WO2016050121A1

WO2016050121A1 - Rivet nut electric tool

Info

Publication number: WO2016050121A1
Application number: PCT/CN2015/087260
Authority: WO
Inventors: 洪劲松
Original assignee: 洪劲松
Priority date: 2014-09-29
Filing date: 2015-08-17
Publication date: 2016-04-07
Also published as: CN104308790B; EP3202536A4; EP3202536A1; CN104308790A

Abstract

A rivet nut electric tool comprises an outer cover (37), a clutch control system, a gear transmission system, a stroke control system and a screw-rod nut assembly. The clutch control system, the gear transmission system, the stroke control system and the screw-rod nut assembly are arranged in the outer cover (37). The clutch control system is cooperated with the gear transmission system to be on and off and transmit. The stroke control system precisely controls the stroke. Signals can be provided and the nut is riveted by the moving of a screw-rod (7). The gear clutch assembly drives a hexagonal connecting rod (6) to finish rivet nut screwing-in and screwing-out. Three sensors (39) are connected with a circuit board (25) by control wires. The clutch control system is cooperated with the three sensors (39) to work. A trigger (34) is arranged on the outer cover (37). The rivet nut electric tool with the structures has the advantages of that the power is high and rivet nuts with different specifications can be riveted. The circuit board controls precisely the clutch control system, the gear transmission system and the stroke control system to make sure that the rivet nuts are reliably installed in place to be riveted. Further more, the stroke and the electric quantity are visible, and the operation is convenient.

Description

Manual Title: Rivet nut power tool

Technical field

[0001] The present invention belongs to the field of mechanical technology, and in particular to a rivet nut power tool.

Background technique

[0002] The rivet nut tool is a special installation tool for rivet nuts, including a pneumatic rivet nut gun and an electric rivet nut gun. The pneumatic rivet nut tool has the advantages of fast and tensile force, but its rotation is loaded and rotated. The rotating blades of the pneumatic motor with the rivet nut have a frequently used or slightly dusty working environment, and will suddenly become stuck and not work, there is a hidden danger of a large motor crash, and the air motor has a small torque due to the limitation of the volume. Although the riveting tension can be made larger, the volume is also increased. The electric rivet nut gun is screwed in and the rivet nut mechanism can be said to not crash, the torque is large, and the volume is small, so the application is very wide. However, the electric rivet nut gun has the following limitations, which brings great inconvenience to the operator. It uses a purely mechanical device to control the clutch in a limited manner, and it is necessary to adjust a plurality of threaded structural parts to ensure the riveting reliability. Basis.

[0003] With the increasing use of rivet nut tools, in order to improve the efficiency and quality of the rivet nut, a patent document filed in the United States has been retrieved, and its publication/publication number is US05605070A, and the rivet nut tool has been improved. , but there are still some defects, the main defects are as follows:

[0004] (1) Since the mechanical clutching stroke is not controllable, the clutching position can be reached at a fixed position, the air travel is large, the daytime and power consumption are wasted, and the production efficiency is low;

[0005] (2) Relying on the mechanical torsion spring to ensure the rotation force, the rivet nut is loaded and loosely tightened, and the rivet nut is abnormally twisted, and the torsion spring is frequently used, due to other related mechanisms. The piece will repeatedly rub and hit, and the torsion spring is easy to be hot, which causes the torsion spring to become unstable with the change of temperature, which causes the rivet nut to be damaged or not caught in the loading process;

[0006] (3) The normal operation is extremely cumbersome, and it is necessary to adjust a plurality of threaded structural members at the same time to ensure the screwing length and the riveting length. These threaded structural members need to ensure the adjustment stroke and the need to meet the strength of the riveting. Need more reliable riveting, the thread needs to be tightened (the screw thread is not tight, it is easy to loosen and change the stroke and the thread is broken), and the adjusted stroke is often changed after the screw is tightened, non-professionals, non It is difficult for skilled people to operate smoothly. In small batches, the use of rivet nuts tends to adjust the daytime to be longer than the use of the day. [0007] (4) The structure is complicated, the parts are numerous, and the fault is easy to occur;

[0008] (5) The motor power is small, and the outer diameter of the motor shaft is matched with the inner diameter of the motor tooth, the fastening force is small, and the sliding force is easy to slip and loose, which limits the pulling force, and cannot rive the larger specification rivet nut;

[0009] (6) The life is low, many parts are fragile parts, and are not easy to replace.

technical problem

[0010] In order to solve the above technical problem, the object of the present invention is to provide a rivet nut power tool, which has powerful power, can reliably rive different specifications of rivet nuts, and the circuit board accurately controls the clutch control system, the gear transmission system and the stroke control. The system ensures that the rivet nut is reliably placed in place, and the stroke and power are visible, the life is long, the replacement is convenient, the use is simple, and it is very practical.

