Multifunctional combined tool

Abstract

The utility model discloses a multifunctional combined tool which comprises a lead screw transmission mechanism, a gear transmission mechanism and a key switch. The screw rod transmission mechanism comprises a screw rod, a nut gear and a bearing seat; the device further comprises a rotary output gear, and the rotary output gear is connected with the gear transmission mechanism and is driven to rotate. The adjusting unit is used for adjusting the stroke of the lead screw and / or adjusting the positive and negative rotation of the motor and / or 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; the switch unit triggers the gear transmission mechanism; and the circuit control unit is connected with the function switching unit, the adjusting unit, the switch unit, the motor and the key switch. The multifunctional screwdriver is simple and small, and can be combined with a rivet nut kit, a rivet kit and a screwdriver bit to form a multifunctional professional tool.

Description

Technical Field

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

[0002] Power tools are the most common tools for liberating manpower, including electric drills, electric wrenches, electric rivet tools, electric rivet nut tools, etc. Many working conditions require drilling, riveting rivets, riveting rivet nuts, screw fixing and other tasks, which require multiple tools to work together. Since each tool has a single function, the core components are not designed to replace other functional components for specific functions, and lack combination performance. Multiple tools are inconvenient to carry and costly, especially outdoor and high-altitude operations are very difficult, and are not conducive to environmental protection and energy saving.

[0003] Since rivet guns only require linear motion to produce riveting, without special design, they cannot be turned into a tool that requires rotating to install the rivet nut and can also produce riveting through linear reciprocating motion. The fully automatic rivet nut tool is a professional tool that requires rotating to install the rivet nut and then produces riveting through linear reciprocating motion. The switch setting is completely different from that of the rivet gun and electric screwdriver; the rivet nut needs to trigger the switch separately to install the rivet nut, and then pull the trigger (two actions) to complete the riveting, which requires increased rotational power and specific design changes (sacrificing performance, quick replacement, no side effects, etc.) to be used as a rivet tool. Current electric rivet nut tools usually only consider the need to replace the gun head and pull screw due to different rivet nut specifications, rather than the entire component being easily replaceable. Screwdrivers require rotary torque tools and more complex designs to become riveting tools. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a multifunctional combination tool, which is simple and compact and can be combined with a rivet nut kit, a rivet kit, and a screw and drill bit to form a multifunctional professional tool.

[0005] A multifunctional combined tool, comprising a screw transmission mechanism, a gear transmission mechanism and a key switch; the screw transmission mechanism comprises a screw, a nut gear and a bearing seat; further comprising a rotating output gear, the rotating output gear being connected to the gear transmission mechanism and being driven to rotate; an adjusting unit, used for adjusting the screw stroke and / or the forward and reverse rotation of the motor and / or the motor speed;

[0006] A function switching unit is used for switching among three modes: rivet nut mode, rivet mode and screwdriver electric drill mode; a switch unit triggers the gear transmission mechanism; and a circuit control unit is connected with the adjustment unit, the function switching unit, the switch unit, the motor and the key switch.

[0007] Furthermore, the rivet nut mode is that the motor work is switched to the screw rod motion tension output combined with the gear rotation torque output; the rivet mode is that the motor work is switched to the screw rod linear motion tension output; the screwdriver and electric drill mode is that the motor work is switched to the rotation output gear rotation torque output.

[0008] Furthermore, the switch unit includes a positioning block, which is arranged at the rear end of the screw rod, and a rebound block is arranged on the positioning block; a spring is arranged between the rebound block and the positioning block so that the rebound block and the positioning block are fitted together; a touch switch is arranged on the rebound block; and a magnet seat with a magnet is arranged on the upper end of the positioning block.

[0009] Furthermore, the circuit control unit is provided with sensors corresponding to the regulating unit and the switching unit.

[0010] Furthermore, the adjustment unit also includes a screw stroke metering unit, and the screw stroke metering unit includes but is not limited to one or a combination of a magnetic ring encoder, a photoelectric encoder, and a magnetoresistive sensor.

[0011] Furthermore, it also includes a connecting piece for connecting an external rivet nut assembly or a rivet assembly or a screw and drill bit kit.

[0012] Furthermore, the gear transmission mechanism includes a power output device, a transmission shaft and a shaft gear; the transmission shaft is connected to the power output device, and a pinion gear and a slidable shaft gear are arranged on the transmission shaft; the shaft gear cooperates with the nut gear in the screw transmission mechanism; the pinion gear is connected with the rotating output gear.

[0013] Furthermore, the rotary output gear is arranged in the screw transmission mechanism.

[0014] Furthermore, the shaft gear and the pinion gear are arranged on the same end of the transmission shaft; the shaft gear can slide axially and rotate radially; and the pinion gear is arranged on the end of the transmission shaft away from the shaft gear.

[0015] Furthermore, the rotary output gear is fixedly connected to the connecting member, and the rotary output gear drives the connecting member to rotate.

[0016] Furthermore, a shaft gear is arranged at one end of the transmission shaft on the power output device close to the screw rod, and a pinion gear is arranged at the other end.

[0017] Furthermore, the power output device includes a motor, an output shaft, a power gear and a reduction gear; the power gear is cooperatively connected with the reduction gear, and the reduction gear is arranged on the transmission shaft.

