Electric torque wrench

Abstract

The invention discloses an electric torque wrench, and relates to the technical field of mechanical part assembling tools. The motor of the control unit is connected with the driving gear, so that the motor can drive the driving gear to rotate and finally drive the functional gear to rotate, the buckle is installed on the functional opening in the functional gear, and quick installation of the thread accessory is achieved. The axis of the control unit is perpendicular to the plane where the functional unit is located, so that the effect of radially screwing thread accessories can be achieved, and the installation space is saved. In the installation process, the motor drives the whole functional unit to rotate in the horizontal direction with the motor as the circle center, and after installation is completed, the gear set is reset by arranging the reset assembly. The pushing piece pushes the reset piece to make contact with the indicating boss, the indicating boss moves in the reset through hole and synchronously drives the driving gear to rotate, and then the functional gear is driven to reset. By means of the structure, the threaded accessory can be installed in the radial direction, the installation process is simple, and the installation applicability of the threaded accessory is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical parts assembly tools, and in particular to an electric torque wrench. Background Art

[0002] We cannot live without tools such as pliers, wrenches and screwdrivers, and the emergence of power tools has greatly improved the convenience of life and work. Power tools can not only improve efficiency, but also achieve different locking forces by adjusting torque, and through standardized and replaceable bits, the application range of power tools is wider. At present, the most commonly used power tools on the market are electric screwdrivers. This tool can adapt to screws of different shapes and sizes by replacing the bit. When facing some square head, hexagon head and other screws, there are also corresponding socket-type bits that can be adapted for use.

[0003] However, existing electric screwdrivers can only operate in the axial direction of the fastener, which means that to unscrew a screw, sufficient operating space must be left directly above the screw. Although this type of problem can be avoided by reserving sufficient operating space when designing the product; however, when repairing some old and outdated equipment, or other products with unreasonable designs, there is still a situation where the operating space is limited and the electric screwdriver cannot be used. When this unavoidable situation occurs, it can only be operated radially with a manual wrench. In addition, the structure of the sleeve nut is a structure in which a tubular part passes through the nut in the axial direction. Due to the particularity of its design, electric tools cannot be adapted, and the nut can only be turned radially with a manual wrench. Therefore, designing an electric tool that can operate in the radial direction can further improve the installation efficiency of threaded accessories.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide an electric torque wrench, which can be operated to install threaded accessories in the radial direction, thereby improving the installation efficiency of the threaded accessories.

[0006] The present invention is achieved in that:

[0007] In a first aspect, the present invention provides an electric torque wrench, including a shell, wherein a cavity is formed inside the shell, and a functional unit and a control unit are provided in the cavity, wherein an axis of the control unit is perpendicular to a plane where the functional unit is located.

[0008] The functional unit includes a functional component and a reset component.

[0009] The functional component includes a first positioning plate, a second positioning plate and a gear set. The gear set is located between the first positioning plate and the second positioning plate and is spaced apart from the plate surfaces of the first positioning plate and the second positioning plate. The first positioning plate and the second positioning plate are matched and fixed.

[0010] The gear set includes a driving gear, an auxiliary gear and a functional gear. There are at least two auxiliary gears, and each auxiliary gear is meshed with the driving gear and the functional gear so that the driving gear drives the functional gear to rotate; a functional opening is provided on the gear surface of the functional gear, and the functional opening is configured as a mounting clip.

[0011] The reset assembly includes a reset member, a pushing member and an elastic member. The reset member includes a guide portion and a pushing portion. After being guided by the guide portion, the pushing member is connected to the pushing portion. The elastic member is sleeved on the pushing member and is limited between the pushing portion and the limiting portion by a limiting portion provided on the pushing member. One end of the pushing member away from the reset member extends out of the outer shell.

[0012] An indicating boss is arranged on the driving gear, and a reset through hole penetrating the upper and lower surfaces of the first positioning plate is opened corresponding to the indicating boss, and the indicating boss passes through the reset through hole. The control unit includes a motor, and the indicating boss and the reset through hole form a cam mechanism. The reset member is arranged on the surface of the first positioning plate and can selectively contact the indicating boss.

[0013] In an optional embodiment, a convex hole is provided on the indicating boss, and the motor is connected to the indicating boss via the convex hole and is configured to drive the indicating boss to rotate.

