Electric hand riveter

Abstract

The invention discloses an electric hand riveter. The electric hand riveter comprises a shell assembly; an annular pressure sensor is arranged on a telescopic shaft of the electric cylinder; a bearing sleeve; the upper end of the upper transmission shaft is rotatably arranged in the bearing seat sleeve, a driven gear is fixed on the transmission shaft, and a proximity switch is arranged at the top of the upper transmission shaft; a driving gear on an output shaft of the motor is meshed with the driven gear; the upper end of the transmission sleeve is connected with the lower end of the upper transmission shaft; the upper end of the middle transmission shaft is hung at the lower end of the inner wall of the transmission sleeve, a movable gap is reserved between the middle transmission shaft and the transmission sleeve, and a trigger is arranged at the top of the middle transmission shaft; a lower transmission shaft; the top of the rotation stopping pin is elastically connected with the lower transmission shaft; the rivet pulling rod and the rotation stopping pin can rotate synchronously; the rivet pulling rod is sleeved with the second reset spring, and the upper end of the second reset spring abuts against the bottom of the lower transmission shaft. The electric cylinder is used for replacing a hydraulic cylinder, oil leakage is avoided, the size is small, transmission is stable, whether pulling force needed during rivet pulling is within a reasonable range or not can be monitored in real time, and the rivet pulling quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of basic non-cutting machining or processing of metal plates, tubes, rods or profiles, and particularly to an electric riveting gun. Background Technology

[0002] A rivet gun is a tool used for fastening and riveting processes. It deforms the rivet by applying tension, thereby firmly joining metal sheets, tubular profiles, and other components together. Traditionally, rivet guns used hydraulic cylinders to move the rivet rod axially, and pneumatic motors to rotate the rivet rod, thus achieving the pulling and rotating action of the rivet. However, hydraulic cylinders require hydraulic hoses, which are prone to oil leaks. Therefore, rivet guns using electric cylinders and motors as the drive source have emerged on the market, such as the servo rivet gun disclosed on November 26, 2024, under CN119016609A. However, relying solely on an electric cylinder and motor for drive cannot provide real-time feedback on the riveting process, thus compromising quality. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide an electric rivet gun that is compact, simple in structure, stable in transmission, leak-free, and capable of detecting the rivet status.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: an electric rivet gun, comprising:

[0005] Housing assembly;

[0006] An electric cylinder is mounted on the upper end of the housing assembly, and an annular pressure sensor is provided on the telescopic shaft of the electric cylinder.

[0007] The bearing housing sleeve is located inside the housing assembly, and its upper end is connected and fixed to the end of the telescopic shaft of the electric cylinder. The bearing housing sleeve can move up and down back and forth.

[0008] An upper drive shaft, the upper end of which is rotatably disposed in the lower half of the bearing housing, the lower end of which extends out of the bearing housing, a driven gear is fixed on the upper drive shaft extending out of the bearing housing, and a proximity switch is provided on the top of the upper drive shaft.

[0009] The motor is fixedly mounted on the housing assembly, and a drive gear is provided on the output shaft of the motor, which meshes with a driven gear;

[0010] A transmission sleeve, the upper end of which is threadedly connected to the lower end of the upper transmission shaft;

[0011] The middle drive shaft has its upper end hanging on the lower end of the inner wall of the transmission sleeve, with a movable gap between them. The top of the middle drive shaft is inserted into the bottom of the upper drive shaft. The middle drive shaft can move within the movable gap. A trigger body is provided on the top of the middle drive shaft. The trigger body passes through the upper drive shaft and can move toward the proximity switch.

[0012] The lower drive shaft has its upper end threadedly connected to the lower end of the middle drive shaft.

[0013] An anti-rotation pin, the top of which is elastically connected to the lower drive shaft;

[0014] A rivet rod is provided, the top of which is into which the bottom of an anti-rotation pin is inserted. The anti-rotation pin and the rivet rod can move up and down relative to each other in the axial direction. The rivet rod and the anti-rotation pin can rotate synchronously. The outer wall of the upper end of the rivet rod is threadedly connected to the inner wall of the lower end of the lower drive shaft. The lower end of the rivet rod extends out of the bottom of the housing assembly.