[0018] Furthermore, it also includes a rivet nut assembly 1; the rivet nut assembly 1 includes a connecting shaft, a guide connecting sleeve, a connecting nut, a rotating connecting shaft, a clutch fixing sleeve and a pulling screw; the guide connecting sleeve is connected to the rotating output gear; the connecting nut is arranged in the guide connecting sleeve, one end of which is connected to the screw rod, and the other end is connected to one end of the rotating connecting shaft; the other end of the rotating connecting shaft is connected to the pulling screw; a clutch fixing sleeve is arranged outside the pulling screw and the rotating connecting shaft, and a spring is arranged between the clutch fixing sleeve and the connecting nut; the connecting shaft passes through the screw rod, one end of which is connected to the rotating connecting shaft, and the other end is inserted into the connecting piece; the connecting shaft is radially fixed in the connecting piece, axially slides, and can drive the connecting piece to rotate; a protruding shaft is arranged on the outer circle of the rotating connecting shaft, and a guide groove is arranged on the outer circle of the guide connecting sleeve and the clutch fixing sleeve; the protruding shaft extends out of the guide groove of the clutch fixing sleeve and extends into the guide groove of the guide connecting sleeve at the same time.

[0019] Furthermore, it also includes a rivet nut component 2, which includes an outer sleeve, an adjusting nut and a gun head; the rivet nut component 2 is fixed on the front bearing seat and is arranged outside the rivet nut component 1.

[0020] Furthermore, it also includes a rivet assembly 1; the rivet assembly 1 includes a spring sleeve, a clamping sleeve, a top core, a top core spring and three claws;

[0021] One end of the spring sleeve is connected to the screw rod, and the other end is connected to one end of the clamping sleeve; the three claws are arranged between the clamping sleeve and the spring sleeve; the top core passes through the screw rod, the spring sleeve and the clamping sleeve, one end of the top core supports the three claws, and the other end is inserted into the connecting piece; the top core can slide axially in the connecting piece, but cannot drive the connecting piece to rotate.

[0022] Furthermore, it also includes a rivet component 2, which includes an outer sleeve, a gun nozzle and a fixed screw cap; the rivet component 2 is fixed on the front bearing seat and is arranged outside the rivet component 1.

[0023] Furthermore, it also includes a screw and drill bit kit; the screw and drill bit kit includes a power connecting sleeve, an external fixed screw nut, a transmission connecting piece, a drill bit or a drill bit; one end of the power connecting sleeve is connected to the transmission connecting piece, and the other end is equipped with a drill bit or a drill bit; the transmission connecting piece is connected to the connecting piece; the power connecting sleeve is arranged in the external fixed screw nut.

[0024] The utility model tool utilizes a combination of screw drive and gear drive, and the two drives are related to each other or independent of each other. The output linear reciprocating motion of the screw drive with this characteristic is combined with the rivet structure to form a rivet tool, the output linear reciprocating motion of the screw drive with this characteristic is combined with the output rotational torque of the gear drive and the rivet nut structure to form a rivet nut tool, the output rotational torque of the gear drive with this characteristic is combined with the torque mechanism to form an electric screwdriver, and the output rotational torque characteristic is combined with the drill bit to form an electric drill. Several replacement mechanism parts are independent of each other, easy to replace, and simple to operate in combination, so that drilling, riveting rivets, riveting nuts, installing screws and other tasks can be completed with only the same tool.

[0025] The utility model has well-designed common parts. When in use, the corresponding functions can be realized by assembling the rivet nut kit, the rivet kit, and the screw with the drill bit. One tool has multiple functions, which greatly expands the use scenarios. It provides users with portability and convenience, reduces the space required for use and placement, greatly saves various costs, and is extremely user-friendly and intelligent. It increases the fun of module combination during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of Embodiment 1 of the present utility model;

[0027] Figure 2 This is a three-dimensional structural diagram of the rotary output gear of Example 1 of the utility model;

[0028] Figure 3 This is a three-dimensional diagram of the connection between the transmission shaft, the shaft gear and the pinion gear in Example 1 of the utility model;

[0029] Figure 4 It is a cross-sectional view of Embodiment 2 of the present utility model;

[0030] Figure 5 A cross-sectional view of Example 3 of the utility model.

[0031] Figure 6 This is a schematic diagram of the connection between the transmission shaft and the shaft gear in Example 3 of the utility model;

[0032] Figure 7 This is a cross-sectional schematic diagram of a rivet nut assembly according to Embodiment 4 of the present utility model;

[0033] Figure 8 This is a schematic cross-sectional view of a rivet nut assembly according to Embodiment 4 of the present utility model;

[0034] Fig. 9 This is a schematic diagram of a three-dimensional structure of a portion of a rivet nut assembly according to Embodiment 4 of the present utility model;

[0035] Fig.10 This is a cross-sectional view of the three-dimensional structure of the rivet nut assembly 1 and 2 after assembly according to the fourth embodiment of the utility model;

[0036] Fig.11 This is a schematic diagram of the three-dimensional structure of Example 4 of the utility model assembled on Example 1;

[0037] Fig.12 This is a schematic diagram of the three-dimensional structure of Example 4 of the utility model assembled on Example 2;

