo feedback of the frameless motor and the pressure sensor, so that the riveting action is performed when the gun body is perpendicular to the riveted part, thereby ensuring the riveting quality effect of the servo riveter gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic cross-sectional diagram of the overall structure of this application; Figure 3 This is a schematic cross-sectional diagram of the internal screw and rivet nut structure of this application; Figure 4 For this application Figure 3 A magnified view of the structure at A; Figure 5 This is a schematic cross-sectional view of the structure of the moving cylinder of this application; Figure 6 For this application Figure 5 A magnified view of the structure at B in FIG. Figure 7 This is a schematic diagram of the connection relationship between the movable sleeve and the fixed sleeve of this application.

[0027] In the figure: 1-gun body, 2-frameless motor, 3-connecting shaft, 4-inner screw, 5-servo motor, 6-reducer, 7-moving cylinder, 8-rotating screw nut, 9-moving screw, 10-No. 1 support plate, 11-rivet nut, 12-rivet part, 13-switch, 14-pressure sensor, 15-connecting pipe, 16-No. 1 fixed cylinder, 17-No. 1 connecting rod, 18-No. 1 sliding plug, 19-No. 1 intake pipe, 20-No. 2 support plate, 21-fixed sleeve, 22-moving sleeve, 23 -external screw, 24-air pressure sensor, 25-moving tube, 26-fixed tube, 27-No. 2 fixed tube, 28-No. 2 sliding plug, 29-No. 2 connecting rod, 30-No. 2 air inlet pipe, 31-fixed block, 32-sliding cavity, 33-sealing block, 34-connecting hole, 35-elastic diaphragm, 36-No. 3 support plate, 37-rotating sleeve, 38-moving block, 39-guide groove, 40-guide block, 41-moving rod, 42-elastic airbag, 43-sealing plate, 44-vent. DETAILED DESCRIPTION

[0028] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0029] Embodiment 1, as Figure 1-Figure 5 and Figure 7 A handheld servo riveting gun comprises a gun body 1, a frameless motor 2 is fixedly arranged on one side of the gun body 1, and a connecting shaft 3 is transmission-connected to the inner side of the frameless motor 2. Specifically, the stator of the frameless motor 2 is fixedly connected to the inner wall of the gun body 1, the rotor of the frameless motor 2 is fixedly sleeved with a shaft sleeve, the inner side of the shaft sleeve is fixedly sleeved with the connecting shaft 3, one end of the connecting shaft 3 is fixedly connected with an inner screw 4, and the other end of the connecting shaft 3 is rotatably clamped with a moving cylinder 7 for driving the inner screw 4 to move axially, and one end of the moving cylinder 7 is fixedly connected with a moving screw 9, see Figure 5 A third support plate 36 is fixedly connected to one side of the inner wall of the gun body 1 , and the third support plate 36 is slidably sleeved with the moving cylinder 7 , and the third support plate 36 limits the moving cylinder 7 from rotating relative to the gun body 1 .

[0030] See also Figure 2A support plate No. 10 is fixedly connected to one side of the inner wall of the gun body 1, and a rotating nut 8 is rotatably sleeved on the bottom of the support plate No. 10. The rotating nut 8 is threadedly sleeved with a movable screw rod 9, and the rotating nut 8 can be set as a ball nut. A servo motor 5 is fixedly set on one side of the gun body 1, and a reducer 6 is fixedly set on one side of the gun body 1. The output end of the servo motor 5 is transmission-connected with the input end of the reducer 6, and the output end of the reducer 6 is transmission-connected with the rotating nut 8 through a rotating shaft. A switch 13 is set at the bottom of the gun body 1, and a fixed sleeve 21 is fixedly set on one side of the gun body 1. A pressure sensor 14 is fixedly set on one side of the fixed sleeve 21. The number of pressure sensors 14 is set to several and several pressure sensors 14 are evenly arranged on the fixed sleeve 21.

