Combination tool

Abstract

The utility model discloses a combined tool which comprises a reduction gearbox and a transmission mechanism. The adjusting unit is used for adjusting the stroke of the transmission mechanism and / or adjusting the positive and negative rotation of the motor and / or adjusting the rotating speed of the motor; the function switching unit is used for switching a nut riveting mode, a rivet mode and a screwdriver and electric drill mode; and the circuit control unit is connected with and controls the adjusting unit, the function switching unit, the motor and the key switch. The utility model provides a combined tool which is compact in structure, simple, small and exquisite, and can be combined with a rivet nut assembly, a rivet assembly and a screwdriver bit assembly to form a multifunctional professional tool.

Description

Technical Field

[0001] The utility model relates to the field of mechanical tools, and particularly to a combined tool. Background Art

[0002] Power tools are the most common tools to liberate human labor at present, including electric drills, electric wrenches, electric rivet tools, electric rivet nut tools, etc.; many working conditions require operations such as drilling, riveting, riveting nut, and screwing, and multiple tools are needed to cooperate to complete these tasks. Since each tool has a single function, the core components are not designed with a structure to replace other functional components for specific functions, lacking the combination performance. Carrying multiple tools is inconvenient and costly, especially for outdoor and high-altitude operations, which is also not conducive to environmental protection and energy conservation.

[0003] Since the rivet gun only needs linear motion to perform riveting, without special design, it cannot be changed into a tool that needs to rotate to install rivet nuts and can also perform riveting through linear reciprocating motion. And the full-automatic rivet nut tool is a professional tool that needs to rotate to install rivet nuts and then perform riveting through linear reciprocating motion immediately. The switch settings are completely different from those of the rivet gun and the electric screwdriver; for the rivet nut tool, it is necessary to install the rivet nut and then pull the trigger (two actions) to complete the riveting. Rotating power is essential, and specific design changes (with drawbacks such as sacrificing performance, quick replacement, and no side effects) are required to be used as a rivet tool. Currently, the electric rivet nut tool usually only considers replacing the gun head and the pulling screw due to different rivet nut specifications, rather than the entire assembly being easily replaceable. Screwdriver types require rotational torque tools and need more complex designs to become riveting tools. Summary of the Utility Model

[0004] To solve the above problems, the utility model provides a combined tool, which has a compact structure, is simple and small, and can be combined with a rivet nut assembly, a rivet assembly, and a screwdriver drill bit assembly to form a multi-functional professional tool.

[0005] A combined tool includes a reduction gearbox and a transmission mechanism, and further includes: a clutch mechanism for connecting and disconnecting the reduction gearbox and the transmission mechanism; the output end of the reduction gearbox is connected to one end of the clutch mechanism, and the other end of the clutch mechanism is connected to the transmission mechanism.

[0006] Furthermore, it also includes a motor, a key switch, and an adjustment unit for adjusting the stroke of the transmission mechanism and / or the forward and reverse rotation of the motor and / or the motor speed;

[0007] A function switching unit for switching among three modes: the rivet nut mode, the rivet mode, and the screwdriver drill mode;

[0008] A circuit control unit is connected to the adjustment unit, the function switching unit, the motor, and the key switch for control.

[0009] Furthermore, the motor and the speed reducer are of a hollow shaft structure; the transmission mechanism, the speed reducer, and the motor are located on the same straight line.

[0010] Furthermore, the speed reducer includes a planet carrier I, a planet carrier II, a planetary gear set I, a planetary gear set II, a base, and a ring gear; the base is connected to the ring gear; one side of the planet carrier I is assembled with the planetary gear set I, and the other side meshes with the planetary gear set II; the planetary gear set II is assembled on one side of the planet carrier II, and the other side is connected to the clutch mechanism; the planetary gear set I and the planetary gear set II are also assembled and connected to the ring gear.

[0011] Furthermore, a sensitive element is provided on the planet carrier II and / or the transmission mechanism.

[0012] Furthermore, the clutch mechanism is a transmission sleeve, which is respectively connected to the planet carrier II and the transmission mechanism.