[0038] Fig.13 This is a schematic diagram of the three-dimensional structure of Example 4 of the utility model assembled on Example 3;

[0039] Fig.14 This is a cross-sectional schematic diagram of a rivet assembly of Embodiment 5 of the present utility model;

[0040] Fig.15 This is a schematic cross-sectional view of a rivet assembly according to Embodiment 5 of the present utility model;

[0041] Fig.16 This is a cross-sectional view of the three-dimensional structure of the rivet components 1 and 2 after assembly according to Embodiment 5 of the utility model;

[0042] Fig.17 This is a schematic diagram of the three-dimensional structure of Example 5 of the utility model assembled on Example 1;

[0043] Fig.18 This is a schematic diagram of the three-dimensional structure of Example 5 of the utility model assembled on Example 2;

[0044] Fig.19 This is a schematic diagram of the three-dimensional structure of Example 5 of the utility model assembled on Example 3;

[0045] Fig. 20 This is a cross-sectional schematic diagram of a screw and drill bit kit according to Embodiment 6 of the present utility model;

[0046] Fig.21 This is a cross-sectional view of the three-dimensional structure of the screw drill bit kit after assembly according to Embodiment 6 of the present utility model;

[0047] Fig. 22 This is a schematic diagram of the three-dimensional structure of Example 6 of the utility model assembled on Example 1;

[0048] Fig.23 This is a schematic diagram of the three-dimensional structure of Example 6 of the utility model assembled on Example 2;

[0049] Fig.24 This is a schematic diagram of the three-dimensional structure of Example 6 of the utility model assembled on Example 3; DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0051] A multifunctional combined tool, including a screw transmission mechanism, a gear transmission mechanism and a key switch; the screw transmission mechanism is a conventional mechanism in motor tools, including a screw, a nut gear, a bearing seat, etc. This part is conventional technology, and the applicant does not further explain the connection position relationship. The utility model also includes:

[0052] The rotary output gear is connected to the gear set in the gear transmission mechanism and is driven to rotate. The rotary output gear is mainly set to drive the pull screw in the assembled rivet nut assembly to rotate forward and reverse to install and remove the nut in the rivet nut mode, and to drive the screwdriver to loosen and tighten the screw in the screwdriver and electric drill mode.

[0053] The adjustment unit is used to adjust the screw stroke and / or the forward and reverse rotation of the motor and / or the motor speed. The adjustment unit is adjusted by the "+" and "-" buttons set on the circuit control unit. Various adjustment parameters and data are pre-written and recorded into the chip of the circuit control unit.

[0054] The function switching unit is used to switch between the three modes of rivet nut mode, rivet mode and screwdriver electric drill mode. In the rivet nut mode, the motor work is switched to the screw rod motion tension output combined with the gear rotation torque output; in the rivet mode, the motor work is switched to the screw rod linear motion tension output; in the screwdriver electric drill mode, the motor work is switched to the rotation output gear rotation torque output. The function switching unit is specifically implemented 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.

[0055] The default setting mode of the tool is the rivet nut mode. After the two sets of rivet nut components are installed on the tool body, pull the trigger, the tool is activated, and the user is reminded to set the function mode. After confirming the rivet nut function, it is prompted to set the riveting length. The "10" key on the LCD screen represents increasing the riveting length. A quick press represents 0.1mm length, and a slow press represents 0.5mm. The same applies to the "1" key. After the setting is completed, the rivet nut can be installed on the thread of the pull screw by triggering the pull screw to rotate the screw, and then the trigger is pulled to start riveting the rivet nut. After the riveting is completed, release the trigger to end the riveting, and the screw reverses to automatically loosen the riveted rivet nut (it can also automatically loosen the riveted rivet nut regardless of whether the trigger is released after the riveting is completed).

[0056] When you need to switch to the rivet mode, install two sets of rivet components, pull the trigger to activate the tool, and you will be prompted to set the function mode. After setting the rivet mode, you will be prompted to start riveting. Insert the rivet into the gun nozzle, pull the trigger, release the trigger until the riveting is completed, and the tool motor will reverse and reset the screw rod (the motor can also reverse and reset automatically when the riveting is completed regardless of whether the trigger is released or not).

[0057] When you need to switch to the screwdriver and drill mode, install the two sets of screwdriver components, pull the trigger to activate the tool, and you will be prompted to set the function mode. After confirming the setting of the screwdriver and drill mode, you will be prompted to confirm that the nut gear and the shaft gear are in a clutch state, and prompted to confirm the required rotation direction. After confirming both, pull the trigger to start working. If the user mistakenly operates the nut gear and the shaft gear in a meshing state to start working, the screwdriver head will cycle forward and reverse between the front and rear Hall sensors. Once more than one forward and reverse rotation occurs, the tool will alarm to prompt confirmation that the shaft gear needs to be clutched with the nut gear.

[0058] If you encounter special rivets in the rivet mode, you can set the riveting length of the tool according to the rivet length. For example, for a 10 mm rivet, set the maximum riveting length to 10. In this way, the screw rod will be reset when the riveting is completed, so that the user can save operation time.

[0059] In screwdriver mode, if you want to tighten or loosen small screws, after confirming the screwdriver and electric drill mode, long press the function switch button to prompt the speed setting of the required number of revolutions per minute to reduce the speed and rotation torque so as not to damage the screws and related contacts. Conversely, you can increase the speed and torque to facilitate user operation.