[0031] See also Figure 3 When in use, place the rivet nut 11 into the through hole of the part 12 to be riveted, hold the gun body 1, extend the inner screw 4 into the screw hole of the rivet nut 11, start the switch 13, and the frameless motor 2 rotates. The frameless motor 2 drives the inner screw 4 to rotate, so that the inner screw 4 and the threaded part of the rivet nut 11 are engaged in a threaded sleeve manner, and the inner screw 4 extends into the rivet nut 11 until the rivet nut 11 moves axially relative to the inner screw 4 to contact the fixed sleeve 21. According to the servo feedback of the frameless motor 2, it is determined whether the end face of the rivet nut 11 is in contact with the side wall of the fixed sleeve 21, and the pressure sensor 14 is in contact with the part 12 to be riveted, and it is determined whether the difference in feedback values ​​of different pressure sensors 14 exceeds the threshold value, so as to ensure that before the riveting action is performed, it is determined whether the axis of the inner screw 4 of the handheld servo riveting gun is perpendicular to the part 12 to be riveted, so as to adjust the angle of holding the gun body 1 according to the feedback value to ensure the quality of the riveting.

[0032] When the difference is less than the threshold value and the end face of the rivet nut 11 fits with the side wall of the fixed sleeve 21, the inner screw 4 drives the axis of the rivet nut 11 to be perpendicular to the end face of the part to be riveted 12, the frameless motor 2 stops outputting, the servo motor 5 starts, and the servo motor 5 cooperates with the reducer 6 to drive the rotating nut 8 to rotate, and the rotating nut 8 drives the moving screw 9 to move axially, and the moving screw 9 moves to drive the moving cylinder 7 to move, and the moving cylinder 7 drives the connecting shaft 3 to move, and the connecting shaft 3 drives the inner screw 4 to move and shrink into the gun body 1, and the inner screw 4 moves to drive the threaded part of the rivet nut 11 to move toward one side of the riveted part 12, and one side end face of the rivet nut 11 abuts against the side wall of the fixed sleeve 21, so that the thin wall of the rivet nut 11 is deformed under the action of the pull riveting, and the riveting of the rivet nut 11 and the riveted part 12 is completed.

[0033] See also Figure 5A second support plate 20 is fixedly arranged on one side of the inner wall of the gun body 1, and a first fixed cylinder 16 is fixedly connected to the top of the second support plate 20. A first sliding plug 18 is slidably sleeved on the inner side of the first fixed cylinder 16. A first connecting rod 17 is fixedly connected to one side of the first sliding plug 18 at the midpoint position. The first connecting rod 17 is fixedly connected to the moving cylinder 7. Figure 5 A vent hole 44 is provided on one side of the No. 1 fixed cylinder 16, and a No. 1 air inlet pipe 19 is fixedly connected to one side of the bottom of the No. 1 fixed cylinder 16. A one-way valve is fixedly provided on the body of the No. 1 air inlet pipe 19. The No. 1 air inlet pipe 19 cooperates with the one-way valve to allow air to enter the cavity of the No. 1 fixed cylinder 16 through the No. 1 air inlet pipe 19 in one direction. A connecting pipe 15 is fixedly connected to the middle position of the top of the No. 1 fixed cylinder 16, and an elastic air bag 42 is fixedly connected to one side of the No. 1 fixed cylinder 16. A sealing plate 43 for closing the opening of the connecting pipe 15 is fixedly connected to one side of the No. 1 sliding plug 18, and a through hole is provided on one side of the sealing plate 43. The vent holes 44 and the elastic air bag 42 are respectively arranged on both sides of the No. 1 fixed cylinder 16, and the No. 1 sliding plug 18 separates the cavity of the No. 1 fixed cylinder 16 on which the vent holes 44 and the elastic air bag 42 are respectively provided.