Problem solution

Technical solution

[0011] The solution of the present invention is as follows: a rivet nut power tool, comprising: an outer cover, a drawbar, a pipette tip, an outer sleeve, a tie rod fixing lock nut, a screw lock nut, a hexagonal connecting rod, a gear transmission system , stroke control system, screw nut assembly and clutch control system;

[0012] The gear transmission system includes a motor, a motor gear and a gear assembly, the gear assembly includes a gear I, a gear II and a connecting shaft, and the gear shaft I and the gear II are disposed on the connecting shaft from left to right in sequence, and the right end of the connecting shaft The machine has hobbing; one end of the motor is connected to the circuit board fixed in the outer cover through a control line, and the other end of the motor is connected with a motor gear; the motor gear and the gear I are meshed, the motor adopts a novel brushless motor; the motor passes the battery or AC to DC power drive;

[0013] the stroke control system includes an adjustment block guide shaft, an adjustment block I, an adjustment block II and a stroke plate; the stroke plate and the adjustment block guide shaft are fixed in the adjustment box body, and the stroke plate is located below the adjustment block guide shaft, and is adjusted The box body is fixed in the gear box; the adjusting block II is provided with an adjusting block II and an adjusting block I from left to right; the adjusting block I is provided with an adjusting bolt I, and the adjusting block II is provided with an adjusting bolt II , the adjusting bolt I and the adjusting bolt II are fixed on the adjusting box through the positioning rear cover; three sensors are arranged from left to right on the stroke plate, and the middle sensor is connected with the adjusting block II;

[0014] the screw nut assembly includes a screw rod, a screw nut, a roller positioning block and a magnet, and the left end diameter of the screw rod a roller positioning block is fixed, a magnet is arranged on the roller positioning block; a screw nut is arranged on the threaded portion of the screw rod, and a meshing tooth is arranged on the screw nut to engage with the hobbing; the screw rod is sleeved on the hexagonal connecting rod, The screw nut is fixed on the gear box, and the screw rod drives the magnet on the roller positioning block to provide a signal, so that the circuit board intelligently controls the electromagnet; the electromagnet controls the clutch control system through the magnetic field magnetic force, and the mechanical mechanism of the stroke control system is moved. , to achieve the purpose of precise control of the stroke, compared with the traditional mechanical control system, has the advantages of simple structure, reliability, and no cumbersome;

[0015] The clutch control system includes a gear clutch assembly and an electromagnet control device for controlling connection of the gear clutch assembly to the gear transmission system;

[0016] The screw nut is sleeved with a screw lock nut; the pull rod is fixed by a pull rod fixing lock nut and a screw lock nut; the pull rod fixed lock nut is provided with an outer sleeve; the outer sleeve is connected to the right end There is a gun head, the drawbar can be replaced according to the specifications of the rivet nut, only need to first remove the outer sleeve, then remove the pull rod to fix the lock nut, take out the pull rod, replace it, simple and convenient, and can rive the different specifications of the rivet nut;

[0017] The three inductors are connected by a control line and a circuit board; the outer cover is provided with a trigger, and the sensor can sense the movement of the screw nut assembly, acquire signals, and perform intelligent control through the circuit board.

[0018] The electromagnet control device includes an elastic piece fixing buckle, a spring piece, an electromagnet and an electromagnet push rod, the elastic piece fixing buckle is disposed at a left end of the gear clutch assembly; and an electromagnet push rod is disposed on the electromagnet fixed in the outer cover The right end of the electromagnet push rod is opposite to the elastic piece fixing buckle; the elastic piece is fixed at one end on the positioning rear cover plate, and the other end is disposed on the elastic piece fixing buckle; the hexagonal connecting rod is fixed on the right mountain of the shaft of the gear clutch assembly;

[0019] The motor gear is a thickened motor shaft processed with a gear, which overcomes the interference fit between the outer diameter of the motor shaft and the inner diameter of the motor tooth, and can only produce a small fastening force, and the frequent use will be loose. defect.