[0060] The above-mentioned adjustment unit also includes a screw stroke metering unit, which is used to feed back the number of screw rotations to the circuit control unit. The screw stroke metering unit includes but is not limited to one or a combination of a magnetic ring encoder, a photoelectric encoder, a magnetic resistance sensor, a Hall sensor, and a tension sensor. The adjustment unit includes but is not limited to being set on a connector, a rotating output gear, a screw, and a nut gear.

[0061] The switch unit is used to trigger the rotation of the motor in the gear transmission mechanism; the switch unit includes a positioning block, which is arranged at the rear end of the screw rod, and a rebound block is arranged on the positioning block; a spring is arranged between the rebound block and the positioning block, so that the rebound block and the positioning block fit together; a touch switch is arranged on the rebound block; a magnet seat with a magnet is arranged on the upper end of the positioning block. Since the key switch can already start the motor, adding a switch unit (the touch switch is the best, and the switch unit includes but is not limited to the touch switch, and can also be operated by the trigger more than once) is to trigger the installation of the rivet nut separately.

[0062] The circuit control unit is connected with the adjustment unit, the function switching unit, the switch unit, the motor and the key switch. It can be a circuit control board with a liquid crystal display. The circuit control unit is provided with sensors corresponding to the adjustment unit (actually the screw rod stroke metering unit) and the switch unit. The LCD screen displays the tool status, which are three modes: rivet, rivet nut, screwdriver and electric drill; three buttons are provided on the circuit control unit, "+" and "-" buttons, which control the stroke (rivet nut, rivet mode) and forward and reverse rotation (screwdriver and electric drill mode), and the other button is a switch button for the function mode.

[0063] The connecting piece is arranged at the tail end of the tool, and the inner hole is hexagonal, and is used to connect the connecting shaft in the external rivet nut assembly or the top core in the rivet assembly or the transmission connecting piece in the screw drill bit kit.

[0064] The utility model gear transmission mechanism comprises a power output device, a transmission shaft and a shaft gear; the transmission shaft is connected with the power output device, a pinion gear and a slidable and clutchable shaft gear are arranged on the transmission shaft; the shaft gear matches with a nut gear in a screw transmission mechanism; the pinion gear matches with a rotating output gear.

[0065] The utility model also includes a shell, which contains and fixes various components. Since it is a conventional arrangement, no further description or illustration is given.

[0066] After the motor decelerates, it drives the transmission shaft to rotate, the transmission shaft drives the shaft gear, the gear on the shaft gear drives the nut gear, and the nut gear drives the screw rod to move in a straight line to achieve rivet riveting or rivet nut riveting; at the same time, the transmission shaft can also drive the pinion gear to rotate, the gear is meshed with the rotating output gear, and drives the rotating output gear to rotate (the rotating output gear can drive the pull-out screw rod in the rivet nut mode to rotate forward and reverse to install and remove the nut, and drive the screwdriver to loosen the screw, etc.). In addition, when the front end of the shaft gear slides into the pinion gear, the shaft gear and the gear on the nut of the screw rod are disengaged, and at this time, all power is transmitted to the rotating output gear outside the screw rod. When the gear on the shaft gear is in meshing with the nut gear, the motor power is diverted, most of the power is used to realize the reciprocating movement of the screw rod to achieve riveting or other needs (including but not limited to rivet riveting and rivet nut riveting), and a small part of the power is used to install the rivet nut on the pull-out screw rod and loosen the riveted nut from the pull-out screw rod after riveting. In actual use, the tightening and loosening forces for installing and loosening rivet nuts are relatively small, and the size of this small tightening and loosening force is the elastic force of the screw pressing the butterfly gasket. When a larger torque is required, the shaft gear and the gear of the screw nut are disengaged, and all power is transmitted to the rotating output gear through the transmission shaft and the external pinion of the transmission shaft to output torque in the forward and reverse directions. At this time, the screw and nut gear are both stationary. Example 1

[0067] like Figure 1 , 2 As shown in Figures 3 and 4, the rotary output gear 4 of this embodiment is arranged in the screw transmission mechanism. The screw transmission mechanism includes a front bearing seat 1, a rear bearing seat 2, a screw 3, a nut gear 20, and a bearing. The rotary output gear 4 includes a main body 401 and a gear 402 arranged on one end of the main body 401. A through hole is arranged in the middle of the main body 401, and the through hole is passed through by the front end of the screw 3, and the rotary output gear 4 has no connection relationship with the screw; a latching tooth 404 is arranged at the other end of the main body 401 for fixing with an external kit. The rotary output gear 4 is arranged between the front bearing seat 1, the rear bearing seat 2 and the screw 3, and is axially fixed and can rotate radially; the gear 402 of the rotary output gear 4 passes through the rear bearing seat 2 and is connected with the gear transmission mechanism.

