Multifunctional combined tool

Abstract

A multifunctional combined tool, comprising a lead screw transmission mechanism, a gear transmission mechanism, and a button switch. The lead screw transmission mechanism comprises a lead screw (3), a nut gear (20), and a bearing base. The multifunctional combined tool further comprises: a rotating output gear (4), the rotating output gear being connected to the gear transmission mechanism and being driven to rotate; an adjustment unit, configured to adjust the stroke of the lead screw and / or forward and reverse rotation of a motor and / or the rotating speed of the motor; a function switching unit, configured to switch three modes such as a rivet nut mode, a rivet mode and a screwdriver / drill mode; a switch unit, configured to trigger the gear transmission mechanism; and a circuit control unit, the circuit control unit being connected to the function switching unit, the adjustment unit, the switch unit, the motor, and the button switch. The multifunctional combined tool is simple and compact, and can be combined with a rivet nut kit, a rivet kit, and screwdriver / drill bits to form a multifunctional professional tool.

Description

A multi-functional combination tool

[0001] This application claims priority to Chinese Patent Application No. 202410493807.7, filed on April 23, 2024, entitled "A Multifunctional Combination Tool", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of machine tool technology, specifically to a multi-functional combination tool. Background Technology

[0003] Power tools are currently the most common and essential tools for freeing up manpower, including electric drills, electric wrenches, electric riveting tools, and electric nut rivet tools. Many work situations require drilling, riveting rivets, riveting nuts, and fixing screws, which necessitates the use of multiple tools in tandem. Because each tool has a single function, and core components are designed for specific functions without the possibility of replacing other functional parts, they lack versatility. Using multiple tools is inconvenient to carry, costly, especially difficult for outdoor and high-altitude operations, and also detrimental to environmental protection and energy conservation.

[0004] Because rivet guns only require linear motion to achieve riveting, they cannot be transformed into tools that require rotating to install rivet nuts and then using linear reciprocating motion to achieve riveting without special design. Fully automatic rivet nut tools, on the other hand, are specialized tools that require rotating to install the rivet nut and then using linear reciprocating motion to achieve riveting. Their switch settings are completely different from rivet guns and electric screwdrivers. Rivet nuts require a separate trigger switch to install them, followed by pulling the trigger (two actions) to complete the riveting. This requires increased rotational power and specific design changes (sacrificing performance, quick replacement, and avoiding side effects) to be used as a riveting tool. Current electric rivet nut tools typically only consider the need to change the gun head and pull the screw due to different rivet nut sizes, rather than allowing for easy replacement of the entire assembly. Screwdrivers, requiring rotational torque, require even more complex designs to become riveting tools. Technical issues

[0005] One of the objectives of this application is to provide a multi-functional combination tool to solve the technical problem of the limited functionality of power tools in the prior art. Technical solutions

[0006] The technical solution adopted in the embodiments of this application is:

[0007] Firstly, a multi-functional combination tool is provided, including a lead screw drive mechanism, a gear drive mechanism, and a push-button switch; the lead screw drive mechanism includes a lead screw, a nut gear, and a bearing housing; it also includes a rotary output gear, which is connected to and driven to rotate by the gear drive mechanism; an adjustment unit for adjusting the lead screw stroke and / or adjusting the forward and reverse rotation of the motor and / or the motor speed; a function switching unit for switching between three modes: rivet nut mode, rivet mode, and screwdriver / drill mode; a switch unit for triggering the gear drive mechanism; and a circuit control unit connected to the adjustment unit, the function switching unit, the switch unit, the motor, and the push-button switch. Beneficial effects

[0008] The beneficial effects of the multi-functional combination tool provided in this application are as follows: This multi-functional combination tool utilizes a combination of lead screw drive and gear drive, with the two drives being interconnected or independent. The linear reciprocating motion output of the lead screw drive, combined with a rivet structure, forms a rivet tool; the linear reciprocating motion output of the lead screw drive, combined with the rotary torque output of the gear drive, combined with a rivet nut structure, forms a rivet nut tool; the rotary torque output of the gear drive, combined with a torque mechanism, forms an electric screwdriver; and the rotary torque output characteristic, combined with a drill bit, forms an electric drill. The various interchangeable components are independent, easy to replace, and simple to combine, allowing drilling, riveting, rivetizing nuts, and installing screws to be completed with only one tool.