[0020] The outer cover is provided with an emergency button, and the emergency button is connected through the control line and the circuit board. If a special emergency situation is encountered, the emergency button can be pressed, the motor controls the gear transmission system to reverse, and the rivet nut is rotated. Out, safe and reliable.

[0021] The outer cover is provided with a residual power display device, which is located at the rear end of the electromagnet, and the residual power display device includes a residual power display and a residual power display button, and the remaining power display button is fixed on the residual power display through the control line. It is connected to the circuit board; it can display the residual power of the power supply, which is visible and more user-friendly. [0022] The outer cover above the adjustment box is provided with a transparent cover, and the transparent cover is provided with a scale ruler, and the stroke adjustment condition can be seen, which is intuitive and transparent, stable and reliable, and can be easily controlled by non-professional operators, achieving good performance. Riveting effect.

Advantageous effects of the invention

Beneficial effect

[0023] The rivet nut power tool has the following advantages and benefits:

[0024] (1) Using a new brushless motor, the power is strong, the motor gear is strong and reliable, and overcomes the interference fit between the outer diameter of the motor shaft and the inner diameter of the motor tooth, which can only produce a small fastening force and is frequently used. The loose defect can reliably rive the large-size rivet nut, which makes up for the defects that the current electric rivet nut tool cannot rive the larger specification rivet nut;

[0025] (2) using mechanical motion to send signals combined with the chip control electromagnet in the circuit board to generate magnetic field magnetic force, control gear clutch, so that the nut loading system and the riveting system are associated with each other and independent, using magnetic field magnetic force control gear clutch in riveting The field is an innovation. This kind of mechanism has large torque and precise control, especially solving the problem that the rivet nut can not be reliably guaranteed to be put in place.

[0026] (3) The length of the rivet nut and the length of the rivet only need to adjust the electronic components in the circuit board to achieve the effect, and the adjustment stroke can be seen through the transparent cover, which is intuitive and transparent, stable and reliable, and has a stroke scale. Non-professionals can operate the tool smoothly;

[0027] (4) The riveted outer sleeve is simple and convenient, only two parts, beautiful and generous;

[0028] (5) There is an emergency button. In case of insufficient power, rivet nut damage and riveting overload, press the emergency button.

, the motor reverses the rivet nut, which is very practical;

[0029] (6) can display the remaining battery power, the use is more user-friendly;

[0030] (7) The length is short, the volume is small, and even if there is a riveted dead angle, the riveting can be smoothly performed;

[0031] This is a smart tool that is easy to carry, can work in the field, is fast, and is user-friendly. It greatly liberates the labor force and improves work efficiency.

Brief description of the drawing

DRAWINGS

1 is a schematic view showing the internal structure of a rivet nut power tool according to Embodiment 1 of the present invention;

[0033] FIG. 2 is a schematic structural view of the top view of the top view of the tool according to the top view of the tool rotated 90 degrees; 3 is a partial structural schematic view of a right side view of the tool of the present invention;

4 is a schematic cross-sectional view of the top of the tool of the present invention;

5 is a partial structural schematic view of Embodiment 1 of the present invention;

6 is a schematic view showing the internal structure of a rivet nut power tool according to Embodiment 2 of the present invention;

7 is a partial structural schematic view of Embodiment 2 of the present invention;

8 is a schematic view showing the internal structure of a rivet nut power tool according to Embodiment 3 of the present invention;

9 is a partial structural schematic view of Embodiment 3 of the present invention;

[0041] wherein: 1, the drawbar; 2, the gun head; 3, the outer sleeve; 4, the tie rod fixed lock nut; 5, screw lock nut; 6, hexagonal connecting rod; 7, screw; 8, wire Rod and nut; 9, motor; 10, connecting shaft; 11, gear clutch assembly; 12, shrapnel; 13, motor gear; 14, gear I; 15, magnet; 16, stroke plate; 17, adjustment block I; Block II; 19, adjusting bolt I; 20, adjusting bolt II; 21, transparent cover; 22, hex wrench; 23, electromagnet; 24, electromagnet push rod; 25, circuit board; 26, roller positioning block; Shrapnel fixing buckle; 28, residual power display; 29, residual power display button; 30, emergency button; 31, gear II; 32, gear box; 33, positioning rear cover; 34, trigger; 35, adjustment block guide shaft 36, hobbing; 37, cover; 38, adjustment box; 39, sensor; 40, spring collar; 41, return spring I; 42, return spring II; 43, hole slot.