[0014] The indicating boss is in a water drop shape, the resetting through hole is circular, and the pushing portion of the resetting member pushes the indicating boss to rotate in the resetting through hole.

[0015] Preferably, an arc-shaped protrusion is provided at one end of the pushing portion away from the guiding portion.

[0016] Preferably, an indication mark is further provided on the indication boss, and the indication direction of the indication mark is the same as the direction of the functional opening.

[0017] In an optional embodiment, a card slot is provided on the functional opening of the functional gear, and a flange is provided on the clip, and the flange is installed in the card slot so that the clip is installed at the functional opening.

[0018] Preferably, the flange is arranged on the first end surface of the buckle, and the first end surface is a surface perpendicular to the working contact surface of the buckle; and the card slot is arranged in the opening surface of the functional opening.

[0019] Preferably, the card slot is arranged at the midline of the opening surface of the functional opening.

[0020] Preferably, mounting grooves are provided on both sides of the card slot, and mounting bosses corresponding to the functional openings are provided on the first positioning plate and the second positioning plate, and the mounting bosses are fixed with the mounting grooves to fix the first positioning plate, the second positioning plate and the functional gear.

[0021] In an optional embodiment, the control unit also includes an accessory box assembly, which includes a box-shaped accessory box body and a plurality of replaceable fasteners, each replaceable fastener is provided with a flange, and the inner wall surface of the accessory box body is provided with a plurality of positioning grooves, and each flange is installed in a positioning groove.

[0022] Preferably, a plurality of positioning grooves are arranged at intervals along the axis of the control unit.

[0023] In an optional embodiment, the shell includes a first shell, a second shell and a third shell, the first shell covers the upper surface of the functional unit, the second shell and the third shell cover the outer surface of the control unit, extend to the lower surface of the functional unit, and are fixedly connected to the first shell.

[0024] Preferably, the second shell and the third shell are both provided with limiting grooves, the outer wall surface of the accessory box body is provided with limiting protrusions, and the limiting grooves cooperate with the limiting protrusions to fix the accessory box assembly in the cavity formed by the shells.

[0025] Preferably, a first opening groove is arranged on the end surface of the second shell and / or the third shell away from the first shell, and the limiting groove and the limiting protrusion are both arranged on a side close to the first opening groove.

[0026] Preferably, the second shell and the third shell are connected to the first shell by bolts and / or screws, and the first positioning plate and the second positioning plate are also provided with mounting holes, and the bolts and / or screws pass through the mounting holes to connect the second shell and the third shell to the first shell.

[0027] In an optional embodiment, a second opening groove is further provided on the first positioning plate, and the second opening groove is provided corresponding to the pushing member. The pushing member is located at the second opening groove, and a mounting portion protruding along a direction away from the gear set is provided at one end of the second opening groove close to the functional opening. A through hole is provided on the mounting portion, and the pushing member passes through the through hole to be connected with the pushing portion of the reset member.

[0028] Preferably, the guide portion of the reset member is two guide posts, which are respectively located on both sides of the second opening groove.

[0029] In an optional embodiment, positioning pieces are further provided on the first positioning plate and / or the second positioning plate, the number of the positioning pieces is the same as the number of the auxiliary gears, and each auxiliary gear is positioned through a positioning piece.

[0030] In an optional embodiment, a support platform protruding toward the gear set is provided on the second positioning plate, the interior of the support platform is a hollow channel, the motor is connected to the indicating boss through the channel inside the support platform, and the support platform is in contact with the driving gear so that the second positioning plate is spaced apart from the gear set.

[0031] In an optional embodiment, the control unit further includes a control module and a battery, the motor, the control module and the battery are all located at one end close to the functional unit, and the accessory box assembly is located at an end away from the functional unit.

[0032] The battery and the motor are arranged in parallel, the battery is configured to supply power to the motor, and a control module protruding from the shell is arranged on one side corresponding to the motor, and the control module is configured to control the working state of the motor.

[0033] In an optional embodiment, the control module includes a charging port, a forward button, a reverse button, and a torque adjustment button.