[0015] The second return spring is sleeved on the rivet rod, with its upper end abutting the bottom of the lower drive shaft and its lower end limited to the inner wall of the housing assembly.

[0016] Preferably, the housing assembly includes:

[0017] A tubular housing, wherein the bearing housing is located inside the tubular housing;

[0018] A gearbox housing is detachably mounted on the lower end of a tubular housing. The lower end of the upper drive shaft passes through the gearbox housing. The driven gear is located inside the gearbox housing. The motor is mounted on one side of the gearbox housing.

[0019] A conical sleeve housing is installed at the bottom of the gearbox housing, the lower end of the upper drive shaft extends into the conical sleeve housing, and the drive sleeve is located inside the conical sleeve housing;

[0020] A rivet housing is detachably installed at the bottom of a tapered sleeve housing. The lower end of the transmission sleeve extends into the rivet housing. The middle transmission shaft and the lower transmission shaft are located inside the rivet housing. The lower end of the second return spring is limited to the bottom wall of the housing assembly.

[0021] A rivet nozzle housing, wherein the rivet nozzle housing is detachably installed at the bottom of a rivet shell, and the rivet rod is located inside the rivet nozzle housing with its lower end extending out of the rivet nozzle housing.

[0022] Preferably, the upper end of the upper drive shaft is rotatably mounted in a bearing housing via an upper bearing assembly, the upper bearing assembly comprising:

[0023] The first upper bearing is installed in the drive shaft bearing groove at the top of the upper drive shaft.

[0024] The second upper bearing is provided on the side wall of the upper end of the upper drive shaft, and the second upper bearing is located above the limiting flange.

[0025] The third upper bearing is located below the limiting flange.

[0026] Preferably, the outer wall of the upper drive shaft is integrally formed with a first meshing gear ring with tooth grooves extending longitudinally, a gear sleeve is sleeved on the outside of the first meshing gear ring, a second meshing gear ring is provided on the inner wall of the gear sleeve to mesh with the first meshing gear ring, a flange ring is provided on the outside of the gear sleeve, and the flange ring is fixed to the driven gear by bolts.

[0027] Preferably, the upper and lower ends of the outer wall of the gear sleeve are provided with bearing mounting grooves, and a gear bearing is installed in each bearing mounting groove.

[0028] Preferably, a boss is provided on the upper outer wall of the transmission shaft, and a mounting plate is provided on the lower inner wall of the transmission sleeve. The boss is mounted on the mounting plate, and the movable gap is formed between the boss and the mounting plate.

[0029] Preferably, the top of the middle drive shaft is provided with an insert block, and the bottom of the upper drive shaft is provided with a slot. The insert block extends into the slot and can move within the slot. The distance of movement is the movable clearance.

[0030] Preferably, a spring mounting groove is provided at the bottom of the lower drive shaft, and a first return spring is installed between the spring mounting groove and the top of the anti-rotation pin.

[0031] Preferably, longitudinal waist holes are provided on opposite sides of the spring mounting groove, and a transverse limiting rod is provided through the anti-rotation pin, with both ends of the limiting rod inserted into the two longitudinal waist holes respectively.

[0032] Preferably, the bottom of the anti-rotation pin is provided with a polygonal transmission column, and the top of the rivet rod is provided with a polygonal connecting groove. The polygonal connecting groove allows the polygonal transmission column to be inserted, and the polygonal transmission column can move up and down within the polygonal connecting groove.

[0033] Preferably, the upper half of the rivet rod has a larger diameter than the lower half, and the upper half and the lower half are guided by a connecting platform. The bottom outlet of the rivet nozzle shell is provided with a limiting platform that matches the connecting platform, and the rivet rod can rotate and move up and down within the rivet nozzle shell.

[0034] Preferably, a spring sleeve is provided on the outside of the rivet rod, the spring sleeve can move up and down along the outer wall of the rivet rod, the top surface of the spring sleeve abuts against the bottom surface of the lower drive shaft, and the upper end of the second return spring is limited below the spring sleeve.