[0013] Furthermore, the transmission sleeve includes a transmission sleeve I, a transmission sleeve II, and a clutch sleeve; the clutch sleeve is arranged between the transmission sleeve I and the transmission sleeve II, and the connection and separation of the transmission sleeve I and the transmission sleeve II are realized through the movement of the clutch sleeve.

[0014] Furthermore, a shift lever spring is provided on the clutch sleeve, and a clutch button is connected to the top of the shift lever spring; the movement of the clutch sleeve is realized by the action of the clutch button on the shift lever spring.

[0015] Furthermore, a sensitive element is provided on the clutch button.

[0016] Furthermore, a rivet nut assembly, a rivet assembly, and a screwdriver bit assembly are respectively assembled outside the transmission mechanism to realize the switching of the rivet nut tool, the rivet tool, and the screwdriver bit tool.

[0017] The tool of the present utility model uses a motor to drive a lead screw transmission to perform a linear motion through a speed reducer, and at the same time can drive a transmission shaft to rotate. They are related to each other but can also be independent of each other. The output linear reciprocating motion of the lead screw transmission driven by the speed reducer is combined with a rivet structure to form a rivet tool; the output linear reciprocating motion of the lead screw transmission driven by the speed reducer is combined with the rotational torque output by the transmission shaft of the rivet nut assembly driven by the speed reducer to form a rivet nut tool; the speed reducer alone drives the transmission shaft to output rotational torque and is combined with a torque mechanism to form an electric screwdriver, and the output rotational torque characteristic is combined with a drill bit to form an electric drill. Several replacement components are independent of each other, the replacement is convenient, the combined operation is simple, and operations such as drilling, riveting rivets, riveting nuts, and installing screws can be completed with only one tool.

[0018] The design of this utility model contains common components. During use, the rivet nut assembly, rivet assembly, and screwdriver bit assembly are respectively assembled to achieve corresponding functions. One tool with multiple functions greatly expands the usage scenarios, providing portability and convenience for users, reducing the required space for use and placement, greatly saving various costs, and being highly user-friendly and intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Cross-sectional schematic diagram of Embodiment 1 of this utility model;

[0020] Figure 2 Schematic connection diagram of the clutch mechanism in Embodiment 1 of this utility model;

[0021] Figure 3 Top view of the connection between the shift lever spring and the clutch button in Embodiment 1 of this utility model;

[0022] Figure 4 Side view of the connection between the shift lever spring and the clutch button in Embodiment 1 of this utility model; Figure 1 ;

[0023] Figure 5 Side view of the connection between the shift lever spring and the clutch button in Embodiment 1 of this utility model; Figure 2 ;

[0024] Figure 6 Top view of the liquid crystal circuit board in Embodiment 1 of this utility model;

[0025] Figure 7 Cross-sectional schematic diagram of the rivet nut assembly in Embodiment 2 of this utility model;

[0026] Figure 8 Cross-sectional schematic diagram of the second rivet nut assembly in Embodiment 2 of this utility model;

[0027] Figure 9 Cross-sectional schematic diagram of the assembly of the first and second rivet nut assemblies in Embodiment 2 on Embodiment 1 of this utility model;

[0028] Figure 10 Cross-sectional schematic diagram of the first rivet assembly in Embodiment 3 of this utility model;

[0029] Figure 11 Cross-sectional schematic diagram of the second rivet assembly in Embodiment 3 of this utility model;

[0030] Figure 12 Cross-sectional schematic diagram of the assembly of the first and second rivet assemblies in Embodiment 3 on Embodiment 1 of this utility model;

[0031] Figure 13 Cross-sectional schematic diagram of the screwdriver bit assembly in Embodiment 4 of this utility model;

[0032] Figure 14 This is a cross-sectional schematic view of the assembly of the screw bit drill bit assembly in Embodiment 4 of the present utility model on Embodiment 1. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] A combined tool generally includes a transmission mechanism (a screw rod transmission mechanism), a reduction gearbox, a motor, a housing, a switch trigger, etc.

[0035] The improvement of the present utility model mainly lies in further including a clutch mechanism for connecting and disconnecting the reduction gearbox and the transmission mechanism. When the reduction gearbox and the transmission mechanism are connected, the transmission mechanism is driven to realize rivet riveting, rivet nut riveting, and rivet riveting; when the reduction gearbox and the transmission mechanism are disconnected, the transmission shaft in the screw bit drill bit assembly is driven to drive the screwdriver (electric drill or electric wrench) to rotate forward and backward. The clutch mechanism is specifically set as a transmission sleeve, which can be a single component or a combined component.