[0009] This application features pre-designed common components. In use, these components are assembled with rivet nut kits, rivet kits, and screwdriver bits to achieve their respective functions. One tool offers multiple functions, greatly expanding its application scenarios. It provides users with portability and convenience, reducing the space required for use and placement, significantly saving various costs, and is highly user-friendly and intelligent. It also adds the enjoyment of modular assembly during operation. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 is a cross-sectional view of Embodiment 1 of this application;

[0012] Figure 2 is a three-dimensional structural diagram of the rotary output gear in Embodiment 1 of this application;

[0013] Figure 3 is a perspective view of the connection between the transmission shaft, shaft gear, and pinion in Embodiment 1 of this application;

[0014] Figure 4 is a cross-sectional view of Embodiment 2 of this application;

[0015] Figure 5 is a cross-sectional view of Embodiment 3 of this application;

[0016] Figure 6 is a schematic diagram of the connection between the transmission shaft and the shaft gear in Embodiment 3 of this application;

[0017] Figure 7 is a cross-sectional schematic diagram of the rivet nut assembly of Embodiment 4 of this application;

[0018] Figure 8 is a schematic diagram of two cross sections of the rivet nut assembly in Embodiment 4 of this application;

[0019] Figure 9 is a three-dimensional structural schematic diagram of a portion of the rivet nut assembly in Embodiment 4 of this application;

[0020] Figure 10 is a three-dimensional sectional view of the assembled rivet nut assembly 1 and 2 according to Embodiment 4 of this application;

[0021] Figure 11 is a three-dimensional structural diagram of Embodiment 4 of this application assembled on Embodiment 1;

[0022] Figure 12 is a cross-sectional schematic diagram of Embodiment 4 of this application assembled on Embodiment 2;

[0023] Figure 13 is a cross-sectional schematic diagram of Embodiment 4 of this application assembled on Embodiment 3;

[0024] Figure 14 is a cross-sectional schematic diagram of the rivet assembly in Embodiment 5 of this application;

[0025] Figure 15 is a schematic diagram of two cross sections of the rivet assembly in Embodiment 5 of this application;

[0026] Figure 16 is a three-dimensional cross-sectional view of the assembled rivet components one and two of Embodiment 5 of this application;

[0027] Figure 17 is a three-dimensional structural diagram of Embodiment 5 of this application assembled on Embodiment 1;

[0028] Figure 18 is a cross-sectional view of Embodiment 5 of this application assembled on Embodiment 2;

[0029] Figure 19 is a cross-sectional schematic diagram of Embodiment 5 of this application assembled on Embodiment 3;

[0030] Figure 20 is a cross-sectional schematic diagram of the screw drill bit kit of Embodiment 6 of this application;

[0031] Figure 21 is a three-dimensional cross-sectional view of the assembled screw drill bit kit according to Embodiment 6 of this application;

[0032] Figure 22 is a three-dimensional structural diagram of Embodiment 6 of this application assembled on Embodiment 1;

[0033] Figure 23 is a cross-sectional schematic diagram of Embodiment 6 of this application assembled on Embodiment 2;

[0034] Figure 24 is a cross-sectional schematic diagram of Embodiment 6 of this application assembled on Embodiment 3; Embodiments of the present invention

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for descriptive convenience only, not indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0037] A multi-functional combination tool includes a lead screw drive mechanism, a gear drive mechanism, and a push-button switch; the lead screw drive mechanism is a conventional mechanism in motor tools, including a lead screw, nut, gear, bearing housing, etc., and this part is conventional technology; the applicant will not further explain the connection position relationship. This application also includes:

[0038] The rotary output gear is connected to and driven to rotate by the gear in the gear transmission mechanism. The rotary output gear is mainly used to drive the pull screw in the assembled rivet nut assembly to rotate clockwise and counterclockwise in rivet nut mode to install and remove the nut, and to drive the screwdriver to tighten or loosen the screw in screwdriver and drill mode.

[0039] The adjustment unit is used to adjust the lead screw travel and / or the forward and reverse rotation of the motor and / or the motor speed. The adjustment unit is operated via the "+" and "-" buttons on the circuit control unit. All adjustment parameters and data are pre-programmed and entered into the chip of the circuit control unit.

[0040] The function switching unit is used to switch between three modes: rivet nut mode, rivet mode, and screwdriver / drill mode. In rivet nut mode, the motor's power output is switched to a lead screw motion with pulling force combined with gear rotation torque output; in rivet mode, the motor's power output is switched to a lead screw's linear motion with pulling force output; and in screwdriver / drill mode, the motor's power output is switched to a rotary output with gear rotation torque output. The function switching unit is implemented via a function mode switching button on the circuit control unit. Similarly, the parameters and data for each mode are pre-programmed and entered into the chip of the circuit control unit.