[0068] The switch unit of this embodiment includes a positioning block 5, which is arranged at the rear end of the screw rod 3. The positioning block 5 is provided with two conduction shafts 6. The rebound block 7 slides on the two conduction shafts 6. A spring 8 is arranged between the rebound block 7 and the conduction shaft 6, so that the rebound block 7 and the positioning block 5 are fitted together; a normally closed touch switch 9 is arranged on the rebound block 7, and a rotating sleeve is sleeved on the inner hole of the rebound block 7. The inner hole of the rotating sleeve is multi-grooved (hexagonal); a magnet seat 11 with a magnet is arranged at the upper end of the positioning block 5, and the magnet corresponds to the sensor of the circuit control unit at the upper end, and transmits a signal through current and feeds it back to the circuit control unit.

[0069] The screw stroke metering unit of this embodiment is a magnetic ring encoder 12, which is sleeved on a connecting piece 13. The connecting piece 13 and the screw 3 are located on the same axis. The connecting piece 13 is axially fixed and can rotate radially; the inner hole 14 of the connecting piece 13 near one end of the rebound block is hexagonal, and most of the other end is a circular hole (the inner hole can also be selected to be all hexagonal). The magnetic ring encoder 12 corresponds to the sensor 15 set on the circuit control unit, and the sensor 15 detects the number of revolutions of the round tube in real time and feeds back to the circuit control unit.

[0070] The gear transmission device of the utility model comprises a motor 16, a reducer 17 and a transmission shaft 18, one end of the transmission shaft 18 is connected to the reducer 17, and the other end is fixed on the rear bearing seat 2, which is a conventional technology. The difference is that the transmission shaft of the utility model is provided with a shaft gear 19 that can slide axially and rotate radially, and the shaft gear 19 cooperates with the nut gear 20 to drive the screw rod to move back and forth linearly; a pinion 21 is provided on the end of the transmission shaft 18 away from the shaft gear 19, and the pinion 21 cooperates with the extended rear bearing seat and the rotating output gear 4; when the shaft gear 19 is forced to slide and clutch, the shaft gear 19 is separated from the nut gear 20, and the front end of the shaft gear 19 is connected with the pinion 21. A convex tooth 22 is provided at the front end of the shaft gear, and a plurality of slots 23 are provided on the pinion, and the convex tooth 22 is inserted into the slot 23 and fixed. At this time, all power is transmitted to the rotating output gear 4 through the transmission shaft 18 and the pinion 21 outside the transmission shaft to provide forward and reverse rotating output torque. In addition, a spline 24 is provided on the transmission shaft, and a keyway is provided at the opposite position in the shaft gear, and the two cooperate to achieve radial fixation and axial sliding. Example 2

[0071] like Figure 4 As shown, the main difference between this embodiment and embodiment 1 is that the rotary output gear is arranged at the other end of the transmission shaft.

[0072] As shown in the figure, the front transmission shaft 25 of the power output device is provided with a shaft gear 19, and the rear transmission shaft 26 is provided with a pinion gear 21. At this time, the rotating output gear 4 matched with the pinion gear 21 is fixed on the connecting member 13, and the inner hole of the connecting member 13 is hexagonal, and a magnetic ring encoder is provided on it. Other settings are the same as those in Example 1. Example 3

[0073] like Figure 5 , 6 As shown, the main difference between this embodiment and embodiments 1 and 2 lies in the arrangement of the gear transmission mechanism and the rotary output gear.

[0074] The gear transmission mechanism includes a power output device, a transmission shaft 26 and a shaft gear 19; the power output device includes a motor 16, an output shaft 27, a power gear 28 and a reduction gear 29; the output shaft 27 is provided with a power gear 28, the power gear 28 is matched and connected with the reduction gear 29, and the reduction gear 29 is provided on the transmission shaft 26; an inner groove 30 is provided at one end of the transmission shaft 26, and one end of the shaft gear 19 is slidably assembled in the inner groove 30, and a limiting protrusion 31 is also provided on the shaft gear 19 for limiting the sliding distance of the shaft gear 19 in the inner groove 30. The rack 32 provided on the shaft gear is matched and connected with the nut gear 20. Example 4

[0075] like Figure 7-13As shown, when the utility model becomes a rivet nut tool, a rivet nut kit needs to be assembled. In the original state of the utility model, it is a rivet nut mode.

[0076] The rivet nut kit includes a rivet nut component 1 and a rivet nut component 2; the rivet nut component 1 includes a connecting shaft 33, a guide connecting sleeve 34, a connecting nut 35, a rotating connecting shaft 36, a clutch fixing sleeve 37 and a pulling screw 38; the guide connecting sleeve 34 is connected to the rotating output gear 4; the connecting nut 35 is arranged in the guide connecting sleeve 34, one end of which is connected to the screw rod, and the other end is connected to one end of the rotating connecting shaft 36; the other end of the rotating connecting shaft 36 is provided with an internal thread, which is matched and connected with the pulling screw 38; a clutch fixing sleeve 34 is arranged outside the pulling screw 38 and the rotating connecting shaft 36, and a spring is arranged between the clutch fixing sleeve 34 and the connecting nut 35.