[0036] The present utility model further includes an adjustment unit for adjusting the screw rod stroke and / or the forward and backward rotation of the motor and / or the motor speed. The adjustment unit is adjusted by the "+" and "-" buttons provided on the circuit control unit. Various parameters and data to be adjusted are pre-written and entered into the chip of the circuit control unit. The adjustment unit further includes a screw rod stroke measurement unit for feeding back the number of rotations of the screw rod to the circuit control unit. The measurement unit includes, but is not limited to, one or a combination of a magnetic ring encoder, an optical encoder, a magnetoresistive sensor, a Hall sensor, a tensile sensor, etc. The present utility model mainly applies a magnet and a Hall sensor. The screw rod stroke measurement unit includes, but is not limited to, being able to be arranged on a connecting piece, a transmission shaft, a screw rod, a screw nut, etc.

[0037] The present utility model further includes a function switching unit for switching among three modes: a rivet nut mode, a rivet mode, and a screwdriver electric drill mode. In the rivet nut mode, the motor work is switched to the screw rod movement tensile force output combined with the rotating transmission shaft rotating torque output; in the rivet mode, the motor work is switched to the screw rod linear movement tensile force output; in the screwdriver electric drill mode, the motor work is switched to provide a rotating torque for rotation. The function switching unit is specifically realized by the function mode switching button on the circuit control unit. Similarly, the parameters and data in various modes are pre-written and entered into the chip of the circuit control unit.

[0038] The utility model further includes a circuit control unit, which is connected to the adjustment unit, the function switching unit, the motor and the key switch. It can be a circuit control board with a liquid crystal display screen, such as Figure 5 shown. An inductor corresponding to the adjustment unit (actually a lead screw stroke measurement unit) is arranged on the circuit control unit. The liquid crystal screen board displays the tool states, namely three modes: rivet, blind nut, screwdriver and electric drill; three buttons, namely "+", "-" buttons, are arranged on the circuit control unit to control the stroke (blind nut and rivet modes) and the forward and reverse rotation (screwdriver and electric drill modes), and the other button is a function mode switching button.

[0039] The motor and the reduction gearbox of the utility model have a hollow shaft structure; the transmission mechanism, the reduction gearbox and the motor are located on the same straight line. Sensitive elements are arranged on the planet carrier II and / or the transmission mechanism.

[0040] Embodiment 1

[0041] such as Figure 1-6 shown, a combined tool includes a lead screw transmission mechanism, a reduction gearbox, a motor 30 and a clutch mechanism.

[0042] The reduction gearbox includes a planet carrier I1, a planet carrier II2, a planetary gear set I3, a planetary gear set II4, a base 5 and a ring gear 6; the base 5 is connected to the ring gear 6; one side of the planet carrier I1 is assembled with the planetary gear set I3, and the other side is meshed with the planetary gear set II4; the planetary gear set II4 is assembled on one side of the planet carrier II2, and the other side is connected to the clutch mechanism; the planetary gear set I3 and the planetary gear set II4 are also meshed with the ring gear 6. A rotary damping sleeve 31 is further arranged in the inner hole of the planet carrier II2.

[0043] A plurality of magnets I7 (sensitive elements) are arranged on the planet carrier II2, corresponding to a Hall sensor I8, for detecting the number of rotation circles of the planet carrier II2. A Hall sensor IV28 is arranged at the tail end of the motor 30, and its output shaft is connected to the planetary gear set I3.