[0041] The tool's default setting mode is rivet nut mode. After installing the two sets of rivet nut components on the tool body, pulling the trigger activates the tool and prompts the user to set the function mode. After confirming the rivet nut function, the user is prompted to set the riveting length. The "+" key on the LCD screen represents increasing the riveting length; a fast press represents 0.1mm, and a slow press represents 0.5mm. The "-" key works similarly. After setting, the rivet nut can be installed onto the threaded pull screw by triggering the pull screw to rotate it. Then, pull the trigger to start riveting the rivet nut. After the riveting is complete, release the trigger to finish riveting, and the pull screw will reverse to automatically release the riveted nut (or the riveted nut can be automatically released regardless of whether the trigger is released after riveting).

[0042] When you need to switch to riveting mode, install two sets of riveting components, pull the trigger to activate the tool, and you will be prompted to set the function mode. After setting the riveting mode, you will be prompted to start riveting. Insert the rivet into the nozzle, pull the trigger, and release the trigger until the riveting is finished. The tool motor will then reverse and the lead screw will reset (or the motor will automatically reset regardless of whether the trigger is released after the riveting is finished).

[0043] When switching to screwdriver / drill mode, install both screwdriver components, pull the trigger to activate the tool, and you will be prompted to set the function mode. After confirming the screwdriver / drill mode setting, you will be prompted to confirm that the nut gear and shaft gear are engaged, and to confirm the required rotation direction. After confirming both, pull the trigger to start working. If the user accidentally operates the screwdriver and shaft gears in an engaged state, the screwdriver bit will cycle between the front and rear Hall sensors in both forward and reverse directions. Once more than one forward and reverse rotation occurs, the tool will sound an alarm to confirm that the shaft gear needs to be disengaged from the nut gear.

[0044] In riveting mode, if a special rivet is encountered, the riveting length of the tool can be set according to the rivet length. For example, for a 10 mm rivet, the maximum riveting length can be set to 10 mm. This way, the screw will reset when the riveting is finished, saving the user operation time.

[0045] In screwdriver mode, when tightening or loosening small screws, after confirming the screwdriver / drill mode, press and hold the function switch button to adjust the speed and torque settings to reduce the required number of rotations per minute, so as not to damage the screws and related contacts. Conversely, you can increase the speed and torque for easier operation.

[0046] The aforementioned adjustment unit also includes a lead screw travel measuring unit, used to feed back the number of lead screw rotations to the circuit control unit. The lead screw travel measuring unit includes, but is not limited to, one or more combinations of magnetic ring encoders, photoelectric encoders, magnetoresistive sensors, Hall effect sensors, and force sensors. The adjustment unit can be mounted on, but is not limited to, the connecting part, the rotary output gear, the lead screw, or the nut gear.

[0047] A switching unit is used to trigger the rotation of the motor in the gear transmission mechanism. The switching unit includes a positioning block located at the rear end of the lead screw, and a spring block on the positioning block. A spring is installed between the spring block and the positioning block to ensure that the spring block and the positioning block are in contact. A touch switch is installed on the spring block. A magnet base with a magnet is installed at the upper end of the positioning block. Since the push-button switch can already start the motor, an additional switching unit (a touch switch is optimal; the switching unit includes but is not limited to a touch switch, and can also be operated by triggering a second time) is added to trigger the installation of the rivet nut separately.

[0048] The circuit control unit, connected to the adjustment unit, function switching unit, switching unit, motor, and push-button switches, can be a circuit control board with an LCD screen. The circuit control unit is equipped with sensors corresponding to the adjustment unit (actually a lead screw travel measuring unit) and the switching unit. The LCD screen displays the tool status, showing three modes: rivet, rivet nut, screwdriver, and electric drill. The circuit control unit has three buttons: "+" and "-" buttons control the travel (rivet nut and rivet modes) and forward / reverse rotation (screwdriver and electric drill modes); the other button is for switching function modes.

[0049] A connector, located at the end of the tool, with a hexagonal inner hole, is used to connect to the connecting shaft in an external rivet nut assembly, the top core in a rivet assembly, or the transmission connector in a screw drill bit kit.

[0050] The gear transmission mechanism of this application 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 and a slidable clutch shaft gear are provided on the transmission shaft; the shaft gear cooperates with the nut gear in the lead screw transmission mechanism; the pinion is connected to the rotary output gear.

[0051] This application also includes a housing that encloses and secures the components. As this is a standard configuration, no further explanation or illustration is provided.