Embodiments of the invention

[0042] The present invention will be further described below in conjunction with the accompanying drawings;

Embodiment 1

[0044] As shown in FIG. 1, FIG. 4 and FIG. 5, the rivet nut power tool comprises an outer cover 37, a drawbar 1, a gun head 2, an outer sleeve 3, a pull rod fixed lock nut 4, and a screw lock. Nut 5, hexagonal connecting rod 6, gear transmission system, stroke control system, screw nut assembly and clutch control system;

[0045] The gear transmission system includes a motor 9, a motor gear 13, and a gear assembly, the gear assembly includes a gear 114, a gear 1131, and a connecting shaft 10, and the connecting shaft 10 is sequentially provided with a gear 114 and a gear 113 from left to right. 1. The right end of the connecting shaft 10 is machined with hobbing teeth 36, and may be replaced with a gear provided at the right end of the connecting shaft 10. One end of the motor 9 is connected to the circuit board 25 fixed in the outer cover 37 through a control line, and the other end of the motor 9 is connected. There is a motor gear 13; the motor gear 13 and the gear 114 are meshed, and the motor 9 is a new type of brushless motor; 9 driven by battery or AC to DC power supply;

[0046] The stroke control system includes an adjustment block guide shaft 35, an adjustment block 117, an adjustment block 1118, and a stroke plate 16; the stroke plate 16 and the adjustment block guide shaft 35 are fixed in the adjustment case 38, and the stroke plate 16 is located The adjusting block guide shaft 35 is fixed in the gear box 32; the adjusting block guiding shaft 35 is provided with an adjusting block 1118 and an adjusting block 117 from left to right, and the adjusting block guiding shaft 35 functions as a track; The adjusting block 117 is provided with an adjusting bolt 119, and the adjusting block 1118 is provided with an adjusting bolt 1120. The adjusting bolt 119 and the adjusting bolt 20 are fixed to the adjusting box 38 through the positioning rear cover 33; the adjusting block 117 and the adjusting block 1118 can be moved by the hex wrench 22 through the hole 43 provided in the outer cover 37 to rotate the adjusting bolt 119 and the adjusting bolt 1120, the hole 43 facilitates the passage of the hex wrench 22, and the stroke setting is performed; the electromagnet control device includes a spring fixing buckle 27, a spring piece 12, an electromagnet 23 and an electromagnet push rod 24, the elastic piece fixing buckle 27 is disposed at a left end of the gear clutch assembly; and is fixed in the outer cover 37 The electromagnet 23 is provided with an electromagnet push rod 24; the right end of the electromagnet push rod 24 is opposite to the elastic piece fixing buckle 27; the elastic piece 12-end is fixed on the positioning rear cover 33, and the other end is disposed on the elastic fixing buckle 27 The hexagonal connecting rod 6 is fixedly coupled to the right end of the shaft of the gear clutch assembly; the elastic force of the left elastic piece 12 is screwed into the rivet nut 吋 gear clutch assembly 11 to engage the gear clutch assembly and the gear 1131, and the rivet nut is screwed in After completion, the elastic piece 12 can automatically return the gear clutch assembly 11 under the elastic force; three sensors 39 are arranged on the stroke plate 16 from left to right, and the three sensors 39 correspond to three positions of 8, C, and D, respectively. The middle sensor 39 is connected with the adjusting block 1118, the starting position D is a fixed position, the 吋 can not be adjusted, the position can be adjusted after the 幵幵 maintenance, the maintenance end position is B, and the transfer position is C, where D and C Adjusting the stroke area for the thread rotation, the stroke distance between D and C can be adjusted according to the specifications of the rivet nut;