[0034] The present invention has the following beneficial effects:

[0035] The present invention provides an electric torque wrench. By connecting the motor of the control unit with the driving gear, the motor can drive the driving gear to rotate. The driving gear transmits power to the auxiliary gear, and the auxiliary gear drives the functional gear to rotate. A buckle is installed on the functional opening of the functional gear. The buckle cooperates with the threaded accessory to achieve the rapid installation of the threaded accessory. Since the axis of the control unit is perpendicular to the plane where the functional unit is located, when the control unit extends in the vertical direction, for example, when the operator holds it normally, the functional unit is located in the horizontal plane, and the effect of radially screwing the threaded accessory can be achieved. During the installation process, the motor drives the functional unit as a whole to rotate in the horizontal direction with the motor as the center of the circle. Therefore, in order to smoothly carry out each installation process, the gear set is reset by setting a reset component. The pusher pushes the reset member to contact the indicating boss, and pushes the indicating boss to move in the reset through hole. The indicating boss is located on the driving gear, so it can synchronously drive the driving gear to rotate, and then drive the functional gear to reset. The structure can realize the radial installation of the threaded accessory, and the installation process is simple, which improves the installation applicability of the threaded accessory. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic structural diagram of an electric torque wrench provided in a first embodiment of the present invention;

[0038] Figure 2 An exploded view of the structure of the electric torque wrench provided by the first embodiment of the present invention;

[0039] Figure 3An exploded view of the structure of the functional components provided in the first embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the structure of the motor and the functional unit provided in the first embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the structure of a functional unit provided in the first embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the process of the reset member pushing and resetting provided by the first embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the process of the reset member pushing and resetting provided by the first embodiment of the present invention;

[0044] Figure 8 A schematic structural diagram of a buckle installation method provided in the first embodiment of the present invention;

[0045] Fig. 9 A structural diagram of a housing and an accessory box assembly provided in a first embodiment of the present invention;

[0046] Fig.10 An exploded view of the structure of the accessory box assembly provided in the first embodiment of the present invention;

[0047] Fig.11 A schematic diagram of the rotation process of a gear set provided in the first embodiment of the present invention;

[0048] Fig.12 A schematic diagram of the rotation process of the gear set provided in the first embodiment of the present invention.

[0049] Main component symbol description: 10-electric torque wrench; 100-housing; 110-first housing; 120-second housing; 130-third housing; 200-functional unit; 210-first positioning plate; 211-reset through hole; 212-second opening groove; 213-mounting part; 2131-through hole; 220-second positioning plate; 221-support platform; 222-channel; 230-gear set; 231-driving gear; 2311-indicating boss; 2312-convex hole; 2313-indicating mark; 232-auxiliary gear; 233-functional gear; 2331-functional opening; 2332-slot; 2333-mounting groove; 240-reset member; 241-guide part; 242-pushing part ;2421-arc-shaped protrusion;250-pushing member;251-limiting part;260-elastic member;271-mounting boss;272-limiting groove;273-first opening groove;274-positioning member;275-mounting hole;281-screw;282-hexagonal bolt;300-control unit;310-motor;311-motor shaft;312-key;313-keyway;320-accessory box assembly;321-accessory box body;3211-positioning groove;3212-limiting protrusion;330-control module;331-charging port;332-forward button;333-reverse button;334-torque adjustment button;340-battery;410-fastener;420-replaceable fastener;430-flange. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0055] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] First embodiment

[0057] Please refer to Figure 1 and Figure 2 The present embodiment provides an electric torque wrench 10, including a housing 100, wherein a cavity is formed inside the housing 100, and a functional unit 200 and a control unit 300 are disposed in the cavity, wherein the axis of the control unit 300 is perpendicular to the plane where the functional unit 200 is located.

[0058] For example, if the plane where the functional unit 200 is located is a horizontal plane, the control unit 300 is arranged in a vertical direction, and the electric torque wrench 10 is in an overall L-shaped shape. Therefore, when the electric torque wrench 10 is in a working state, the functional unit 200 fits the threaded fitting to be screwed, and the operator can install the threaded fitting by holding the housing 100 on the surface of the control unit 300.

[0059] The functional unit 200 includes a functional component and a reset component. The functional component is used to implement the installation and removal process of the threaded accessories, and the reset component is used to reset the functional component.