[0035] Preferably, the movable gap is 2~3mm.

[0036] The beneficial effects of the electric riveting gun of this invention are as follows: This application uses an electric cylinder instead of a hydraulic cylinder, eliminating the need for hydraulic pipes and preventing oil leakage; through the transmission cooperation of the bearing housing, upper drive shaft, transmission sleeve, middle drive shaft, lower drive shaft, and anti-rotation pin, it is compact in size and has stable transmission; the proximity switch can detect whether riveting is complete and provide feedback signals to the riveting system for monitoring; the ring pressure sensor can monitor whether the required pulling force during riveting is within a reasonable range, ensuring the quality of riveting. Attached Figure Description

[0037] Figure 1 This is a perspective view of this embodiment;

[0038] Figure 2 This is a perspective view of the gearbox housing after partial removal in this embodiment;

[0039] Figure 3 This is a cross-sectional view of this embodiment;

[0040] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0041] Figure 5 for Figure 4 A three-dimensional image;

[0042] Figure 6 This is a cross-sectional view showing the partial removal of the casing in this embodiment;

[0043] Figure 7 This is a perspective view of the meshing of the driving gear and the driven gear in this embodiment;

[0044] Figure 8 This is an exploded view of the upper and lower drive shafts in this embodiment;

[0045] Figure 9 This is a perspective view of the gear sleeve in this embodiment;

[0046] Figure 10 This is a perspective view of the connection between the drive shaft, the lower drive shaft, and the rivet rod in this embodiment;

[0047] Figure 11 This is an exploded view of the drive shaft, lower drive shaft, anti-rotation pin, and rivet rod in this embodiment;

[0048] Figure 12This is a perspective view of the engagement of the stop pin and the rivet rod in this embodiment;

[0049] Figure 13 This is an exploded view of the stop pin and rivet rod in this embodiment.

[0050] In the attached image:

[0051] 10. Housing assembly; 11. Tubular housing; 12. Gearbox housing; 13. Conical sleeve housing; 14. Rivet housing; 15. Rivet nozzle housing; 15a. Limiting platform;

[0052] 20. Electric cylinder; 21. Telescopic shaft; 22. Annular pressure sensor;

[0053] 30. Bearing housing sleeve;

[0054] 40. Upper drive shaft; 40a. Drive shaft bearing groove; 40b. Limiting flange; 41. Upper bearing assembly; 41a. First upper bearing; 41b. Second upper bearing; 41c. Third upper bearing; 42. Slot; 43. Proximity switch; 44. Through hole; 45. First meshing gear ring; 46. Gear sleeve; 46a. Second meshing gear ring; 46b. Flange ring; 46c. Bearing mounting groove; 47. Gear bearing;

[0055] 50. Transmission sleeve; 51. Mounting platform; 52. Movement clearance;

[0056] 60. Central drive shaft; 61. Boss; 62. Insert block; 63. Trigger body;

[0057] 70. Lower drive shaft; 71. Spring mounting slot; 72. Longitudinal slot;

[0058] 80. Anti-rotation pin; 81. Limiting rod; 82. First return spring; 83. Polygonal transmission column;

[0059] 90. Rivet rod; 91. Polygonal connecting groove; 92. Connecting platform;

[0060] 100. Motor; 101. Driven gear; 102. Driven gear; 103. Bolt;

[0061] 110. Second return spring; 111. Spring sleeve. Detailed Implementation

[0062] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0063] See Figures 1 to 13 As shown, this embodiment discloses an electric rivet gun, comprising:

[0064] 10 housing units are assembled.

[0065] Electric cylinder 20 is installed on the upper end of housing assembly 10. An annular pressure sensor 22 is provided on the telescopic shaft 21 of electric cylinder 20. The annular pressure sensor 22 can be a JHHM-4 weighing hollow perforated force sensor.