[0052] After the motor decelerates, it drives the drive shaft to rotate. The drive shaft drives the shaft gear, and the gear on the shaft gear drives the nut gear. The nut gear drives the lead screw to move in a straight line to achieve rivet or rivet nut riveting. At the same time, the drive shaft can also drive the pinion gear to rotate. This pinion gear meshes with the rotary output gear, which in turn drives the pull screw in the rivet nut mode to rotate clockwise and counterclockwise to install and remove the nut, as well as to tighten or loosen screws with a screwdriver. Furthermore, when the front end of the shaft gear slides into the pinion gear, the shaft gear disengages from the gear on the nut of the lead screw. At this time, all power is transmitted to the rotary output gear outside the lead screw. When the gear on the shaft gear is engaged with the nut gear, the motor power is split. Most of the power is used to reciprocate the lead screw to achieve riveting or other needs (including but not limited to rivet and rivet nut riveting), and a small portion of the power is used to install the rivet nut on the pull screw and to loosen the riveted nut from the pull screw after riveting. In practical applications, the tightening and loosening forces for installing and loosening rivet nuts are relatively small, and the magnitude of these forces is the elastic force of the screw pressing against the wing washer. When a larger torque is required, the shaft gear disengages from the lead screw and nut gear, and all power is transmitted through the drive shaft and the external small gear to the rotating output gear to output torque in both forward and reverse rotation. At this time, both the lead screw and the nut gear are stationary.

[0053] To illustrate the technical solutions provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments.

[0054] Example 1

[0055] As shown in Figures 1, 2, and 3, the rotary output gear 4 in this embodiment is disposed in the lead screw drive mechanism. The lead screw drive mechanism includes a front bearing housing 1, a rear bearing housing 2, a lead screw 3, a nut gear 20, and a bearing. The rotary output gear 4 includes a main body 401 and a gear 402 disposed at one end of the main body 401. A through hole is provided in the middle of the main body 401, through which the front end of the lead screw 3 passes, and the rotary output gear 4 is not connected to the lead screw. A retaining tooth 404 is provided at the other end of the main body 401 for engaging and fixing with an external component. The rotary output gear 4 is disposed between the front bearing housing 1, the rear bearing housing 2, and the lead screw 3, maintaining axial fixation but allowing radial rotation. The gear 402 of the rotary output gear 4 passes through the rear bearing housing 2 and engages with the gear drive mechanism.

[0056] The switching unit in this embodiment includes a positioning block 5, which is located at the rear end of the lead screw 3. The positioning block 5 has two transmission shafts 6, and a spring block 7 slides on the two transmission shafts 6. A spring 8 is provided between the spring block 7 and the transmission shafts 6, so that the spring block 7 and the positioning block 5 are in contact. A normally closed contact switch 9 is provided on the spring block 7. A rotating sleeve is fitted into the inner hole of the spring block 7. The inner hole of the rotating sleeve is multi-grooved (hexagonal). A magnet seat 11 with a magnet is provided at the upper end of the positioning block 5. The magnet corresponds to the sensor of the circuit control unit at the upper end, and the signal is transmitted through current and fed back to the circuit control unit.

[0057] In this embodiment, the lead screw stroke measuring unit is a magnetic ring encoder 12, which is sleeved on the connector 13. The connector 13 and the lead screw 3 are located on the same axis. The connector 13 is axially fixed but can rotate radially; the inner hole 14 of the connector 13 near the spring block is hexagonal, and most of the other end is circular (or the entire inner hole can be hexagonal). The magnetic ring encoder 12 corresponds to the sensor 15 on the circuit control unit. The sensor 15 detects the number of rotations of the circular tube in real time and feeds it back to the circuit control unit.

[0058] The gear transmission device of this application includes 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 to the rear bearing seat 2. This part is conventional technology. The difference is that the transmission shaft of this application is provided with a shaft gear 19 that can slide axially and rotate radially. The shaft gear 19 cooperates with the nut gear 20 to drive the lead screw to perform reciprocating linear motion. A pinion 21 is provided on the end of the transmission shaft 18 away from the shaft gear 19. The pinion 21 extends out of the rear bearing seat and cooperates with the rotary output gear 4. When the shaft gear 19 is subjected to a sliding clutch, the shaft gear 19 disengages from the nut gear 20, and the front end of the shaft gear 19 connects with the pinion 21. The front end of the shaft gear is provided with a tooth 22, and the pinion is provided with several slots 23. The tooth 22 is inserted into the slots 23 and fixed. At this time, all power is transmitted to the rotary output gear 4 through the transmission shaft 18 and the external pinion 21 to provide forward and reverse rotational output torque. Additionally, a spline 24 is provided on the drive shaft, and keyways are provided at opposite positions inside the shaft gear. The two work together to achieve radial fixation and axial sliding.