[0060] Please refer to Figure 3The functional components include a first positioning plate 210, a second positioning plate 220 and a gear set 230. The gear set 230 is located between the first positioning plate 210 and the second positioning plate 220, and is spaced apart from the plate surfaces of the first positioning plate 210 and the second positioning plate 220 so that the gears of the gear set 230 can rotate smoothly and avoid friction between the gear set 230 and the first positioning plate 210 and the second positioning plate 220; the first positioning plate 210 and the second positioning plate 220 are matched and fixed to position and protect the gear set 230.

[0061] The gear set 230 includes a driving gear 231, an auxiliary gear 232 and a functional gear 233. There are at least two auxiliary gears 232. In the present embodiment, there are two auxiliary gears 232. Each auxiliary gear 232 is meshed with the driving gear 231 and the functional gear 233. The two auxiliary gears 232 are symmetrically spaced so that the driving gear 231 drives the auxiliary gear 232 to rotate, and the auxiliary gear 232 drives the functional gear 233 to rotate.

[0062] Since the driving gear 231 and the functional gear 233 are transmitted in two stages, the driving gear 231 and the functional gear 233 rotate in the same direction.

[0063] The gear surface of the functional gear 233 is provided with a functional opening 2331, and the functional opening 2331 is configured to install the clip 410. Figure 3 As shown, the function opening 2331 is recessed toward the center of the function gear 233 , and the buckle 410 is installed in cooperation with the side surface of the function opening 2331 , so that the buckle 410 is located in the function opening 2331 after installation.

[0064] Please refer to Figure 4 and Figure 5 The reset assembly includes a reset member 240, a pushing member 250 and an elastic member 260. The reset member 240 includes a guide portion 241 and a pushing portion 242. The pushing member 250 is connected to the pushing portion 242 after being guided by the guide portion 241. The elastic member 260 is sleeved on the pushing member 250 and is limited between the pushing portion 242 and the limiting portion 251 by a limiting portion 251 provided on the pushing member 250. One end of the pushing member 250 away from the reset member 240 extends out of the housing 100.

[0065] Since one end of the pushing member 250 away from the reset member 240 extends out of the housing 100, and the pushing member 250 is connected to the pushing portion 242 of the reset member 240, when the pushing member 250 is pushed, the reset member 240 will also rotate synchronously. When the force pushing the pushing member 250 disappears, the pushing member 250 and the reset member 240 can be reset due to the setting of the elastic member 260.

[0066] Please refer to Figure 4 and Figure 5 An indicating boss 2311 is provided on the driving gear 231, and a reset through hole 211 penetrating the upper and lower surfaces of the first positioning plate 210 is opened corresponding to the indicating boss 2311, and the indicating boss 2311 passes through the reset through hole 211. The control unit 300 includes a motor 310, and the indicating boss 2311, the reset through hole 211 and the motor 310 form a cam mechanism. The reset member 240 is provided on the surface of the first positioning plate 210 and can selectively contact the indicating boss 2311.

[0067] In this embodiment, the guide portion 241 of the reset member 240 is two guide posts, and the push member 250 is located in a groove formed between the two guide posts to control the movement direction of the push member 250 .

[0068] Please refer to Figure 5 A second opening groove 212 is also provided on the first positioning plate 210, and the second opening groove 212 is provided corresponding to the pushing member 250. The pushing member 250 is located at the second opening groove 212, which facilitates the rapid pushing of the pushing member 250 and prevents friction between the pushing member 250 and the first positioning plate 210.

[0069] The second opening slot 212 is provided with a mounting portion 213 protruding in a direction away from the gear set 230 at one end thereof close to the functional opening 2331. The pushing portion 242 and the guiding portion 241 of the reset member 240 are respectively located on both sides of the mounting portion 213. Two guiding posts extend in a direction away from the mounting portion 213 along both sides of the second opening slot 212 of the mounting portion 213. The mounting portion 213 is provided with a through hole 2131, and the pushing member 250 passes through the through hole 2131 and is connected to the pushing portion 242 of the reset member 240.

[0070] In this embodiment, the pushing member 250 is threadedly connected to the pushing portion 242 of the restoring member 240 .

[0071] Please refer to Figure 2 In this embodiment, the motor 310 includes a motor body 310 and a motor shaft 311. A key 312 and a key slot 313 are provided at one end of the motor shaft 311 away from the motor body 310. The driving gear 231 and the motor 310 are connected by the indicating boss 2311 and the key 312 and the key slot 313. When the motor 310 is working, the kinetic energy is transferred to the indicating boss 2311 through the key 312 and the key slot 313. Since the indicating boss 2311 and the reset through hole 211 form a cam mechanism, the motor 310 drives the indicating boss 2311 to rotate in the area within the reset through hole 211, so that the driving gear 231 can rotate around the motor shaft 311.