[0066] The bearing housing 30 is located inside the housing assembly 10, and its upper end is connected and fixed to the end of the telescopic shaft 21 of the electric cylinder 20. The bearing housing 30 can move up and down back and forth.

[0067] The upper drive shaft 40 has its lower half rotatably mounted inside the bearing housing 30. The upper end of the upper drive shaft 40 is not connected to any component to ensure that the upper drive shaft 40 is disconnected from the telescopic shaft 21. When the upper drive shaft 40 rotates, the telescopic shaft 21 will not rotate with it. The lower end of the upper drive shaft 40 extends out of the bearing housing 30. A driven gear 102 is fixed on the upper drive shaft 40 extending out of the bearing housing 30. A proximity switch 43 is provided on the top of the upper drive shaft 40. A through hole 44 is provided through the upper drive shaft 40 located below the proximity switch 43.

[0068] Motor 100 is fixedly mounted on housing assembly 10. A drive gear 101 is provided on the output shaft of motor 100, and the drive gear 101 meshes with the driven gear 102.

[0069] Transmission sleeve 50, the upper end of which is threadedly connected to the lower end of the upper transmission shaft 40;

[0070] The middle drive shaft 60 has its upper end hanging on the lower end of the inner wall of the transmission sleeve 50, with a 2-3mm movement gap 52 between them. The top of the middle drive shaft 60 is inserted into the bottom of the upper drive shaft 40, and the middle drive shaft 60 can move within the movement gap 52. The top of the middle drive shaft 60 is provided with a trigger body 63, which passes through the through hole 44 of the upper drive shaft 40 and can move toward the proximity switch 43 until the proximity switch 43 senses the trigger body 63.

[0071] The lower drive shaft 70 is threaded to the lower end of the middle drive shaft 60.

[0072] Anti-rotation pin 80, the top of anti-rotation pin 80 is elastically connected to the lower drive shaft 70;

[0073] The rivet rod 90 has a top for inserting the bottom of the anti-rotation pin 80. The anti-rotation pin 80 and the rivet rod 90 can move up and down relative to each other in the axial direction. The rivet rod 90 and the anti-rotation pin 80 can rotate synchronously. The outer wall of the upper end of the rivet rod 90 is threadedly connected to the inner wall of the lower end of the lower drive shaft 70. The lower end of the rivet rod 90 extends out of the bottom of the housing assembly 10.

[0074] The second return spring 110 is sleeved on the rivet rod 90, with its upper end abutting against the bottom of the lower drive shaft 70 and its lower end limited to the inner wall of the housing assembly 10.

[0075] like Figure 1 , Figure 3 As shown, the housing assembly 10 in this embodiment includes:

[0076] The tubular housing 11 and the bearing housing 30 are located inside the tubular housing 11;

[0077] Gearbox housing 12 is detachably mounted on the lower end of tubular housing 11. The lower end of upper drive shaft 40 passes through gearbox housing 12. Driven gear 102 is located inside gearbox housing 12. Motor 100 is mounted on one side of gearbox housing 12.

[0078] A tapered sleeve housing 13 is installed at the bottom of the gearbox housing 12. The lower end of the upper drive shaft 40 extends into the tapered sleeve housing 13, and the drive sleeve 50 is located inside the tapered sleeve housing 13.

[0079] The rivet housing 14 is detachably installed at the bottom of the tapered sleeve housing 13. The lower end of the transmission sleeve 50 extends into the rivet housing 14. The middle transmission shaft 60 and the lower transmission shaft 70 are located inside the rivet housing 14. The lower end of the second return spring 110 is limited to the bottom wall of the housing assembly 10.

[0080] The rivet nozzle housing 15 is detachably installed at the bottom of the rivet housing 14. The rivet rod 90 is located inside the rivet nozzle housing 15, and its lower end extends out of the rivet nozzle housing 15.

[0081] like Figure 7 , Figure 8 As shown, the upper end of the upper drive shaft 40 is rotatably mounted within the bearing housing 30 via an upper bearing assembly 41. The upper bearing assembly 41 includes:

[0082] The first upper bearing 41a is installed in the drive shaft bearing groove 40a at the top of the upper drive shaft 40.