[0034] See also Figure 5 , Figure 7 Two sealing members are arranged on one side of the fixing sleeve 21, and the sealing members can be arranged as O-rings. When the rivet nut 11 contacts the fixing sleeve 21, a seal is formed between the fixing sleeve 21 and the rivet nut 11, and between the fixing sleeve 21 and the workpiece 12 to be riveted. One end of the connecting tube 15 is fixedly sleeved with the fixing sleeve 21. When the riveting action is performed, the moving cylinder 7 moves to drive the No. 1 connecting rod 17 to move, and the No. 1 connecting rod 17 drives the No. 1 sliding plug 18 to move. The No. 1 sliding plug 18 moves to press the gas in the cavity of the No. 1 fixing cylinder 16 into the elastic airbag 42 until the through hole of the sealing plate 43 is closed. The position corresponds to the opening position of the connecting tube 15, and the elastic airbag 42 contracts, so that after the riveting action is completed, the gas is pressed into the inner side of the cavity surrounded by the to-be-riveted part 12, the rivet nut 11 and the fixing sleeve 21. An air pressure sensor 24 is fixedly arranged on one side of the fixing sleeve 21. According to the gas pressure value fed back by the air pressure sensor 24, it is judged whether the gas passes through the contact surface between the rivet nut 11 and the to-be-riveted part 12, and then the air sealing performance between the rivet nut 11 and the riveted part 12 after riveting is judged, which is convenient for detecting the air sealing performance of each riveting position and facilitating the subsequent product traceability.

[0035] When the inner screw 4 and the rivet nut 11 are riveted in the case of threaded sleeve connection, small debris is easily attached to the inner screw 4. After long-term use, the accumulated debris is likely to cause the threaded sleeve connection process between the inner screw 4 and the rivet nut 11 to be blocked, causing an error in the feedback value of the frameless motor 2, resulting in the possibility that the end face of the rivet nut 11 is not in contact with the fixing sleeve 21 during the riveting action, affecting the quality of the riveting, causing the feedback of the pressure sensor 14 to fail, and easily affecting the subsequent sealing between the fixing sleeve 21 and the rivet nut 11 and the riveted part 12.

[0036] Embodiment 2, as Figure 1-Figure 7 On the basis of the first embodiment, an outer screw 23 is rotatably connected to one side of the gun body 1. The outer screw 23 can only rotate relative to the gun body 1. The outer thread of the outer screw 23 is connected to the movable sleeve 22. Figure 7 The movable sleeve 22 is slidably connected with the fixed sleeve 21. The movable sleeve 22 can only slide in the axial direction relative to the fixed sleeve 21. The outer screw 23 is slidably connected with the inner screw 4 through a flat key. The inner screw 4 can move axially relative to the outer screw 23 and can drive the outer screw 23 to rotate. Figure 5 A second fixing tube 27 is fixedly connected to one side of the first fixing tube 16 , and a through hole is opened on one side of the second fixing tube 27 .

[0037] A No. 2 sliding plug 28 is slidably sleeved on the inner side of the No. 2 fixed cylinder 27, a No. 2 connecting rod 29 is fixedly connected to one side of the No. 2 fixed cylinder 27, a No. 2 fixed pipe 26 is fixedly connected to one side of the No. 2 fixed cylinder 27, a No. 2 air inlet pipe 30 is fixedly connected to one side of the top of the No. 2 fixed cylinder 27, a one-way valve is fixedly provided on the body of the No. 2 air inlet pipe 30, and the No. 2 air inlet pipe 30 cooperates with the one-way valve to allow air to enter the cavity of the No. 2 fixed cylinder 27 through the No. 2 air inlet pipe 30 in one direction, see Figure 3 A moving tube 25 is fixedly sleeved at the bottom of the moving sleeve 22, and the moving tube 25 is slidably sleeved with the fixed tube 26. A fixed block 31 is fixedly provided on one side of the gun body 1, and the fixed block 31 is slidably sleeved with the moving tube 7. A sliding sealing mechanism is provided between the fixed block 31 and the moving tube 7, and the sliding sealing mechanism can be set as an O-ring.

[0038] When the inner screw 4 is against the threaded part of the rivet nut 11, the movable sleeve 22 fits with the end face of the rivet nut 11, and the inner screw 4 rotates to complete the sleeve connection with the rivet nut 11. At this time, the rotation of the inner screw 4 drives the outer screw 23 to rotate, and the rotation of the outer screw 23 drives the movable sleeve 22 to move axially relative to the fixed sleeve 21. The rivet nut 11 approaches the gun body 1, and the fixed sleeve 21 moves to one side of the gun body 1 synchronously. The fixed sleeve 21 always keeps in contact with the rivet nut 11 until the inner screw 4 completes the sleeve connection with the rivet nut 11. At this time, the side wall of the gun body 1 is against the movable sleeve 22, and the gun body 1 cooperates with the movable sleeve 22 to provide support for the rivet nut 11 during the riveting action.