[0077] The connecting shaft 33 passes through the rotating sleeve of the screw rod and the rebound block, one end of which is connected to the rotating connecting shaft 36, and the other end is inserted into the connecting piece 13; the connecting shaft 33 passes through the screw rod section and is in a round tube shape, forming a round tube connecting shaft 3301; from this section onwards, it is in a hexagonal shape, forming a hexagonal connecting shaft 3302; the hexagonal connecting shaft 3302 is connected to the rebound block through a rotating sleeve, and the rotating sleeve is set in the rebound block 7, and its inner hole is hexagonal. The hexagonal connecting shaft 3302 is inserted into the connecting piece and connected with the multiple grooves in the connecting piece, radially fixed, axially sliding, and can drive the connecting piece 13 to rotate radially. The diameter of the hexagonal connecting shaft 3302 is smaller than the round tube connecting shaft 3301, so that a step 3304 is formed at the connection between the hexagonal connecting shaft and the round tube connecting shaft, and the step can push the rebound block to trigger the touch switch on the elastic block.

[0078] like Fig. 9 As shown, a protruding shaft 39 is arranged on the outer circle of the rotating connecting shaft 36, and a guiding groove 40 is arranged on the outer circle of the guiding connecting sleeve 34 and the clutch fixing sleeve 37; the protruding shaft 39 extends out of the guiding groove of the clutch fixing sleeve 37, and at the same time extends into the guiding groove of the guiding connecting sleeve 34. The rotating output gear 4 drives the guiding connecting sleeve 34 to rotate, and the guiding groove of the guiding connecting sleeve 34 drives the protruding shaft 39 of the rotating connecting shaft 36, drives the rotating connecting shaft 36, and the transmission hexagonal shaft on the rotating connecting shaft 36 drives the connecting piece 13 at the tail, and the connecting piece 13 and the circuit control board sense and calculate the number of rotations and the stroke, and at the same time, the rotating connecting shaft 36 drives the drawing screw to rotate and install and loosen the rivet nut.

[0079] The second rivet nut assembly includes an outer sleeve 41, an adjusting nut 42 and a gun head 43, which is a conventional technology. During assembly, insert the connecting shaft into the screw hole, pass through the multi-groove inner hole of the rebound block, and directly reach the inner hole of the connector. Push the guide connecting sleeve to the front end of the tool, and then tighten the exposed and visible connecting nut with the inner thread on the outer thread at the front of the screw. Then pass the guide connecting sleeve through the inner hole of the front bearing seat, and fix the teeth of the guide connecting sleeve and the teeth of the rotating output gear to make them fit together. Then install the second rivet nut assembly, tighten the screw cap 44, and the axial direction of the guide connecting sleeve is limited. After the two components are installed, a rivet nut tool is formed.

[0080] The utility model is in the rivet nut mode in its original state. During operation, when the pull screw is triggered, the hexagonal connecting shaft moves backward and pushes the rebound block to move slightly toward the rear end of the tool, so that the normally closed switch disconnected above the rebound block is loosened and restored to the normally closed state. The motor drives the rotating installation nut. When the nut is in place and the pull screw is subjected to back pressure, the normally closed switch is disconnected and the motor stops working. Pull the tool trigger switch again to start riveting. At this time, the screw nut generates a large riveting pressure, causing the small gear with limited torque to start slipping. The screw drives the rivet nut on the pull screw to continue to move backward until the riveting is completed. Release the trigger switch, the screw moves forward to reset, the pressure on the rotating output gear is released, and it can rotate freely and the power is restored. The riveted rivet nut is reversed to loosen, and the riveting work is completed.

[0081] In this embodiment, the required stroke can be adjusted according to the riveting effect by pressing the "+" and "-" buttons on the circuit control board. The LCD screen circuit control board chip sets the default mode to the rivet nut mode. The tool cannot operate normally by only pulling the trigger, unless the rebound block is pushed first to energize the touch switch. Otherwise, repeated pulling of the trigger will cause an alarm to prompt the mode to switch. Example 5

[0082] like Figure 14-19 As shown, when the utility model becomes a rivet tool, a rivet kit needs to be assembled. The rivet kit includes a rivet component 1 and a rivet component 2.

[0083] Rivet assembly 1 includes a spring sleeve 45, a clamping sleeve 46, a top core 47, a top core spring 48 and three claws 49; one end of the spring sleeve 45 is connected to the screw rod, and the other end is connected to one end of the clamping sleeve 46; the three claws 49 are arranged between the clamping sleeve 46 and the spring sleeve 45; the top core 47 passes through the rebound block, the screw rod, the spring sleeve, and the clamping sleeve, one end of the top core 47 presses against the three claws 49, and the other end is inserted into the connecting piece 13; the top core 47 can slide axially in the connecting piece 13, but cannot drive the connecting piece to rotate.

[0084] The three claws are combined together, and the clamping sleeve and the spring sleeve are threaded and fixed to form an independent component, which is easy to carry and install. Since the top core tube has a smooth outer circle, when it penetrates the inner hole of the screw rod, the inner hole of the rebound block, and directly inserts into the connecting piece, the smooth outer circle wall of the top core tube cannot provide force to trigger the switch on the rebound block, nor can it drive the connecting piece. At this time, the inner hole of the connecting piece becomes the discharge connection pipe of the waste nail rod. After riveting, the waste nail rod passes through the inner hole of the magnetic ring encoder and flows into the tool waste nail rod collection tube.

[0085] The rivet assembly 2 includes an outer sleeve 50, a gun nozzle 51, and a fixed screw cap 52, using conventional technology. During assembly, the top core 47 is passed through the inner hole of the screw rod 3, then through the inner hole of the rebound block 7, and then inserted into the inner hole of the connecting piece 13. The inner thread of the spring sleeve 45 is tightened with the outer thread of the screw rod 3, and then the rivet mechanism 2 is installed, and the fixed screw cap 52 on the outside of the outer sleeve 50 is tightened, so that it becomes a rivet tool.