[0083] The second upper bearing 41b has a limiting flange 40b on the side wall of the upper end of the upper drive shaft 40, and the second upper bearing 41b is located above the limiting flange 40b.

[0084] The third upper bearing 41c is located below the limiting flange 40b.

[0085] like Figure 8As shown, the outer wall of the upper drive shaft 40 is integrally formed with a first meshing gear ring 45 whose tooth grooves extend longitudinally. A gear sleeve 46 is fitted around the outside of the first meshing gear ring 45. The inner wall of the gear sleeve 46 is provided with a second meshing gear ring 46a that meshes with the first meshing gear ring 45. A flange ring 46b is provided around the outside of the gear sleeve 46. The flange ring 46b is locked and fixed to the driven gear 102 by bolts 103. The driven gear 102 is movably connected to the upper drive shaft 40 through the gear sleeve 46. The engagement of the first meshing gear ring 45 and the second meshing gear ring 46a, with the tooth grooves of the first meshing gear ring 45 extending longitudinally, ensures that the upper drive shaft 40 can move up and down within the gear sleeve 46 while also being driven to rotate by the second meshing gear ring 46a driven by the gear sleeve 46.

[0086] like Figure 8 , Figure 9 As shown, the upper and lower ends of the outer wall of the gear sleeve 46 are provided with bearing mounting grooves 46c, and a gear bearing 47 is installed on each bearing mounting groove 46c.

[0087] like Figure 4 , Figure 10 , Figure 11 As shown, a boss 61 is provided on the upper outer wall of the transmission shaft 60, and a hanging platform 51 is provided on the lower inner wall of the transmission sleeve 50. The boss 61 is hung on the hanging platform 51.

[0088] like Figure 10 , Figure 11 As shown, a plug 62 is provided at the top of the central drive shaft 60, as... Figure 8 As shown, the bottom of the upper drive shaft 40 is provided with a slot 42. In this embodiment, the insert 62 and the slot 42 are in a straight line shape. Of course, other polygonal or irregular shapes can also be used, as long as the middle drive shaft 60 can drive the upper drive shaft 40 to rotate. The insert 62 extends into the slot 42 and can move within the slot 42. The distance of movement is the movable gap 52.

[0089] like Figure 6 As shown, a spring mounting groove 71 is provided at the bottom of the lower drive shaft 70, and a first return spring 82 is installed between the spring mounting groove 71 and the top of the anti-rotation pin 80.

[0090] like Figure 10 , Figure 11 As shown, longitudinal waist holes 72 are provided on opposite sides of the spring mounting groove 71, and a transverse limiting rod 81 is provided through the anti-rotation pin 80. The two ends of the limiting rod 81 are respectively inserted into the two longitudinal waist holes 72.

[0091] like Figure 11As shown, the bottom of the anti-rotation pin 80 is provided with a polygonal transmission column 83, and the top of the rivet rod 90 is provided with a polygonal connecting groove 91. The polygonal connecting groove 91 allows the polygonal transmission column 83 to be inserted, and the polygonal transmission column 83 can move up and down within the polygonal connecting groove 91.

[0092] like Figure 13 As shown, the upper half of the rivet rod 90 has a larger diameter than the lower half. The upper half and the lower half are guided by the connecting platform 92. The bottom outlet of the rivet nozzle housing 15 is provided with a limiting platform 15a that matches the connecting platform 92. The rivet rod 90 can rotate (circumferential rotation) and move up and down (axial movement) within the rivet nozzle housing 15.

[0093] A spring sleeve 111 is fitted on the outside of the rivet rod 90. The spring sleeve 111 can move up and down along the outer wall of the rivet rod 90. The top surface of the spring sleeve 111 abuts against the bottom surface of the lower drive shaft 70. The upper end of the second return spring 110 is limited below the spring sleeve 111.