[0072] When resetting is required, since the resetting member 240 is arranged on the surface of the first positioning plate 210 and can selectively contact the indicating boss 2311, when the pushing member 250 is pushed, the resetting member 240 rotates synchronously until it contacts the indicating boss 2311; then the pushing member 250 is further pushed to make the indicating boss 2311 rotate in the area where the resetting through hole 211 is located, the rotation of the indicating boss 2311 drives the active gear 231 to rotate, the active gear 231 drives the auxiliary gear 232 to rotate, and the auxiliary gear 232 drives the functional gear 233 to rotate, and finally the functional gear 233 is reset.

[0073] In this structure, since the functional unit 200 is only provided with a gear set 230, a first positioning plate 210 and a second positioning plate 220, and the functional opening 2331 on the functional gear 233 in the gear set 230 cooperates with the fastener 410 to realize the installation of the threaded accessories, the overall height of the functional unit 200 is relatively small. At the same time, the control unit 300 is located in a direction perpendicular to the plane where the functional unit 200 is located. Therefore, when installing the threaded accessories, there is no need to reserve the installation operation space in advance, and the threaded accessories can be installed in a variety of situations.

[0074] Please refer to Figure 3 In this embodiment, a support platform 221 protruding toward the gear set 230 is provided on the second positioning plate 220, and the interior of the support platform 221 is a hollow channel 222. The key 312 and the keyway 313 of the motor 310 are connected to the indicating boss 2311 of the driving gear 231 through the channel 222 inside the support platform 221. The support platform 221 contacts the driving gear 231, so that the second positioning plate 220 and the gear set 230 are spaced apart to ensure that the driving gear 231 can rotate stably.

[0075] Please refer to Figure 6 and Figure 7 In this embodiment, in order to facilitate the installation of the key 312 and the keyway 313 on the motor shaft 311, a convex hole 2312 is provided on the indicating boss 2311, and the motor 310 is connected to the indicating boss 2311 through the convex hole 2312 and is configured to drive the indicating boss 2311 to rotate.

[0076] In this embodiment, in order to ensure the accuracy of the reset, the indicating boss 2311 is in a teardrop shape, the reset through hole 211 is circular, and the pusher 242 of the reset member 240 pushes the indicating boss 2311 to rotate in the reset through hole 211. By setting the teardrop-shaped indicating boss 2311, the tip of the teardrop shape can be used to indicate the direction, and the bottom arc surface of the teardrop shape facilitates the pushing of the reset member 240. In addition, the above-mentioned shape design of the indicating boss 2311 and the reset through hole 211 can also enable the pusher 250 to be directly pushed to the bottom to realize the reset of the functional gear 233, and the reset process is convenient and quick.

[0077] In this embodiment, in order to facilitate pushing the indicating boss 2311 and prevent the indicating boss 2311 from getting stuck and unable to be pushed during the pushing process, an arc-shaped protrusion 2421 is provided at the end of the pushing portion 242 away from the guide portion 241. The protrusion angle of the arc-shaped protrusion 2421 cooperates with the shape of the indicating boss 2311, so as to guide the rotation process of the indicating boss 2311 in the reset through hole 211.

[0078] In this embodiment, the transmission ratio of the driving gear 231 to the functional gear 233 is 1:1. In other embodiments, the transmission ratio of the functional gear 233 may also be an integer multiple of the transmission ratio of the driving gear 231 .

[0079] In this embodiment, since the driving gear 231 and the functional gear 233 have the same rotation direction, when the transmission ratio of the driving gear 231 and the functional gear 233 is 1:1, the rotation process of the driving gear 231 and the functional gear 233 is completely consistent. In order to facilitate the indication of the position of the functional opening 2331 on the functional gear 233, an indication mark 2313 is further provided on the indication boss 2311 of the driving gear 231. The indication direction of the indication mark 2313 is the same as the direction of the functional opening 2331. The direction of the functional opening 2331 can be confirmed by observing the indication mark 2313.