[0047] The screw nut assembly includes a screw rod 7, a screw nut 8, a roller positioning block 26 and a magnet 15, a left side end of the screw rod 7 is fixed with a roller positioning block 26, and a roller is disposed on the roller positioning block 26. 15; the threaded portion of the screw rod 7 is provided with a screw nut 8, the threaded rod nut 8 is provided with engaging teeth that can mesh with the hobbing teeth 36; the screw rod 7 is sleeved on the hexagonal connecting rod 6, and the screw nut 8 is fixed to the gear On the box 32, the screw rod 7 drives the magnet 15 on the roller positioning block 26 to move to provide a signal, so that the circuit board 25 intelligently controls the electromagnet 23; the electromagnet 23 controls the clutch control system by the magnetic field magnetic force, so that the mechanical mechanism of the stroke control system Movement, to achieve the purpose of precise control of the stroke, compared with the traditional mechanical control system, has the advantages of simple structure, reliability, and no cumbersome;

[0048] The right end of the screw rod 7 is sleeved with a screw lock nut 5; the pull rod 1 fixes the lock nut 4 and the screw rod through the pull rod The lock nut 5 is connected; the pull rod fixing lock nut 4 is provided with an outer sleeve 3; the outer sleeve 3 is connected with the gun head 2 at the right end, and the pull rod 1 can be replaced according to the specification of the rivet nut, only the outer sleeve 3 needs to be removed first. , after removing the tie rod to fix the lock nut 4, take out the pull rod 1, and replace it, which is simple and convenient, and can rive the rivet nuts of different specifications;

[0049] The three inductors 39 are connected to the circuit board 25 through a control line; the outer cover 37 is provided with a trigger 34; the inductor 39 can sense the movement of the screw nut assembly, acquire signals, and intelligently control through the circuit board 25. .

[0050] Further, the motor gear 13 is a thickened motor shaft processed with a gear, which overcomes the interference fit between the outer diameter of the motor shaft and the inner diameter of the motor tooth, and can only generate a small fastening force, frequently Use loose defects.

[0051] Further, as shown in FIG. 1, the outer cover 37 is provided with an emergency button 30, and the emergency button 30 is connected to the circuit board 25 through a control line. If a special emergency situation is encountered, the emergency button 30 can be pressed. The motor 9 will control the gear transmission system to reverse and screw out the rivet nut, which is safe and reliable.

[0052] Further, as shown in FIG. 1 and FIG. 3, the outer cover 37 is provided with a residual power display device located at the rear end of the electromagnet 23, and the residual power display device includes a residual power display 28 and a residual power display button 29. The remaining power display button 29 is fixed on the residual power display 28, and is connected to the circuit board 25 through the control line; the power supply residual power can be displayed, which is visible and more user-friendly.

[0053] Further, as shown in FIG. 1 and FIG. 2, the outer cover 37 above the adjustment box 38 is provided with a transparent cover 21, and the transparent cover 21 is provided with a scale ruler, which can be seen when the stroke is set. Adjusting distance, intuitive and transparent, stable and reliable, non-professional operators can also easily control and achieve good riveting effect.

[0054] Specifically, the gear transmission system, the clutch control system, the hexagonal connecting rod 6, the screw nut assembly, the stroke control system and the tie rod 1 constitute an automatic screw-in and screw-out system of the rivet nut, the power supply is started, and the trigger 34 is pulled. When the circuit board 25 confirms that the gear clutch assembly 11 is meshed with the gear 1131 on the gear assembly, the motor 9 provides power to rotate the gear clutch assembly 11 on the motor gear 13 on the motor 9, driving the hexagonal connecting rod 6 to drive the rod 1 to rotate. The pull rod 1 is rotated and screwed into the rivet nut, and the rivet nut is screwed into the 吋, and the screw 7 of the screw nut assembly is axially moved to provide a signal, so that the circuit board 25 intelligently controls the electromagnet 23, and the magnetic field magnetic force is used to control and disengage the gear clutch. The assembly 11, the gear clutch assembly 11 is controlled by the mechanical mechanism in combination with the magnetic field, the circuit board 25 controls the reliable axial movement, and the D position sensing 吋, the motor 9 can rotate in the forward direction, when the magnet 15 fixed on the roller positioning block 26 moves to After adjusting the C position, it will sense, the motor stops rotating, reaching To the precise stop and stroke, and when an abnormal situation occurs, the emergency button 30 can be pressed, the motor 9 is reversed, and the rivet nut is automatically unscrewed.