[0094] The working principle of this embodiment is as follows:

[0095] Before riveting, in the initial state, the elastic force of the second return spring 110 in its natural state forces the spring sleeve 111 to move upward. Under the action of the spring sleeve 111, the transmission shaft 70 moves upward. Under the action of the lower transmission shaft 70, the middle transmission shaft 60 moves upward. The boss 61 of the middle transmission shaft 60 first pulls away from the mounting plate 51 at the lower end of the transmission sleeve 50 until the middle transmission shaft 60 can no longer move relative to the transmission sleeve 50, forming an activity gap of 2-3mm. The trigger body 63 at the top of the middle transmission shaft 60 also moves upward and approaches the proximity switch 43.

[0096] During riveting, after the rivet rod 90 of the electric rivet gun moves above the rivet nut to be riveted in coordination with the servo linear module, the rivet rod 90 is driven to rotate, and the rivet nut is driven to perform the riveting action. Then, the rivet nut at the bottom of the rivet rod 90 is pulled up, causing the rivet nut to deform and complete the riveting action.

[0097] The operating principle of the rivet rod 90 rotation is as follows: the motor 100 drives the drive gear 101 to rotate, and the driven gear 102 meshing with the drive gear 101 rotates accordingly. The gear sleeve 46 locked and fixed to the driven gear 102 also rotates accordingly. Through the meshing transmission of the first meshing gear ring 45 and the second meshing gear ring 46a, the upper drive shaft 40 is driven to rotate in the first direction. Due to the setting of the upper bearing assembly 41, the bearing seat sleeve 30 does not rotate with the upper drive shaft 40. The upper drive shaft 40 is driven by the first gear in this embodiment. The U-shaped insert 62 engages with the slot 42 to drive the transmission, forcing the middle drive shaft 60 to rotate in the first direction, which in turn drives the lower drive shaft 70, which is threaded to the bottom of the middle drive shaft 60, to rotate. Since the limiting rod 81 of the anti-rotation pin 80 passes through the longitudinal slot 72 of the spring mounting groove 71, the anti-rotation pin 80 is forced to rotate. The bottom of the anti-rotation pin 80 is transmitted to the polygonal connecting groove 91 at the top of the rivet rod 90 through the polygonal transmission column 83, causing the rivet rod 90 to also rotate in the first direction, thus performing the rivet nut mounting action.

[0098] The riveting principle of the rivet rod 90 is as follows: the telescopic shaft 21 of the electric cylinder 20 drives the bearing seat sleeve 30, which is fixedly connected to it, to move upward. Through the transmission of the upper bearing assembly 41, the upper transmission shaft 40 moves upward accordingly. However, the gear sleeve 46 is fixed on the driven gear 102 and does not move upward. The first meshing gear ring 45 of the upper transmission shaft 40 moves upward along the second meshing gear ring 46a. The upward movement of the upper transmission shaft 40 drives the transmission sleeve 50, which is threaded to its lower end, to move upward. The rivet rod 90, which should move upward with the transmission sleeve 50, is stopped by the bottom of the rivet rod 90. After the rivet nut is attached, the rivet rod 90, through the anti-rotation pin 80, drives the lower drive shaft 70 to overcome the second return spring 110 and the first return spring 82. The lower drive shaft 70 will not move upwards, ultimately preventing the middle drive shaft 60, which is threaded to the top of the lower drive shaft 70, from moving upwards. The boss 61 of the middle drive shaft 60 will no longer move upwards, while the mounting plate 51 of the transmission sleeve 50 will continuously move upwards. The clearance 52 between the boss 61 and the mounting plate 51 will continuously decrease until the boss 61 and the mounting plate 51 are tightly attached, meaning the clearance 52 is zero. The telescopic shaft 21 of the electric cylinder 20 continues to pull upwards, driving the middle drive shaft 60 upwards through the transmission sleeve 50. The middle drive shaft 60 then drives the lower drive shaft 70, which is threaded to it, upwards, subsequently driving the rivet rod 90, threaded to the lower end of the lower drive shaft 70, upwards. The rivet rod 90 moves upwards by 7mm, ultimately forcing the rivet nut to deform, completing the riveting operation.

[0099] After completing the riveting operation of a rivet nut, the servo linear module is reset in coordination.