[0059] Example 2

[0060] As shown in Figure 4, the main difference between this embodiment and embodiment 1 is that the rotary output gear is located at the other end of the transmission shaft.

[0061] As shown in the figure, the front drive shaft 25 of the power output device is equipped with a shaft gear 19, and the rear drive shaft 26 is equipped with a pinion 21. The rotating output gear 4, which meshes with the pinion 21, is fixed to the connector 13. The inner hole of the connector 13 is hexagonal, and a magnetic ring encoder is mounted on it. Other configurations are the same as in Embodiment 1.

[0062] Example 3

[0063] As shown in Figures 5 and 6, the main difference between this embodiment and embodiments 1 and 2 lies in the setting of the gear transmission mechanism and the rotary output gear.

[0064] The gear transmission mechanism includes a power output device, a transmission shaft 26, and a gear 19. The power output device includes a motor 16, an output shaft 27, a power gear 28, and a reduction gear 29. The power gear 28 is mounted on the output shaft 27 and is connected to the reduction gear 29, which is mounted on the transmission shaft 26. One end of the transmission shaft 26 has an inner groove 30, and one end of the gear 19 is fitted into the inner groove 30 and can slide. The gear 19 also has a limiting protrusion 31 to limit the sliding distance of the gear 19 in the inner groove 30. A rack 32 on the gear 19 is connected to a nut gear 20.

[0065] Example 4

[0066] As shown in Figure 7-13, when this application is used as a rivet nut tool, it needs to be equipped with a rivet nut kit. In its original state, this application is a rivet nut mode.

[0067] The rivet nut kit includes rivet nut assembly one and rivet nut assembly two. Rivet nut assembly one includes a connecting shaft 33, a guide connecting sleeve 34, a connecting nut 35, a rotating connecting shaft 36, a clutch retaining sleeve 37, and a pull screw 38. The guide connecting sleeve 34 is connected to the rotating output gear 4. The connecting nut 35 is located inside the guide connecting sleeve 34, with one end connected to the lead screw and the other end 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 engaged with the pull screw 38. The clutch retaining sleeve 34 is provided outside the pull screw 38 and the rotating connecting shaft 36, and a spring is provided between the clutch retaining sleeve 34 and the connecting nut 35.

[0068] The connecting shaft 33 passes through the lead screw and the rotating sleeve of the spring block, with one end connected to the rotating connecting shaft 36 and the other end inserted into the connector 13. The section of the connecting shaft 33 passing through the lead screw is cylindrical, forming a cylindrical connecting shaft 3301. From this section onwards, it becomes hexagonal, forming a hexagonal connecting shaft 3302. The hexagonal connecting shaft 3302 is connected to the spring block via the rotating sleeve, which is located inside the spring block 7 and has a hexagonal inner hole. The hexagonal connecting shaft 3302 is inserted into the connector, connecting with multiple grooves within the connector. It is radially fixed, axially sliding, and can drive the connector 13 to rotate radially. The diameter of the hexagonal connecting shaft 3302 is smaller than that of the cylindrical connecting shaft 3301, creating a step 3304 at the connection point. This step can push the spring block to trigger the tactile switch on the spring block.

[0069] As shown in Figure 9, a raised shaft 39 is provided on the outer circle of the rotary connecting shaft 36, and guide grooves 40 are provided on the outer circles of the guide connecting sleeve 34 and the clutch fixing sleeve 37. The raised shaft 39 extends out of the guide groove of the clutch fixing sleeve 37 and extends into the guide groove of the guide connecting sleeve 34. The rotary output gear 4 drives the guide connecting sleeve 34 to rotate, and the guide groove of the guide connecting sleeve 34 drives the raised shaft 39 of the rotary connecting shaft 36, which in turn drives the rotary connecting shaft 36. The transmission hexagonal shaft on the rotary connecting shaft 36 drives the connecting piece 13 at the tail. The connecting piece 13 and the circuit control board sense and calculate the number of rotations and the stroke. At the same time, the rotary connecting shaft 36 drives the pull screw to rotate and install and loosen the rivet nut.