[0044] The clutch mechanism is a transmission sleeve, including a transmission sleeve I9, a transmission sleeve II10 and a clutch sleeve 11; the clutch sleeve 11 is arranged between the transmission sleeve I9 and the transmission sleeve II10, and the connection and separation of the transmission sleeve I9 and the transmission sleeve II10 are realized through the movement of the clutch sleeve 11. In this embodiment, external gear racks 901 can be arranged at the ends of the transmission sleeve I9 and the transmission sleeve II10 connected to the clutch sleeve 11, and internal gear racks are arranged in the inner hole of the clutch sleeve 11, so that the clutch sleeve 11 is meshed with the transmission sleeve I9 and the transmission sleeve II10. When the clutch sleeve 11 is meshed with both the transmission sleeve I9 and the transmission sleeve II10 at the same time, when the transmission sleeve II10 rotates, it drives the clutch sleeve 11 to rotate, and then drives the transmission sleeve I9 to rotate, so as to drive the nut 17 to rotate for use; when the clutch sleeve 11 is only meshed with the transmission sleeve I9, the rotation of the transmission sleeve II19 does not drive the transmission sleeve I9.

[0045] A shift lever spring 12 is provided on the clutch sleeve 11, and the top end of the shift lever spring 12 is connected to the clutch button 13; by the action of the clutch button 13 on the shift lever spring 12, the movement of the clutch sleeve 11 is realized. A magnet II 14 is provided on the clutch button, corresponding to the Hall sensor II 15, and signals are conducted through the current and fed back to the circuit control unit. As Figure 2 、 3 shown, it is a schematic diagram of the position of the shift lever spring 12 in the unclutched state; as Figure 4 described, it is a schematic diagram of the position of the shift lever spring 12 in the clutched state.

[0046] The lead screw transmission mechanism includes a lead screw 16, a nut 17, a bearing seat, a positioning sleeve 18 and a bearing 19; the bearing seat includes a front bearing seat 20 and a rear bearing seat 21, which are fixedly connected between them. The lead screw 16 and the nut 17 are cooperatively connected and arranged in the bearing seat. A through hole is provided in the middle of the lead screw 16 of the lead screw, and the positioning sleeve 18 is fixed at the front end. Bearings 19 are provided between the nut 17 and the front bearing seat 20 and the rear bearing seat 21. A long groove is also provided on the rear bearing seat 21, so that the magnet III 22 (sensitive element) provided on the positioning sleeve 18 extends out of the rear bearing seat 21 and can move axially along the long groove. The magnet III 22 here corresponds to the Hall sensor III 23 on the initial circuit board, and signals are conducted through the current and fed back to the circuit control unit.

[0047] The Hall sensors in this embodiment are all connected to the circuit control unit. The circuit control unit is a liquid crystal circuit board 24, and a function switching button 25 and an adjustment button 26 are provided on the circuit control unit.

[0048] Embodiment 2

[0049] As Figure 7 、 8 、9 shown, when the utility model becomes a rivet nut tool, it is necessary to assemble the rivet nut assembly 27. In the original state of the utility model, it is in the rivet nut mode.

[0050] The rivet nut assembly 27 includes a rivet nut assembly one and a rivet nut assembly two; the rivet nut assembly one includes a connecting shaft 2701, a connecting stud 2702, a rotating connecting shaft 2703, a clutch fixing sleeve 2704 and a pulling screw 2705; the connecting stud 2702 is arranged in the outer sleeve, one end is connected to the positioning block 18, and the other end is connected to the rotating connecting shaft 2703; an internal thread is provided at the other end of the rotating connecting shaft 2703, which is cooperatively connected with the pulling screw 2705; a clutch fixing sleeve 2704 is arranged outside the pulling screw 2705 and the rotating connecting shaft 2703, and a spring is provided between the clutch fixing sleeve 2704 and the connecting stud 2702.

[0051] The rivet nut assembly II includes an outer sleeve 2706, an adjusting nut 2707, and a gun head 2708, which is conventional technology. During assembly, the connecting shaft 2701 is inserted into the lead screw hole and passes through to the planet carrier I1 and is fixed to the planet carrier I1. Specifically, the special-shaped port (hexagonal shape) on the connecting shaft 2701 can be designed to engage with the special-shaped port (hexagonal hole) of the planet carrier 1, but it is not limited to the engagement of the hexagonal shaft and the hexagonal hole in this embodiment. The connecting stud is installed on the positioning block, and then the rivet nut assembly II is installed. The outer sleeve is tightened. After the two assemblies are installed, a rivet nut tool is formed.