[0080] In this embodiment, the indicator mark 2313 is an arrow, and the direction indicated by the arrow is the tip of the teardrop-shaped indicator boss 2311; in other embodiments, the indicator mark 2313 may also be other symbols or marks, such as a triangle or a diamond.

[0081] Please refer to Figure 1 and Figure 8 In this embodiment, a slot 2332 is provided on the function opening 2331 of the function gear 233, and a flange 430 is provided on the buckle 410. The flange 430 is installed in the slot 2332, so that the buckle 410 is installed at the function opening 2331. In other embodiments, as long as the buckle 410 can be installed on the function opening 2331.

[0082] In this embodiment, the inner surface of the fastener 410 used to contact the threaded accessory is the working contact surface of the fastener 410, and one of the surfaces perpendicular to the working contact surface of the fastener 410 is the first end surface of the fastener 410. The flange 430 is arranged on the first end surface of the fastener 410, that is, the end of the flange 430 is located on one side of the fastener 410; the slot 2332 is arranged in the opening surface of the functional opening 2331. Therefore, when the flange 430 on the fastener 410 is matched with the slot 2332 and installed, the end of the fastener 410 away from the first end surface can extend in the direction close to the control unit 300, or extend in the direction away from the control unit 300, such as Figure 8 shown.

[0083] In this embodiment, in order to ensure that the end of the fastener 410 away from the first end surface can be stably fixed in the functional opening 2331 no matter from which direction it is extended and installed, the slot 2332 is set at the horizontal center line of the opening surface of the functional opening 2331.

[0084] Please refer to Figure 3 In this embodiment, in order to ensure a stable connection between the gear set 230 and the first positioning plate 210 and the second positioning plate 220, mounting grooves 2333 are provided on both sides of the slot 2332 on the functional opening 2331 of the functional gear 233, and mounting bosses 271 corresponding to the functional openings 2331 are provided on the first positioning plate 210 and the second positioning plate 220. The mounting bosses 271 are fixed in cooperation with the mounting grooves 2333 to fix the first positioning plate 210, the second positioning plate 220 and the functional gear 233.

[0085] Please refer to Fig. 9 and Fig.10 In this embodiment, in order to ensure the stable installation of the gear set 230, a positioning member 274 is further provided on the second positioning plate 220. There are two positioning members 274, and their positions correspond one-to-one to the positions of the auxiliary gears 232. Each auxiliary gear 232 is positioned through a positioning member 274.

[0086] In this embodiment, the control unit 300 further includes an accessory box assembly 320, which includes a box-shaped accessory box body 321 and a plurality of replaceable buckles 420, each of which is provided with a flange 430, and the flange 430 is provided at the same position as the flange 430 on the buckle 410 installed on the functional opening 2331. The inner wall surface of the accessory box body 321 is provided with a plurality of positioning grooves 3211, and each replaceable buckle 420 is installed in a positioning groove 3211 through the flange 430.

[0087] The working contact surfaces of the multiple replaceable fasteners 420 can be surfaces of different specifications and / or different shapes to meet the installation process of various threaded accessories, but the surface shapes and sizes of the multiple replaceable fasteners 420 used for installation with the functional opening 2331 are the same to ensure the installation stability of the fasteners 410 and the functional opening 2331.

[0088] In this embodiment, the number of replaceable buckles 420 is 5, so the number of positioning grooves 3211 is also 5, and the 5 positioning grooves 3211 are arranged at intervals along the axis of the control unit 300. In other embodiments, the number of replaceable buckles 420 is not limited, and can be 3, 4, 6, 7 or 8, etc., and the specific number can be increased or decreased as needed.

[0089] Please refer to Figure 2 In this embodiment, the control unit 300 further includes a control module 330 and a battery 340 . The motor 310 , the control module 330 and the battery 340 are all located at one end close to the functional unit 200 , and the accessory box assembly 320 is located at an end away from the functional unit 200 .

[0090] The battery 340 and the motor 310 are arranged in parallel, and the battery 340 is configured to supply power to the motor 310 . A control module 330 protruding from the housing 100 is arranged on one side corresponding to the motor 310 , and the control module 330 is configured to control the working state of the motor 310 .

[0091] In this embodiment, the control module 330 includes a charging port 331 , a forward button 332 , a reverse button 333 , and a torque adjustment button 334 .