[0070] The second rivet nut assembly includes an outer sleeve 41, an adjusting nut 42, and a nozzle 43, which is a conventional technique. During assembly, the connecting shaft is inserted into the lead screw hole, passing through the multi-groove inner hole of the spring block, and reaching the inner hole of the connector. The guide connecting sleeve is pushed towards the front end of the tool. At this time, the exposed connecting nut is screwed internally onto the external thread at the front of the lead screw. The guide connecting sleeve is then passed through the inner hole of the front bearing seat, and the retaining teeth of the guide connecting sleeve and the retaining teeth of the rotating output gear are engaged and fixed, ensuring they fit together. The second rivet nut assembly is then installed, and the fixing nut 44 is tightened. At this point, the axial direction of the guide connecting sleeve is limited. After the two components are installed, a rivet nut tool is formed.

[0071] In its original state, this application operates in rivet nut mode. During operation, when the pull screw is activated, the hexagonal connecting shaft moves backward, pushing the spring block slightly towards the rear of the tool. This causes the normally closed switch above the spring block to open and return to its normally closed state. The motor then rotates to install the nut. Once the nut is in place, the pull screw experiences back pressure, causing the normally closed switch to open and the motor to stop. Pulling the tool trigger switch again initiates riveting. At this point, the screw and nut generate significant riveting pressure, causing the torque-limited pinion to slip. The screw drives the rivet nut on the pull screw to continue moving backward until riveting is complete. Releasing the trigger switch returns the screw to its original position, releasing the pressure on the output gear, allowing it to rotate freely and restoring power. Reversing the rotation releases the rivet nut, ending the riveting operation.

[0072] In this embodiment, the stroke can be adjusted according to the riveting effect using the "+" and "-" buttons on the circuit control board. The LCD screen circuit control board chip is set to the nut riveting mode by default; simply pulling the trigger will not allow the tool to operate normally unless the return block is pushed first to energize the tactile switch. Otherwise, repeatedly pulling the trigger will trigger an alarm prompting a mode switch.

[0073] Example 5

[0074] As shown in Figures 14-19, when this application is used as a riveting tool, a riveting kit needs to be assembled. The riveting kit includes riveting component one and riveting component two.

[0075] The rivet assembly includes a spring sleeve 45, a clamping sleeve 46, a top core 47, a top core spring 48, and a three-jaw 49. One end of the spring sleeve 45 is connected to the lead screw, and the other end is connected to one end of the clamping sleeve 46. The three-jaw 49 is positioned between the clamping sleeve 46 and the spring sleeve 45. The top core 47 passes through the spring block, the lead screw, the spring sleeve, and the clamping sleeve, with one end pressing against the three-jaw 49 and the other end inserted into the connector 13. The top core 47 can slide axially within the connector 13, but cannot drive the connector to rotate.

[0076] The three jaws, when combined and threadedly fixed to the clamping sleeve and spring sleeve, form a single, easy-to-carry and install assembly. Because the top core tube has a smooth outer diameter, when it passes through the inner hole of the lead screw, the inner hole of the spring block, and directly into the connector, the smooth outer wall of the top core tube cannot provide the force to activate the switch on the spring block, nor can it drive the connector. At this point, the inner hole of the connector becomes the discharge connection channel for the scrap nail rod. The riveted scrap nail rod passes through the inner hole of the magnetic ring encoder and flows into the tool scrap nail rod collection cylinder.

[0077] The second rivet assembly includes an outer sleeve 50, a nozzle 51, and a fixing cap 52, using conventional technology. During assembly, the top core 47 is passed through the inner hole of the lead screw 3, then through the inner hole of the spring block 7, and then inserted into the inner hole of the connector 13. The inner thread of the spring sleeve 45 is tightened to the outer thread of the lead screw 3. The second rivet mechanism is then installed, and the fixing cap 52 on the outside of the outer sleeve 50 is tightened, thus forming a rivet tool.

[0078] The long top core tube has no stepped protrusion, so it cannot trigger the light touch switch on the spring block. When the trigger is pulled twice or more in succession, the tool will switch the alarm prompt function to riveting mode and pull the trigger switch to achieve riveting. During the entire riveting process, since there is no connecting part at the front end of the rotary output gear, the rotary output gear and the pinion are in a free rotation state or slipping state.

[0079] When the riveting mode is activated, press the function button. After the LCD screen displays the riveting function, riveting can begin. The power of the rotating output gear will stop. The motor power is mainly used for riveting the rivets. At this time, the adjustment unit can adjust the riveting stroke according to different rivet requirements. The subsequent process is the normal riveting process, which will not be described further.