[0100] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electrically powered rivet gun characterized by: The utility model relates to a kind of automatic reset type hydraulic pressure sensor, including: Shell assembly (10); Electric cylinder (20), the electric cylinder (20) is installed in the upper end of shell assembly (10), annular pressure sensor (22) is provided on the telescopic shaft (21) of the electric cylinder (20); Bearing bush (30), the bearing bush (30) is located in shell assembly (10), and its upper end is fixedly connected with the end of the telescopic shaft (21) of the electric cylinder (20), the bearing bush (30) can move up and down; Upper transmission shaft (40), the upper end of the upper transmission shaft (40) is rotatably arranged in the lower half section of bearing bush (30), the lower end of the upper transmission shaft (40) extends out of bearing bush (30), the upper transmission shaft (40) is fixed on the driving gear (102) extending out of the bearing bush (30), the top of the upper transmission shaft (40) is provided with proximity switch (43); Motor (100), the motor (100) is fixedly installed on shell assembly (10), the output shaft of the motor (100) is provided with driving gear (101), and the driving gear (101) is engaged with driven gear (102); Transmission sleeve (50), the upper end of the transmission sleeve (50) is threadedly connected with the lower end of the upper transmission shaft (40); Middle transmission shaft (60), the upper end of the middle transmission shaft (60) is hung in the lower end of the inner wall of transmission sleeve (50), and an activity gap (52) is left between the two, the top of the middle transmission shaft (60) is inserted in the bottom of the upper transmission shaft (40), the middle transmission shaft (60) can move in the activity gap (52), the top of the middle transmission shaft (60) is provided with trigger body (63), the trigger body (63) penetrates the upper transmission shaft (40) and can move towards proximity switch (43); Lower transmission shaft (70), the upper end of the lower transmission shaft (70) is threadedly connected with the lower end of the middle transmission shaft (60); Rotation-stopping pin (80), the top of the rotation-stopping pin (80) is elastically connected with the lower transmission shaft (70); Pull rivet rod (90), the top of the pull rivet rod (90) is inserted into the bottom of the rotation-stopping pin (80), the rotation-stopping pin (80) and the pull rivet rod (90) can move up and down relative in axial direction, the pull rivet rod (90) and the rotation-stopping pin (80) can rotate synchronously, the outer wall of the upper end of the pull rivet rod (90) is threadedly connected with the inner wall of the lower end of the lower transmission shaft (70), and the lower end of the pull rivet rod (90) extends out of the bottom of shell assembly (10); Second reset spring (110), the second reset spring (110) is sleeved on the pull rivet rod (90), and the upper end thereof abuts against the bottom of the lower transmission shaft (70), and the lower end thereof is limited on the inner wall of shell assembly (10).

2. The electric powered rivet gun of claim 1, wherein: The shell assembly (10) includes: Tubular shell (11), the bearing bush (30) is located in tubular shell (11); Gear box shell (12), the gear box shell (12) is detachably installed in the lower end of tubular shell (11), the lower end of the upper drive shaft (40) passes through the gear box shell (12), the driven gear (102) is located in the gear box shell (12), the motor (100) is installed in the side of gear box shell (12); Conical sleeve shell (13), the conical sleeve shell (13) is installed at the bottom of gear box shell (12), the lower end of the upper drive shaft (40) extends into the conical sleeve shell (13), the transmission sleeve (50) is located in the conical sleeve shell (13); Pull the riving nut shell (14), the pull riving nut shell (14) is detachably installed at the bottom of conical sleeve shell (13), the lower end of the transmission sleeve (50) extends into the pull riving nut shell (14), the middle transmission shaft (60), the lower transmission shaft (70) is located in the pull riving nut shell (14), the lower end of the second return spring (110) is limited on the bottom wall of shell assembly (10); Pull the riving nut shell (15), the pull riving nut shell (15) is detachably installed at the bottom of pull riving nut shell (14), the pull riving rod (90) is located in the pull riving nut shell (15), and the lower end thereof extends out of the pull riving nut shell (15).