[0086] The long top core tube has no step protrusion and cannot trigger the touch switch on the rebound block. When the trigger is pulled twice or more continuously, the tool will switch the alarm prompt function to the rivet mode, and pull the trigger switch to realize pull riveting. During the entire riveting process, since there is no connecting parts at the front end of the rotating output gear, the rotating output gear and the pinion are in a free rotation state or a slipping state.

[0087] When the rivet mode is turned on, press the function button. After the LCD screen displays the rivet function, you can start riveting. The power of the rotating output gear is terminated, and the motor power is mainly used to rivet rivets. At this time, the adjustment unit can adjust the riveting stroke according to different rivet requirements. The rest is a regular riveting process and will not be further described. Example 6

[0088] like Figure 20-24 As shown, when the utility model is used as a screwdriver and an electric drill tool, a screw and drill bit kit needs to be assembled.

[0089] The screw and drill bit set includes a power connection sleeve 53, an external fixed screw cap 54, a transmission connection piece 55, and a drill bit or a drill bit 56; one end of the power connection sleeve 53 is connected to the transmission connection piece 55, and the other end is equipped with a drill bit or a drill bit 56; the transmission connection piece 55 is connected to the connection piece 13. The power connection sleeve 53 is fixedly connected by the locking teeth provided at one end and the locking teeth of the rotating output gear 4.

[0090] During assembly, pass the transmission connector through the inner hole of the screw rod, then through the inner hole of the rebound block, and then insert it into the inner hole of the connector. Engage the power connection sleeve with the rotating output gear through the inner hole of the front bearing seat, screw on the external fixing screw cap to axially fix the power connection sleeve, and then insert the drill bit (or drill bit) into the inner hole of the power connection sleeve. This will become a torque screwdriver or electric drill tool (the shaft gear needs to be manually pushed to connect with the pinion gear). At the same time, the transmission connector cannot drive the connector.

[0091] If there is nothing passing through the screw hole, the tool cannot be set to rivet nut mode and rivet mode (this design is not a utility model point and will not be explained in detail). The tool can be set to screwdriver and electric drill mode to start the motor (at this time, the LCD screen will prompt that the toggle shaft gear and the pinion gear are engaged). For example, the Hall coil can be set. If there is no engagement, the starting Hall position will rotate forward, and when it reaches the second Hall position, it will reverse and reset. The tool will cycle forward and reverse between the two sensors on the LCD screen. If the forward and reverse rotation is continued, the LCD screen circuit board will alarm to prompt that the toggle shaft gear and the pinion gear are engaged.

[0092] Move the shaft gear forward on the transmission shaft to start the screwdriver and electric drill mode. The screw nut gear does not receive torque output and is in a stationary state. The tool power will output all the torque to the rotating output gear, which is then transmitted to the power connecting sleeve to loosen or tighten the screws or drill holes. The "+" and "-" buttons are used to switch the motor forward and reverse rotation. At this time, the function switching unit can adjust the forward and reverse speeds according to different requirements (after pressing the switch button to display the correct rotation direction, continue to switch the speed function to switch to the required speed).

[0093] The core point of the utility model patent is that a motor drives the screw rod to move back and forth in a straight line to complete the riveting, and at the same time, the motor drives the gear reduction to provide torque output and rotational torque. After simple setting, it can be quickly and easily matched with one or two of the other multiple mechanism parts to form different types of tools. In the process of composing the tool, this mechanism uses a hexagonal connecting shaft to push the elastic block switch to solve the problem of installing the nut switch on the rivet nut. The structure is simple and easy to disassemble and replace. It adds the logic of function and parameter switching, magnetic ring encoder and LCD circuit board to control several tools, and achieves beneficial effects. In these several embodiments, the inner hole of the screw rod is equipped with a hexagonal connecting shaft with a boss (the boss can trigger the touch switch) and other mechanisms to form a rivet nut tool, which is replaced with a hollow, smooth, stepless top core tube (used as a waste nail rod discharge tube) and other mechanisms to form a rivet tool, and a torque bit is installed to become an electric screwdriver.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional combination tool, comprising a screw transmission mechanism, a gear transmission mechanism and a key switch; the screw transmission mechanism comprises a screw, a nut gear and a bearing seat; characterized in that: Also includes, A rotating output gear, wherein the rotating output gear is connected to the gear transmission mechanism and is driven to rotate; An adjustment unit, used for adjusting the screw stroke and / or the forward and reverse rotation of the motor and / or the motor speed; Function switching unit, used for switching among three modes: rivet nut mode, rivet mode and screwdriver electric drill mode; A switch unit triggers the gear transmission mechanism; A circuit control unit is connected with the regulating unit, the function switching unit, the switch unit, the motor and the key switch.

2. A multifunctional combination tool according to claim 1, characterized in that: The rivet nut mode is that the motor work is switched to the screw movement tension output combined with the gear rotation torque output; The rivet mode is that the motor work is switched to the screw rod linear motion tension output; The screwdriver and electric drill mode is that the motor works and switches to the rotating output gear to output the rotating torque.