[0080] Example 6

[0081] As shown in Figures 20-24, when this application is used as a screwdriver and electric drill tool, it needs to be equipped with a screwdriver bit kit.

[0082] The screwdriver bit kit includes a power connection sleeve 53, an outer fixed screw cap 54, a transmission connector 55, and a screwdriver bit or drill bit 56. One end of the power connection sleeve 53 is connected to the transmission connector 55, and the other end is fitted with the screwdriver bit or drill bit 56. The transmission connector 55 is connected to the connector 13. The power connection sleeve 53 is connected and fixed by a retaining tooth provided at one end engaging with the retaining tooth of the rotating output gear 4.

[0083] During assembly, pass the transmission connector through the inner hole of the lead screw, then through the inner hole of the spring block, and then insert it into the inner hole of the connector. Engage the power connector sleeve with the rotating output gear through the inner hole of the front bearing housing. Screw on the outer fixing cap to axially fix the power connector sleeve. Then insert the wrench (or drill bit) into the inner hole of the power connector sleeve. This creates a torque screwdriver or electric drill (the shaft gear and pinion need to be manually driven to connect). However, the transmission connector cannot drive the connector.

[0084] If there is no object passing through the lead screw hole, the tool cannot be set to rivet nut mode or rivet mode (this design is not a claim point and will not be described in detail). The tool must be set to screwdriver and drill mode to start the motor (at this time, the LCD screen will prompt you to engage the shaft gear and pinion). For example, a Hall coil can be set. If there is no engagement, the tool will rotate clockwise from the initial Hall position and reverse to reset at the second Hall position. The tool will cycle between the two sensors on the LCD screen in both clockwise and counterclockwise directions. If the tool continues to rotate clockwise and counterclockwise, the LCD circuit board will alarm and prompt you to engage the shaft gear and pinion.

[0085] Move the shaft gear forward on the drive shaft to activate the screwdriver and drill mode. The lead screw and nut gear will not receive torque output and will remain stationary. The tool power will output all torque to the rotating output gear, which will then be transmitted to the power coupling sleeve to tighten or loosen screws or drill holes. The "+" and "-" buttons switch the motor's forward and reverse rotation. At this time, the function switching unit can adjust the forward and reverse speeds according to different requirements (after the button switching key displays the correct rotation direction, continue to switch the speed function to switch to the desired speed).

[0086] The core of this patent application is a motor driving a lead screw in linear reciprocating motion to complete riveting. Simultaneously, the motor drives a gear reducer to provide torque output and rotational torque. With simple configuration, it can be quickly and easily combined with one or two other mechanisms to form different types of tools. In the process of assembling this tool, a hexagonal connecting shaft pushes a spring block switch to solve the problem of nut installation and switching for rivet nuts. The structure is simple and easy to disassemble and replace. It adds logic for several tools, including function and parameter switching, a magnetic ring encoder, and an LCD circuit board, achieving beneficial results. In these embodiments, a hexagonal connecting shaft with a boss (the boss can trigger a tactile switch) and other mechanisms are installed in the inner hole of the lead screw to form a nut riveting tool; replacing it with a hollow, smooth, stepless top core tube (used for waste nail rod discharge tubes) and other mechanisms forms a rivet tool; and installing a torque bit, etc., transforms it into an electric screwdriver.

[0087] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A multi-functional combination tool, comprising a lead screw drive mechanism, a gear drive mechanism, and a push-button switch; the lead screw drive mechanism comprises a lead screw, a nut gear, and a bearing housing; characterized in that: It also includes, A rotary output gear, which is connected to and driven to rotate by a gear transmission mechanism; Adjustment unit, used for adjusting the lead screw stroke and / or the forward and reverse rotation of the motor and / or the motor speed; The function switching unit is used to switch between three modes: rivet nut mode, rivet mode, and screwdriver / electric drill mode. The switching unit triggers the gear transmission mechanism; The circuit control unit is connected to the adjustment unit, function switching unit, switch unit, motor and push-button switch.

2. The multi-functional combination tool according to claim 1, characterized in that, The rivet nut mode described is a switch from motor power output to lead screw motion pulling force output combined with gear rotation torque output; The riveting mode is a switch from motor power output to linear motion and tension output of a lead screw; The screwdriver drill mode is a switch from motor power output to rotary output gear rotation torque output.

3. A multi-functional combination tool according to claim 1, characterized in that, The switch unit includes a positioning block disposed at the rear end of the lead screw, and a spring block disposed on the positioning block; a spring is disposed between the spring block and the positioning block so that the spring block and the positioning block are in contact; a touch switch is disposed on the spring block; and a magnet base with a magnet is disposed at the upper end of the positioning block.