[0039] After the riveting is completed, the inner screw 4 rotates to disengage from the rivet nut 11. At this time, the No. 2 connecting rod 29 moves to drive the No. 2 sliding plug 28 to move. The No. 2 sliding plug 28 passes the air in the cavity through the fixed tube 26 and the movable tube 25 into the cavity between the movable sleeve 22 and the rivet nut 11, so that the gas can pass through the thread gap between the inner screw 4 and the rivet nut 11, thereby using the airflow to clean the surface of the inner screw 4, ensuring smooth transmission of the inner screw 4 and the rivet nut 11, ensuring the accuracy of the servo feedback value of the frameless motor 2, avoiding the deviation of the feedback value of the pressure sensor 14, ensuring the quality of subsequent riveting and the stability of airtightness detection, reducing the additional wear of the inner screw 4, and improving the reliability of the servo riveting gun. The thread locking force between the inner screw 4 and the rivet nut 11 is used to ensure the fit between the fixed sleeve 22 and the rivet nut 11 during the cleaning process, which is convenient for hand-held operation.

[0040] Specifically, the number of the third support plate 36 is set to two, and the top of the third support plate 36 is rotatably provided with a rotating sleeve 37, see Figure 6 The rotating sleeve 37 and the connecting shaft 3 are slidably connected in a flat key manner. The connecting shaft 3 can slide axially relative to the rotating sleeve 37 and can drive the rotating sleeve 37 to rotate. A moving block 38 is movably provided on the outer side of the rotating sleeve 37. A moving rod 41 is fixedly connected to one side of the moving block 38. The moving rod 41 is L-shaped and fixedly connected to the second connecting rod 29. The moving rod 41 is slidably connected to the third support plate 36. The third support plate 36 limits the rotation of the moving rod 41. A guide block 40 is fixedly provided on the inner side of the moving block 38. A guide groove 39 is provided on the outer side of the rotating sleeve 37. The guide groove 39 is spiral and the pitch of the spiral increases in the axial direction. That is, the rated angle of rotation of the connecting shaft 3 cooperates with the guide block 40 to drive the rotating sleeve 37 to gradually increase its rotation angle.

[0041] The rotation of the rotating sleeve 37 drives the guide block 40 to slide along the guide groove 39, thereby driving the moving block 38 to move, the moving block 38 drives the moving rod 41 to move, and the moving rod 41 drives the No. 2 connecting rod 29 to move, thereby pressing the gas in the cavity of the No. 2 fixed cylinder 27 into the moving sleeve 22 to clean the inner screw 4. During the process of the inner screw 4 pushing the rivet nut 11, the gun body 1 is away from the rivet nut 11. At this time, the inner screw 4 cooperates with the outer screw 23 to drive the moving sleeve 22 to move, so that the moving sleeve 22 maintains the fit with the rivet nut 11. The axial movement of the guide block 40 gradually increases under the guiding action of the guide groove 39, so that the air supply is increased when the length of the threaded sleeve connection part of the inner screw 4 and the rivet nut 11 is reduced, so as to ensure that the air supply is increased when the thread gap between the inner screw 4 and the rivet nut 11 is reduced, and the air flow is increased when the gas is easier to pass through the thread gap to ensure the cleaning efficiency.

[0042] See also Figure 4A sliding cavity 32 is provided on one side of the movable sleeve 22, and a sealing block 33 is slidingly provided on the inner side of the sliding cavity 32. The sealing block 33 is used to seal the gap between the rivet nut 11 and the movable sleeve 22. A connecting hole 34 is provided on the top of the inner wall of the sliding cavity 32. The connecting hole 34 is used to discharge the gas in the sliding cavity 32 to clean the debris of the inner screw 4. After the gas in the No. 2 fixed cylinder 27 passes through the fixed tube 26 and the movable tube 25, it enters the sliding cavity 32, pushes the sealing block 33 out of the movable sleeve 22, and at the same time, the sealing block 33 removes the obstruction of the connecting hole 34. In the process of the inner screw 4 withdrawing from the rivet nut 11, the air pressure is used to increase the sealing pressure of the sealing block 33, so as to ensure the sealing reliability between the rivet nut 11 and the movable sleeve 22 and the cleaning effect of the inner screw 4.