3. A multifunctional combination tool according to claim 1, characterized in that: The switch unit includes a positioning block, which is arranged at the rear end of the screw rod, and a rebound block is arranged on the positioning block; a spring is arranged between the rebound block and the positioning block so that the rebound block and the positioning block are fitted together; a touch switch is arranged on the rebound block; and a magnet seat with a magnet is arranged on the upper end of the positioning block.

4. A multifunctional combination tool according to claim 1, characterized in that: The circuit control unit is provided with sensors corresponding to the regulating unit and the switching unit.

5. A multifunctional combination tool according to claim 1, characterized in that: The regulating unit also includes a screw stroke metering unit, which includes but is not limited to one or a combination of a magnetic ring encoder, a photoelectric encoder, a magnetoresistive sensor, a Hall sensor, and a tension sensor.

6. A multifunctional combination tool according to claim 1, characterized in that: Also included are connectors for connecting external rivet nut assemblies or rivet assemblies or screw and drill bit sets.

7. A multifunctional combination tool according to any one of claims 1 to 6, characterized in that: The gear transmission mechanism includes a power output device, a transmission shaft and a shaft gear; The transmission shaft is connected to the power output device, and a pinion gear and a shaft gear that can slide and engage; The shaft gear cooperates with the nut gear in the screw drive mechanism; the pinion gear cooperates with the rotary output gear.

8. A multifunctional combination tool according to claim 7, characterized in that: The rotary output gear is arranged in the screw transmission mechanism.

9. A multifunctional combination tool according to claim 8, characterized in that: The shaft gear and the pinion are arranged on the same end of the transmission shaft; the shaft gear can slide axially and rotate radially; and the pinion is arranged on the end of the transmission shaft away from the shaft gear.

10. A multifunctional combination tool according to claim 9, characterized in that: The rotating output gear is fixedly connected to the connecting piece, and the rotating output gear drives the connecting piece to rotate.

11. A multifunctional combination tool according to claim 10, characterized in that: A shaft gear is arranged at one end of the transmission shaft on the power output device close to the screw rod, and a pinion gear is arranged at the other end.

12. The multifunctional combination tool according to claim 10, characterized in that: The power output device comprises a motor, an output shaft, a power gear and a reduction gear; the power gear is cooperatively connected with the reduction gear, and the reduction gear is arranged on the transmission shaft.

13. A multifunctional combination tool according to any one of claims 8 to 10, characterized in that: Also includes a rivet nut assembly 1; The rivet nut assembly 1 comprises a connecting shaft, a guide connecting sleeve, a connecting nut, a rotating connecting shaft, a clutch fixing sleeve and a pulling screw; The guide connecting sleeve is connected to the rotating output gear; the connecting nut is arranged in the guide connecting sleeve, one end of which is connected to the screw rod, and the other end is connected to one end of the rotating connecting shaft; the other end of the rotating connecting shaft is connected to the drawing screw; a clutch fixing sleeve is arranged outside the drawing screw and the rotating connecting shaft, and a spring is arranged between the clutch fixing sleeve and the connecting nut; The connecting shaft passes through the screw rod, one end of which is connected to the rotating connecting shaft, and the other end is inserted into the connecting piece; the connecting shaft is radially fixed in the connecting piece, axially slides, and can drive the connecting piece to rotate; The outer circle of the rotating connecting shaft is provided with a protruding shaft, and the outer circles of the guiding connecting sleeve and the clutch fixing sleeve are provided with guiding grooves; The protruding shaft extends out of the guide groove of the clutch fixing sleeve and at the same time extends into the guide groove of the guide connecting sleeve.

14. A multifunctional combination tool according to claim 13, characterized in that: It also includes a rivet nut component 2, which includes an outer sleeve, an adjusting nut and a gun head; the rivet nut component 2 is fixed on the front bearing seat and is arranged outside the rivet nut component 1.

15. A multifunctional combination tool according to any one of claims 8 to 10, characterized in that: It also includes a rivet assembly 1; the rivet assembly 1 includes a spring sleeve, a clamping sleeve, a top core, a top core spring and three claws; One end of the spring sleeve is connected to the screw rod, and the other end is connected to one end of the clamping sleeve; the three claws are arranged between the clamping sleeve and the spring sleeve; the top core passes through the screw rod, the spring sleeve and the clamping sleeve, one end of the top core supports the three claws, and the other end is inserted into the connecting piece; the top core can slide axially in the connecting piece, but cannot drive the connecting piece to rotate.

16. A multifunctional combination tool according to claim 15, characterized in that: It also includes a rivet component 2, which includes an outer sleeve, a gun nozzle and a fixed screw cap; the rivet component 2 is fixed on the front bearing seat and is arranged outside the rivet component 1.

17. A multifunctional combination tool according to any one of claims 8 to 10, characterized in that: Also included is a screw cape drill bit kit; The screw drill bit kit comprises a power connection sleeve, an external fixed screw cap, a transmission connection piece, a drill bit or a drill bit; one end of the power connection sleeve is connected to the transmission connection piece, and the other end is equipped with a drill bit or a drill bit; the transmission connection piece is connected to the connection piece; The power connection sleeve is arranged inside the outer fixed screw cap.

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