[0052] As Figure 8 shown, the connecting shaft is connected to the planet carrier I1. The trigger switch is toggled, and at the same time, the connecting shaft is rotated to drive the pulling screw to rotate for installing and loosening the rivet nut. After the rivet nut is installed, the trigger switch is toggled again. The planet carrier I1 drives the planet carrier II2 to decelerate at a fixed reduction ratio through the planetary gear set II4. The magnet provided on the planet carrier II2 senses with the Hall sensor during rotation to calculate the number of rotation turns and the stroke. A magnetic inductor 2709 is provided at the rear end of the transmission shaft and senses with the Hall sensor IV28 provided at the rear end of the motor.

[0053] In the original state of the present utility model, it is in the rivet nut mode. During operation, the trigger switch is toggled, and the motor drives the planet carrier I1 to drive the pulling screw to rotate for installing the nut. When the nut rotates to a fixed number of turns and is in place, the motor stops working. Then the tool trigger switch is pulled again, and the riveting starts. At this time, a large riveting pressure is generated on the lead screw nut, causing the connecting shaft with limited torque to start slipping in the damping sleeve provided in the planet carrier I1. The lead screw drives the rivet nut on the pulling screw to continuously move backward until the riveting is completed. The trigger switch is released, the lead screw moves forward to reset, and the rivet nut that has completed the riveting is loosened in reverse, and the riveting work ends.

[0054] In this embodiment, the required stroke can be adjusted according to the riveting effect through the "+" and "-" buttons on the circuit control board. The number of installation turns and the stroke can also be set. The chip of the liquid crystal display line control board sets the default mode as the rivet nut mode. When the trigger of the tool is pulled for the first time, the moving distance of the tool lead screw is very small, and the riveting can only be achieved by toggling the switch trigger again.

[0055] Embodiment 3

[0056] As Figure 10 、 11 、12 shown, when the present utility model becomes a rivet tool, the rivet assembly 29 needs to be assembled. The rivet assembly includes a rivet assembly I and a rivet assembly II.

[0057] The first rivet assembly includes a clamping sleeve 2901, a plug 2902, a plug spring 2903, and a three-jaw 2904; the threaded end of the clamping sleeve 2901 is connected to the positioning block 18 on the lead screw, and the three-jaw 2901 is arranged inside the clamping sleeve 2901; the plug axially moves in the inner holes of the planet carrier I1 and the planet carrier II2, but cannot be driven to rotate. The second rivet assembly includes an outer sleeve 2905 and a nozzle 2906.

[0058] During assembly, pass the plug 2902 through the inner hole of the lead screw 16, then through the inner holes of the planet carrier I1 and the planet carrier II2, and then insert it into the inner hole of the hollow shaft of the motor 30. Screw the external thread of the clamping sleeve 2901 onto the internal thread of the positioning block 18 provided outside the lead screw. Then install the second rivet assembly and screw the external thread of the outer sleeve 2905 onto the front bearing seat, thus forming a rivet tool.

[0059] The plug tube has a smooth outer circle and extends into the inner hole of the motor shaft. Since its length is short, it cannot sense the Hall sensor at the tail end and cannot be set to the rivet nut mode. The clutch switch is in the non-screwdriver mode, and the rivet mode is the only mode that can be set. The waste rivet rod after riveting passes through the inner hole of the plug, then through the hollow shaft of the motor, and flows into the waste rivet rod collection cylinder of the tool.

[0060] When starting the rivet mode, press the function button. After the liquid crystal display shows the rivet function, riveting can begin. At this time, the adjustment unit can adjust the riveting stroke according to different rivet requirements. After that, it is a conventional riveting process and will not be further described.

[0061] Embodiment 4

[0062] As Figure 13 、 14 shown, when the present utility model becomes a screwdriver and a drill tool, it is necessary to assemble the screwdriver bit assembly 31.