[0055] The motor 9, the gear assembly, the gear clutch assembly 11, the electromagnet 23, the stroke control system, the pull rod 1 and the screw nut 8 assembly that generates the axial movement constitute a rivet nut system, and the pull rod 1 moves axially to pull The rivet nut, after the rivet nut is screwed in, the circuit board 25 confirms that the magnet 15 is inductively sensed by the inductor C on the stroke plate 16, and after the trigger is pulled again by the trigger 34, the electromagnet 23 is activated under the control of the circuit board 25. The gear clutch assembly 11 is separated from the gear 1131 on the gear assembly. At this point, the automatic screwing system of the rivet nut is completely stopped, the motor 9 starts to drive the gear assembly, and the meshing teeth on the hobbing 36 and the screw nut 8 remain engaged to drive the screw. The nut assembly rotates. Since the roller positioning block 26 of one end of the screw rod 7 is radially fixed, it can only move axially. When the magnet 15 senses that the inductor 39 on the stroke plate 16 is at the C position, the riveting starts, when the screw rod The magnet 15 on the 7 moves to the adjusted position B吋, the riveting is completed, the loose trigger 34, the electromagnet 23 is de-energized, and the electromagnet push rod 24 is moved back to the left, the clutch gear The piece 11 is moved to the left under the elastic force of the elastic piece 12, and the motor 9 is soft-started at a lower speed reverse rotation, so that the gear on the gear clutch assembly and the gear 1131 are reliably and rapidly meshed, and after the meshing is quickly engaged, the motor is confirmed to be reliably engaged after the circuit board is confirmed. The motor will instantaneously reverse and reverse, and the rivet nut will be quickly unscrewed. The magnet 15 on the roller positioning block 26 connected to the lead screw 7 is returned to the D position of the inductor 39 on the stroke plate 16 to stop intelligently again, which means that the riveting ends. .

Embodiment 2

[0057] As shown in FIGS. 6 and 7, the electromagnet control device includes a return spring 1142, an electromagnet 23, and an electromagnet push rod 24; the return spring 1142 is disposed on the gear 114 of the gear assembly and the positioning rear cover Between 33, an electromagnet 23 is disposed on the left side of the gear 114, and an electromagnet push rod 24 is disposed on the right side of the electromagnet 23; a gear 1131 of the gear assembly is disposed on the right side of the meshing gear of the gear clutch assembly 11; a hexagonal connecting rod 6 and a gear The right end of the shaft of the clutch assembly 11 is fixedly coupled. After the electromagnet 23 is energized, the electromagnet push rod 24 pushes the gear assembly to separate the gear teeth II and the meshing teeth of the gear clutch assembly 11, and the hobbing teeth 36 on the connecting shaft 10 mesh with the meshing teeth on the screw nut 8 to perform riveting; When the electromagnet 23 is powered off, the return spring 1142 resets the gear assembly after the electromagnetic field magnetic field disappears, the gear clutch assembly 11 and the gear 1131 engage, and the hobbing teeth 36 on the shaft 10 and the meshing teeth on the screw nut 8 are connected. The engagement of the rivet nut can be performed, and the rivet nut can be screwed in and out, and the elastic piece 12 and the elastic piece fixing buckle 27 in the first embodiment are eliminated. The other components and structures are the same as those in the first embodiment.

Embodiment 3 [0059] As shown in FIG. 8 and FIG. 9, the electromagnet control device includes a return spring 141, a spring collar 40, an electromagnet 23, and an electromagnet push rod 24; an electromagnet push rod 24 is disposed on the right side of the electromagnet 23 The shaft of the gear clutch assembly 11 is arranged in a hexagonal structure, and the right end of the shaft is processed with a connecting hole for connecting with the hexagonal connecting rod 6. The left end of the hexagonal connecting rod 6 is provided with a groove, and a spring collar 40 is fixed in the groove, and is reset. The spring 141 is sleeved on the hexagonal connecting rod 6, one end is connected to the spring collar 40, and the other end is fixed to the stepped hole in the screw shaft 7. The connecting portion of the front end of the shaft of the gear clutch assembly 11 is generally provided in a hexagonal structure for connecting with the connecting hole processed at the left end of the hexagonal connecting rod 6, the connecting hole is correspondingly arranged as a hexagonal hole, and the hexagonal connecting rod 6 is in the electromagnet The electromagnetic field of 23 can be connected to the front end connecting portion of the shaft of the gear clutch assembly 11, and the gear clutch assembly 11 and the gear 1131 are separated, the hobbing teeth 36 on the connecting shaft 10 and the meshing teeth on the screw nut 8 are engaged. After the electromagnet 23 is de-energized, the hexagonal connecting rod 6 is reset by the return spring 141 and the spring retaining ring 40, and the hobbing teeth 36 on the connecting shaft 10 and the meshing teeth on the screw nut 8 are kept engaged. The gear clutch assembly 11 and the gear 1131 are engaged, and the rivet nut can be screwed in and out. The elastic piece 12 and the elastic fixing buckle 27 in the first embodiment are eliminated, and other components and structures are the same as those in the first embodiment.