[0043] The outer wall diameter of one side of the movable sleeve 22 is adapted to the inner diameter of the rivet nut 11, which is convenient for positioning the movable sleeve 22 and the rivet nut 11. An elastic diaphragm 35 is fixedly provided on one side of the movable sleeve 22. When the movable sleeve 22 extends into the inner side of the rivet nut 11, the elastic diaphragm 35 abuts against the inner wall of the rivet nut 11 to provide additional friction force, thereby preventing the rivet nut 11 from rotating with the inner screw 4 during the process of being sleeved with the inner screw 4, thereby ensuring the fit between the rivet nut 11 and the movable sleeve 22, and further improving the reliability of the use of the servo riveting gun.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A handheld servo riveting gun, comprising a gun body (1), characterized in that: A frameless motor (2) is fixedly disposed on one side of the gun body (1); a connecting shaft (3) is transmission-connected to the inner side of the frameless motor (2); an inner screw (4) is fixedly connected to one end of the connecting shaft (3); a driving mechanism is disposed on the inner side of the gun body (1); a fixing sleeve (21) is fixedly disposed on one side of the gun body (1); and a plurality of pressure sensors (14) are fixedly disposed on one side of the fixing sleeve (21); The frameless motor (2) cooperates with the connecting shaft (3) to drive the inner screw (4) and the rivet nut (11) to be sleeved together, the pressure sensor (14) is used to detect the pressure value between the fixing sleeve (21) and the contact surface of the part to be riveted (12), the driving mechanism starts the riveting action when the servo feedback value of the frameless motor (2) and the feedback value of the pressure sensor (14) are within the rated range, and the driving mechanism is used to drive the screw (4) to move axially.

2. A handheld servo riveter according to claim 1, characterized in that: The driving mechanism comprises a moving cylinder (7), the moving cylinder (7) being rotatably engaged with the connecting shaft (3), one end of the moving cylinder (7) being fixedly connected with a moving screw (9), one side of the inner wall of the gun body (1) being fixedly connected with a third support plate (36), the third support plate (36) being slidably sleeved with the moving cylinder (7), one side of the inner wall of the gun body (1) being fixedly connected with a first support plate (10), the bottom of the first support plate (10) being rotatably sleeved with a rotating nut (8), the rotating nut (8) being threadedly sleeved with the moving screw (9).

3. A handheld servo riveter according to claim 2, characterized in that: A No. 2 support plate (20) is fixedly provided on one side of the inner wall of the gun body (1), a No. 1 fixing tube (16) is fixedly connected to the top of the No. 2 support plate (20), a pressure sensor (24) is fixedly provided on one side of the fixing sleeve (21), a connecting pipe (15) is fixedly connected to the middle of the top of the No. 1 fixing tube (16), and an air supply mechanism is provided in the No. 1 fixing tube (16), and the air supply mechanism can fill the gas in the cavity of the No. 1 fixing tube (16) into the inner side of the cavity surrounded by the rivet nut (11), the rivet member (12) and the fixing sleeve (21) through the connecting pipe (15) after the riveting action is completed.