4. A multi-functional combination tool according to claim 1, characterized in that, The circuit control unit is equipped with sensors corresponding to the adjustment unit and the switching unit.

5. A multi-functional combination tool according to claim 1, characterized in that, The adjustment unit further includes a lead screw stroke measuring unit, which includes, but is not limited to, one or more combinations of magnetic ring encoders, photoelectric encoders, magnetoresistive sensors, Hall sensors, and tension sensors.

6. A multi-functional combination tool according to claim 1, characterized in that, It also includes connectors for connecting external rivet nut assemblies, rivet assemblies, or screwdriver bit kits.

7. A multi-functional combination tool according to any one of claims 1-6, characterized in that, The gear transmission mechanism includes a power output device, a transmission shaft, and a shaft gear; The drive shaft is connected to the power output device, and a pinion and a slidable clutch gear are provided on the drive shaft; The shaft gear engages with the nut gear in the lead screw transmission mechanism; the pinion gear engages with the rotary output gear.

8. A multi-functional combination tool according to claim 7, characterized in that, The rotary output gear is located in the lead screw transmission mechanism.

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

10. A multi-functional combination tool according to claim 9, characterized in that, The rotary output gear is fixedly connected to the connecting piece, and the rotary output gear drives the connecting piece to rotate.

11. A multi-functional combination tool according to claim 10, characterized in that, The power output device has a shaft gear at one end of the drive shaft near the lead screw and a pinion at the other end.

12. A multi-functional combination tool according to claim 10, characterized in that, The power output device includes a motor, an output shaft, a power gear, and a reduction gear; the power gear and the reduction gear are connected in a cooperating manner, and the reduction gear is located on the transmission shaft.

13. A multi-functional combination tool according to any one of claims 7-10, characterized in that, It also includes rivet nut assembly one; The rivet nut assembly includes a connecting shaft, a guide connecting sleeve, a connecting nut, a rotating connecting shaft, a clutch fixing sleeve, and a pull screw; The guide connecting sleeve is connected to the rotary output gear; the connecting nut is set inside the guide connecting sleeve, one end of which is connected to the lead screw, and the other end of which is connected to one end of the rotary connecting shaft; the other end of the rotary connecting shaft is connected to the pulling screw; a clutch fixing sleeve is set outside the pulling screw and the rotary connecting shaft, and a spring is set between the clutch fixing sleeve and the connecting nut; The connecting shaft passes through the lead screw, with one end connected to a rotating connecting shaft and the other end inserted into a connector; the connecting shaft is radially fixed within the connector, axially sliding, and can drive the connector to rotate; The outer circle of the rotary connecting shaft is provided with a protruding shaft, and the outer circles of the guide connecting sleeve and the clutch fixing sleeve are provided with guide grooves; The protruding shaft extends out of the guide groove of the clutch fixing sleeve and into the guide groove of the guide connecting sleeve.

14. A multi-functional combination tool according to claim 12, characterized in that, It also includes a second rivet nut assembly, which includes an outer sleeve, an adjusting nut, and a nozzle; the second rivet nut assembly is fixed on the front bearing seat and is disposed outside the first rivet nut assembly.

15. A multi-functional combination tool according to any one of claims 7-10, characterized in that, It also includes a rivet assembly one; the rivet assembly one includes a spring sleeve, a clamping sleeve, a top core, a top core spring, and a three-jaw jack; One end of the spring sleeve is connected to the lead screw, and the other end is connected to one end of the clamping sleeve; the three jaws are positioned between the clamping sleeve and the spring sleeve; the top core passes through the lead screw, the spring sleeve, and the clamping sleeve, with one end pressing against the three jaws and the other end inserted into the connector; the top core can slide axially within the connector but cannot drive the connector to rotate.

16. A multi-functional combination tool according to claim 14, characterized in that, It also includes a second rivet assembly, which includes an outer sleeve, a nozzle, and a fixing cap; the second rivet assembly is fixed on the front bearing seat and is disposed outside the first rivet assembly.

17. A multi-functional combination tool according to any one of claims 7-10, characterized in that, It also includes a screwdriver bit kit; The screwdriver bit kit includes a power connection sleeve, an external fixed screw cap, a transmission connector, and a screwdriver bit or drill bit; one end of the power connection sleeve is connected to the transmission connector, and the other end is fitted with the screwdriver bit or drill bit; the transmission connector is connected to the connector. The power connection sleeve is installed inside the outer fixing cap.

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