[0063] The screwdriver bit assembly includes an outer fixing nut 3101, a transmission connecting shaft 3102, and a bit or drill bit 3103; during assembly, first move the clutch button to the screwdriver mode (the liquid crystal display circuit board can no longer be set to the rivet mode or the rivet nut mode), insert the special-shaped port at the tail of the transmission connecting shaft 3102 on the assembly into the inner hole of the transmission sleeve II10 and fix it, and screw the fixing nut 3101 onto the front bearing seat, thus forming a screwdriver tool or a drill tool. (The special-shaped port here can be designed as a hexagon as in Embodiment 2, and the inner hole of the transmission sleeve II10 is also designed as a hexagon hole to achieve the meshing effect, but it is not limited to the hexagon shaft and hexagon hole meshing in this embodiment). If the screwdriver assembly is installed by mistake without moving the clutch button, the actual mode is in the rivet mode or the rivet nut mode at this time. Since the screwdriver assembly has no associated transmission with the lead screw assembly, the lead screw will alarm and remind to switch the mode or install a rivet (rivet nut) after reciprocating three times without load.

[0064] After turning on the screwdriver and drill modes, the lead screw nut is in a static state without torque output, and the tool power will output all the torque to the transmission connecting shaft 3102 to achieve tightening or loosening of screws or drilling. The "+" and "-" buttons are used to switch the forward and reverse rotation of the motor. At this time, the function switching unit can adjust the forward and reverse speeds according to different requirements (after the button switch shows the correct rotation direction, continue to switch the speed function to switch to the required speed).

[0065] The default setting mode of this utility model tool is the blind rivet nut mode. After the tool body is installed with the blind rivet nut assembly, pull the trigger to activate the tool, which will remind the user to set the function mode. After confirming the blind rivet nut function, it will prompt to set the riveting length. The "+" key on the liquid crystal screen represents increasing the riveting length. Pressing quickly represents a length of 0.1 mm, and pressing slowly represents 0.5 mm. The "-" key is the same; after the setting is completed, the trigger can be pulled to make the pulling screw rotate to install the blind rivet nut onto the thread of the pulling screw, and then pull the trigger to start riveting the blind rivet nut. After the riveting is completed, release the trigger, and the screw will reverse to automatically loosen the riveted blind rivet nut (it is also possible to automatically loosen the riveted blind rivet nut regardless of whether the trigger is released or not after the riveting is completed).

[0066] After the blind rivet nut assembly is installed, although the default mode is the blind rivet nut mode, due to the magnetic sensor at the end of the connecting shaft sensing with the sensor, the system will be set to the blind rivet nut mode and cannot be set to other modes.

[0067] When it is necessary to switch to the rivet mode, install two sets of rivet assemblies. At this time, the punch penetrates into the inner hole of the motor shaft through the inner hole of the lead screw. Pull the trigger to activate the tool, which will remind the user to set the function mode. After setting the rivet mode, it will prompt that riveting can start. Insert the rivet into the nozzle, pull the trigger until the riveting is completed and release the trigger. The tool motor will reverse and the lead screw will return to its original position (it is also possible that the motor will reverse and automatically reset regardless of whether the trigger is released or not after the riveting is completed). The waste nail rod enters the nail rod collection cylinder through the punch and the hollow motor shaft. When the misoperation mode is the blind rivet nut mode, since the moving stroke of the lead screw is very short during the installation of the blind rivet nut in the blind rivet nut mode (the planet carrier I drives the pulling screw, and the rotation speed of the planet carrier I is a geometric multiple of the rotation speed of the planet carrier II), the liquid crystal screen will alarm three consecutive times with ultra-short stroke starts to remind to adjust the setting mode or install the blind rivet nut.

[0068] When it is necessary to switch to the screwdriver drill mode, toggle the clutch switch to automatically trigger the screwdriver mode. Install the screwdriver drill assembly, pull the trigger to activate the tool, remind the user to set the function mode, and the drive sleeve I and drive sleeve II are in the clutch state. The LCD screen prompts to confirm the required rotation direction. After all confirmations, pull the trigger to start working. If the screwdriver drill assembly is installed by mistake without toggling the clutch switch, the actual mode is in the rivet modulus or rivet nut mode at this time. Since the screwdriver drill assembly has no associated drive with the lead screw assembly, the lead screw will alarm and remind to switch the mode or install a rivet (rivet nut) after three no-load reciprocating cycles.

[0069] In the rivet mode, if encountering special rivets, the riveting length of the tool can be set according to the rivet length. For example, for a 10-mm rivet, set the maximum riveting length to 10. In this way, when the riveting is completed, the lead screw will reset to facilitate the user to save operation time.