4. A handheld servo riveter according to claim 3, characterized in that: The air supply mechanism comprises a No. 1 sliding plug (18), the No. 1 sliding plug (18) being slidably sleeved on the inner side of a No. 1 fixed cylinder (16), one side of the No. 1 sliding plug (18) being fixedly connected to a No. 1 connecting rod (17), the No. 1 connecting rod (17) being fixedly connected to the moving cylinder (7), and one side of the No. 1 fixed cylinder (16) being provided with an air vent (44); One side of the bottom of the No. 1 fixed cylinder (16) is fixedly connected to a No. 1 air intake pipe (19), and a one-way valve is fixedly provided on the tube body of the No. 1 air intake pipe (19). The No. 1 air intake pipe (19) cooperates with the one-way valve to allow air to enter the cavity of the No. 1 fixed cylinder (16) through the No. 1 air intake pipe (19) in one direction. One side of the No. 1 fixed cylinder (16) is fixedly connected to an elastic air bag (42), and one side of the No. 1 sliding plug (18) is fixedly connected to a sealing plate (43) for closing the opening of the connecting tube (15), and one side of the sealing plate (43) is provided with a through hole.

5. A handheld servo riveter according to claim 2, characterized in that: An outer screw (23) is rotatably engaged with one side of the gun body (1), a movable sleeve (22) is sleeved on the outer thread of the outer screw (23), the movable sleeve (22) is slidably engaged with the fixed sleeve (21), and the outer screw (23) is slidably engaged with the inner screw (4). A cleaning mechanism is provided on one side of the gun body (1), and the cleaning mechanism can provide gas to pass through the interlocking gap between the inner screw (4) and the rivet nut (11) during the process of the inner screw (4) pushing out the rivet nut (11).

6. A handheld servo riveter according to claim 5, characterized in that: The cleaning mechanism comprises a No. 2 fixed cylinder (27), the No. 2 fixed cylinder (27) being fixedly connected to the No. 1 fixed cylinder (16), a through hole being provided on one side of the No. 2 fixed cylinder (27), a No. 2 sliding plug (28) being slidably sleeved on the inner side of the No. 2 fixed cylinder (27), and a No. 2 connecting rod (29) being fixedly connected to one side of the No. 2 sliding plug (28); One side of the No. 2 fixed cylinder (27) is fixedly connected to a fixed pipe (26), one side of the top of the No. 2 fixed cylinder (27) is fixedly connected to a No. 2 air intake pipe (30), a tube body of the No. 2 air intake pipe (30) is fixedly provided with a one-way valve, the No. 2 air intake pipe (30) cooperates with the one-way valve to allow air to enter the cavity of the No. 2 fixed cylinder (27) through the No. 2 air intake pipe (30) in one direction, the bottom of the movable sleeve (22) is fixedly sleeved with a movable pipe (25), the movable pipe (25) and the fixed pipe (26) are slidably sleeved, and one side of the gun body (1) is fixedly provided with a fixed block (31), the fixed block (31) and the movable cylinder (7) are slidably sleeved.

7. A handheld servo riveter according to claim 6, characterized in that: The number of the third support plate (36) is set to two, a rotating sleeve (37) is rotatably provided on the top of the third support plate (36), the rotating sleeve (37) and the connecting shaft (3) are slidably engaged, a moving block (38) is movably provided on the outer side of the rotating sleeve (37), a moving rod (41) is fixedly connected to one side of the moving block (38), the moving rod (41) is fixedly connected to the second connecting rod (29), the moving rod (41) is slidably connected to the third support plate (36), a guide block (40) is fixedly provided on the inner side of the moving block (38), a guide groove (39) is provided on the outer side of the rotating sleeve (37), the guide groove (39) is spiral-shaped, and the pitch of the spiral increases in the axial direction.

8. The handheld servo riveter according to claim 6, characterized in that: A sliding cavity (32) is provided on one side of the movable sleeve (22), a sealing block (33) is slidably provided inside the sliding cavity (32), the sealing block (33) being used to seal the gap between the rivet nut (11) and the movable sleeve (22), and a connecting hole (34) is provided on the top of the inner wall of the sliding cavity (32).

9. The handheld servo riveter according to claim 6, characterized in that: The diameter of an outer wall of one side of the movable sleeve (22) is matched to the inner diameter of the rivet nut (11), and an elastic diaphragm (35) is fixedly provided on one side of the movable sleeve (22).

10. The handheld servo riveter according to claim 1, characterized in that: A servo motor (5) is fixedly disposed on one side of the gun body (1), a reducer (6) is fixedly disposed on one side of the gun body (1), and a switch (13) is disposed at the bottom of the gun body (1).

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