While the invention has been described and illustrated in the foregoing embodiments, the embodiments of the present invention The function is still beyond the scope of the invention, and should be within the protection scope of the present invention.

Claims

Claim

[Claim 1] A rivet nut power tool, comprising: an outer cover, a drawbar, a pipette tip, an outer sleeve, a tie rod fixed lock nut, a screw lock nut, a hexagonal connecting rod, a gear transmission system, and a stroke control system. , screw nut assembly and clutch control system;

The gear transmission system includes a motor, a motor gear and a gear assembly. The gear assembly includes a gear I, a gear II and a connecting shaft. The connecting shaft is provided with a gear I and a gear II from left to right in sequence, and the right end of the connecting shaft is rolled. One end of the motor is connected to a circuit board fixed in the outer cover through a control line, and the other end of the motor is connected with a motor gear; the motor gear and the gear I mesh;

The stroke control system includes an adjustment block guide shaft, an adjustment block I, an adjustment block II and a stroke plate; the stroke plate and the adjustment block guide shaft are fixed in the adjustment box body, and the stroke plate is located below the adjustment block guide shaft, and the adjustment box is fixed In the gearbox; the adjusting block guiding shaft is provided with an adjusting block II and an adjusting block I from left to right; the adjusting block I is provided with an adjusting bolt I, and the adjusting block II is provided with an adjusting bolt II, an adjusting bolt I and the adjusting bolt II are fixed on the adjusting box through the positioning rear cover; three sensors are arranged from left to right on the stroke plate, and the middle sensor is connected with the adjusting block II;

The screw nut assembly includes a screw rod, a screw nut, a roller positioning block and a magnet, a left side end of the screw rod is fixed with a roller positioning block, a magnet is arranged on the roller positioning block, and a screw nut is arranged on the threaded portion of the screw rod , the screw nut is provided with a meshing tooth that can mesh with the hobbing teeth

The screw rod is sleeved on the hexagonal connecting rod, and the screw nut is fixed on the gear box;

The clutch control system includes a gear clutch assembly and an electromagnet control device for controlling connection of the gear clutch assembly to the gear transmission system;

The screw nut is sleeved with a screw lock nut; the pull rod is connected by a pull rod fixing lock nut and a screw lock nut; the pull rod fixing lock nut is provided with an outer sleeve; the outer sleeve is connected with a gun head at the right end ;

The three inductors are connected to the circuit board through a control line; a trigger is arranged on the outer cover.

[Claim 2] The rivet nut power tool according to claim 1, wherein: the electromagnet control device comprises a spring clip fastening clip, a spring piece, an electromagnet and an electromagnet push rod, and the elastic piece is fixed The buckle is disposed at the left end of the gear clutch assembly; the electromagnet fixed in the outer cover is provided with an electromagnet push rod; the right end of the electromagnet push rod is opposite to the elastic piece fixing buckle; the elastic piece is fixed at one end on the positioning rear cover, and the other end is disposed On the elastic fixing buckle; the hexagonal connecting rod is fixed to the right end of the shaft of the gear clutch assembly.

[Claim 3] The rivet nut power tool according to claim 1 or 2, wherein the motor gear is a thickened motor shaft machined with a gear.

[Claim 4] The rivet nut power tool according to claim 3, wherein: the outer cover is provided with an emergency button, and the emergency button is connected to the circuit board through the control line.

[Claim 5] The rivet nut power tool according to claim 4, wherein: the outer cover is provided with a residual power display device at a rear end of the electromagnet, and the residual power display device includes a residual power display and a surplus power The display button, the residual power display button is fixed on the residual power display, and connected through the control line and the circuit board.

[Claim 6] The rivet nut power tool according to claim 5, wherein: the outer cover above the adjustment case is provided with a transparent cover, and the transparent cover is provided with a scale.