3. The electric powered pull riv gun of claim 1, wherein: The upper end of the upper drive shaft (40) is rotatably arranged in the bearing seat sleeve (30) through the upper bearing set (41), and the upper bearing set (41) comprises: First upper bearing (41a), the top of the upper drive shaft (40) is provided with a circle of transmission shaft bearing groove (40a), and the first upper bearing (41a) is installed in the transmission shaft bearing groove (40a); Second upper bearing (41b), a circle of limiting flange (40b) is arranged on the side wall of the upper end of the upper drive shaft (40), and the second upper bearing (41b) is arranged above the limiting flange (40b); Third upper bearing (41c), the third upper bearing (41c) is arranged below the limiting flange (40b).

4. The electric powered rivet gun of claim 1, wherein: The outer wall of the upper drive shaft (40) is integrally formed with a first meshing gear ring (45) with a longitudinal extending gear slot, the first meshing gear ring (45) is sleeved with a gear sleeve (46) outside, the inner wall of the gear sleeve (46) is provided with a second meshing gear ring (46a) meshing with the first meshing gear ring (45), the outer part of the gear sleeve (46) is provided with a flange ring (46b), and the flange ring (46b) is fixed with the driven gear (102) through bolt locking.

5. The electric powered pull riv gun of claim 4, wherein: The upper end and the lower end of the outer wall of the gear sleeve (46) are provided with bearing mounting grooves (46c), and each bearing mounting groove (46c) is provided with a gear bearing (47).

6. The electric powered pull riv gun of claim 1, wherein: The upper end of the middle transmission shaft (60) is provided with a circle of boss (61), the inner wall of the lower end of the transmission sleeve (50) is provided with a circle of hanging platform (51), the boss (61) is hung on the hanging platform (51), and the movable gap (52) is formed between the boss (61) and the hanging platform (51).

7. The electric powered pull riv gun of claim 1, wherein: The top of the middle transmission shaft (60) is provided with an insertion block (62), the bottom of the upper transmission shaft (40) is provided with an insertion slot (42), the insertion block (62) extends into the insertion slot (42), and the insertion block (62) can move in the insertion slot (42) by a distance of the movable gap (52).

8. The electric powered pull riv gun of claim 1, wherein: The bottom of the lower transmission shaft (70) is provided with a spring mounting slot (71), and a first reset spring (82) is mounted between the spring mounting slot (71) and the top of the rotation-stopping pin (80).

9. The electric powered pull riv gun of claim 8, wherein: The opposite sides of the spring mounting slot (71) are provided with longitudinal waist holes (72), the rotation-stopping pin (80) is provided with a transverse limiting rod (81) penetrating therethrough, and the two ends of the limiting rod (81) are respectively inserted into the two longitudinal waist holes (72).

10. The electric powered pull riv gun of claim 1, wherein: The bottom of the rotation-stopping pin (80) is provided with a polygonal transmission column (83), the top of the pull-riveting rod (90) is provided with a polygonal connecting slot (91), the polygonal transmission column (83) can be inserted into the polygonal connecting slot (91), and the polygonal transmission column (83) can move up and down in the polygonal connecting slot (91).

11. The electric powered pull riv gun of claim 2, wherein: The upper half of the pull-riveting rod (90) has a larger diameter than the lower half, the upper half and the lower half are guided by a connecting table (92), the bottom outlet of the pull-riveting nozzle shell (15) is provided with a limiting table (15a) matched with the connecting table (92), and the pull-riveting rod (90) can rotate and move up and down in the pull-riveting nozzle shell (15).

12. The electric powered pull riv gun of claim 11, wherein: The pull-riveting rod (90) is externally provided with a spring sleeve (111), the spring sleeve (111) can move up and down along the outer wall of the pull-riveting rod (90), the top surface of the spring sleeve (111) abuts against the bottom surface of the lower transmission shaft (70), and the upper end of the second reset spring (110) is limited below the spring sleeve (111).

13. The electric powered pull riv gun of claim 1, wherein: The movable gap (52) is 2-3 mm.

Images