[0092] Furthermore, the housing 100 includes a first housing 110, a second housing 120 and a third housing 130. The first housing 110 covers the upper surface of the functional unit 200. A raised area is provided at the first housing 110 corresponding to the indicating protrusion to avoid contact between the indicating protrusion and the first housing 110 to ensure normal rotation of the driving gear 231.

[0093] The second housing 120 and the third housing 130 cover the outer surface of the control unit 300, extend to the lower surface of the functional unit 200, and are fixedly connected to the first housing 110. The front view of the second housing 120 and the third housing 130 both present an inverted L-shaped structure to achieve the connection between the second housing 120 and the third housing 130 and the first housing 110.

[0094] In this embodiment, the second housing 120 and the third housing 130 are connected to the first housing 110 by means of hexagonal bolts 282 and screws 281, and the first positioning plate 210 and the second positioning plate 220 are further provided with mounting holes 275, through which the hexagonal bolts 282 and the screws 281 pass. Figure 2 The direction shown connects the first housing 110 , the first positioning plate 210 , the second positioning plate 220 , the second housing 120 and the third housing 130 in sequence from top to bottom.

[0095] The number of the hexagonal bolts 282 and the number of the screws 281 are both four, and the number of the mounting holes 275 is also four, and they are respectively located at the front and rear sides of the two auxiliary gears 232.

[0096] In this embodiment, in order to facilitate the positioning of the accessory box body 321, a limiting groove 272 is provided on the second shell 120 and the third shell 130, and a limiting protrusion 3212 is provided on the outer wall surface of the accessory box body 321. The limiting groove 272 cooperates with the limiting protrusion 3212 to fix the accessory box assembly 320 in the cavity formed by the shell 100.

[0097] In addition, in order to facilitate the removal of the accessory box assembly 320, a first opening groove 273 is provided on the end faces of the second shell 120 and the third shell 130 away from the first shell 110, and the limiting groove 272 and the limiting protrusion 3212 are both provided on the side close to the first opening groove 273, so that when the operator buckles open the first opening groove 273, the limiting groove 272 and the limiting protrusion 3212 are in fitting contact, and the accessory box assembly 320 can be taken out; when the accessory box assembly 320 is inserted back into the shell 100, the limiting groove 272 and the limiting protrusion 3212 cooperate to limit, so as to prevent the accessory box assembly 320 from falling out.

[0098] This embodiment provides an electric torque wrench 10, and its working principle is as follows:

[0099] like Figure 8 As shown, the buckle 410 is installed in the slot 2332 of the functional opening 2331. The installation method of the buckle 410 can be as follows: Figure 8 The flange 430 is shown installed upward or the flange 430 is installed downward, and the installation direction is based on the position of the threaded accessory to be screwed.

[0100] like Figure 2 As shown in the figure, after the buckle 410 is installed, the forward button 332 or the reverse button 333 on the control module 330 is operated to realize the forward or reverse rotation of the functional unit 200, and the torque adjustment button 334 on the control module 330 is operated to adjust the torque to realize the installation of threaded accessories in various working conditions. The motor 310 drives the active gear 231 to rotate, the active gear 231 drives the auxiliary gear 232 to rotate, the auxiliary gear 232 drives the functional gear 233 to rotate, and the functional unit 200 as a whole rotates around the motor shaft 311 to realize the screwing of the threaded accessories. The rotation process is as follows: Fig.11 and 12 shown.

[0101] like Figure 6 and Figure 7As shown, after the screwing is completed, the position of the functional opening 2331 is not necessarily the initial position, so the functional unit 200 needs to be reset, and the pushing member 250 is pushed. The pushing member 250 drives the reset member 240 to rotate, and the reset member 240 moves in the direction close to the indicating boss 2311 and pushes the indicating boss 2311. The indicating boss 2311 rotates in the reset through hole 211, driving the active gear 231 to rotate, and then driving the functional gear 233 to rotate. When the pushing member 250 cannot be pushed, the functional gear 233 is reset successfully, and the external force applied to the pushing member 250 is canceled. The elastic force of the elastic member 260 drives the pushing member 250 and the reset member 240 to reset in the direction away from the indicating boss 2311.