[0070] In the screwdriver drill mode, when tightening or loosening small screws, after confirming the screwdriver drill mode, long-press the function switching button, and it will prompt to set the speed reduction and rotation torque of the required number of revolutions per minute, so as not to damage the screws and related contact parts. On the contrary, the speed and torque can be increased to facilitate the user's operation.

[0071] The core point of this utility model patent is that a motor is decelerated by a reduction gearbox, and then the planet carrier drives the lead screw nut and the lead screw to perform linear reciprocating motion to complete blind riveting. The planet carrier drives the connecting shaft to provide torque output to provide rotational torque. After simple setting, it can be quickly and simply matched with other multiple mechanism parts to form different types of tools. In this utility model, the motor, reduction gearbox and lead screw assembly are on the same straight line. This mechanism has a simple structure and several modules are easy to disassemble and replace, adding the logic of function and parameter switching, magnet Hall encoder and LCD circuit board to control several tools, and achieving beneficial effects. In these several embodiments, when a connecting shaft and other mechanisms are installed in the inner hole of the lead screw, it becomes a rivet nut tool. When it is replaced with a hollow, smooth, non-step and shorter mandrel tube (for discharging waste nail rods) and other mechanisms, it becomes a rivet tool. After closing the linear function of the lead screw and installing a torque screwdriver head, it becomes an electric screwdriver.

Claims

1. A combined tool, comprising a reduction gearbox and a transmission mechanism, characterized in that, It further includes: A clutch mechanism for connecting and disconnecting the reduction gearbox and the transmission mechanism; The output end of the reduction gearbox is connected to one end of the clutch mechanism, and the other end of the clutch mechanism is connected to the transmission mechanism.

2. The combined tool according to claim 1, characterized in that, It further includes a motor, a key switch, and An adjustment unit for adjusting the stroke of the transmission mechanism and / or the forward and reverse rotation of the motor and / or the motor speed; A function switching unit for switching among three modes: the rivet nut mode, the rivet mode, and the screwdriver drill mode; A circuit control unit connected to the adjustment unit, the function switching unit, the motor, and the key switch for control.

3. The combined tool according to claim 2, characterized in that The motor and the reduction gearbox are of a hollow shaft structure; The transmission mechanism, the reduction gearbox, and the motor are located on the same straight line.

4. The combined tool according to claim 2, characterized in that The adjustment unit further includes a metering unit, and the metering unit includes one or a combination of several of, but not limited to, a magnetic ring encoder, an optical encoder, a magnetoresistive sensor, a Hall sensor, and a tensile sensor.

5. A combined tool according to any one of claims 1-4, characterized in that, The reduction gearbox includes a planet carrier I, a planet carrier II, a planetary gear set I, a planetary gear set II, a base, and a ring gear; The base is connected to the ring gear; on one side of the planet carrier I, the planetary gear set I is assembled, and on the other side, it meshes with the planetary gear set II; the planetary gear set II is assembled on one side of the planet carrier II, and on the other side, it is connected to the clutch mechanism; the planetary gear set I and the planetary gear set II are also meshed and connected to the ring gear.

6. The combination tool according to claim 5, wherein, A sensitive element is provided on the planet carrier II and / or the transmission mechanism.

7. A combination tool according to claim 5, wherein The clutch mechanism is a transmission sleeve, which is respectively connected to the planet carrier II and the transmission mechanism.

8. The combined tool according to claim 7, characterized in that The transmission sleeve includes a transmission sleeve I, a transmission sleeve II, and a clutch sleeve; The clutch sleeve is arranged between the transmission sleeve I and the transmission sleeve II, and the connection and disconnection of the transmission sleeve I and the transmission sleeve II are realized by the movement of the clutch sleeve.

9. The combination tool according to claim 8, wherein, A shift lever spring is provided on the clutch sleeve, and the top end of the shift lever spring is connected to a clutch button; the movement of the clutch sleeve is realized by the action of the clutch button on the shift lever spring.

10. A combined tool according to any one of claims 6-9, characterized in that, A rivet nut assembly, a rivet assembly, and a screwdriver bit assembly are respectively assembled outside the transmission mechanism to realize the switching among the rivet nut tool, the rivet tool, and the screwdriver bit tool.

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