[0102] The electric torque wrench 10 provided in this embodiment has stable transmission and firm fixation by designing the structure and position of the four gears, so as to realize the function of a wrench; the position design between the gear set 230 formed by the four gears and the control unit 300 enables the electric torque wrench 10 to achieve the effect of radially screwing threaded accessories; the electric torque wrench 10 can be quickly reset by the structural coordination of the reset assembly; the control unit 300 integrates a motor 310 and a battery 340 for providing power, and is also provided with an accessory box assembly 320, which can accommodate multiple replaceable clips 420 to adapt to different working conditions; the installation of the clip 410 is simple and stable through the coordination of the flange 430 and the slot 2332; by designing the position of the slot 2332 and the flange 430, the clip 410 can be installed in different directions to adapt to different working conditions. The electric torque wrench 10 has a compact overall structure, reasonable layout of components, and has all the functions of forward and reverse rotation and torque adjustment of conventional electric tools, and an additional radial screwing and resetting function, and has a good application prospect.

[0103] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric torque wrench, characterized in that: It comprises a shell, wherein a cavity is formed inside the shell, and a functional unit and a control unit are arranged in the cavity, and an axis of the control unit is perpendicular to a plane where the functional unit is located; The functional unit includes a functional component and a reset component; The functional component includes a first positioning plate, a second positioning plate and a gear set, the gear set is located between the first positioning plate and the second positioning plate, and is spaced apart from the plate surfaces of the first positioning plate and the second positioning plate, and the first positioning plate and the second positioning plate are matched and fixed; The gear set includes a driving gear, an auxiliary gear and a functional gear, wherein there are at least two auxiliary gears, each of which is meshed with the driving gear and the functional gear, so that the driving gear drives the functional gear to rotate; a functional opening is provided on the gear surface of the functional gear, and the functional opening is configured to be a mounting buckle; The reset assembly includes a reset member, a push member and an elastic member, the reset member includes a guide portion and a push member, the push member is guided by the guide portion and then connected to the push member, the elastic member is sleeved on the push member and is limited between the push member and the limit portion by a limit portion provided on the push member, and one end of the push member away from the reset member extends out of the housing; The driving gear is provided with an indicating boss, the first positioning plate is provided with a reset through hole which passes through the upper and lower surfaces thereof corresponding to the indicating boss, the indicating boss passes through the reset through hole, the control unit includes a motor, the indicating boss and the reset through hole form a cam mechanism, the reset member is provided on the surface of the first positioning plate and can selectively contact the indicating boss.

2. The electric torque wrench according to claim 1, characterized in that: The indicating boss is provided with a convex hole, and the motor is connected to the indicating boss through the convex hole and is configured to drive the indicating boss to rotate; The shape of the indicating boss is a water drop shape, the resetting through hole is a circle, and the pushing part of the resetting member pushes the indicating boss to rotate in the resetting through hole; Preferably, an arc-shaped protrusion is provided at one end of the pushing portion away from the guiding portion; Preferably, an indication mark is further provided on the indication boss, and the indication direction of the indication mark is the same as the direction of the functional opening.

3. The electric torque wrench according to claim 1, characterized in that: The functional opening of the functional gear is provided with a slot, the clip is provided with a flange, and the flange is installed in the slot so that the clip is installed at the functional opening; Preferably, the flange is arranged on the first end surface of the buckle, and the first end surface is a surface perpendicular to the working contact surface of the buckle; the card slot is arranged in the opening surface of the functional opening; Preferably, the card slot is arranged at the midline of the opening surface of the functional opening; Preferably, mounting grooves are provided on both sides of the card slot, and mounting bosses corresponding to the functional openings are provided on the first positioning plate and the second positioning plate, and the mounting bosses are fixed in cooperation with the mounting grooves to fix the first positioning plate, the second positioning plate and the functional gear.

4. The electric torque wrench according to claim 3, characterized in that: The control unit further includes an accessory box assembly, which includes a box-shaped accessory box body and a plurality of replaceable buckles, each of which is provided with the flange, and the inner wall surface of the accessory box body is provided with a plurality of positioning grooves, and each of the flanges is installed in one of the positioning grooves; Preferably, a plurality of the positioning grooves are arranged at intervals along the axis of the control unit.

5. The electric torque wrench according to claim 4, characterized in that: The housing includes a first housing, a second housing and a third housing, wherein the first housing covers the upper surface of the functional unit, and the second housing and the third housing cover the outer surface of the control unit and extend to the lower surface of the functional unit and are fixedly connected to the first housing; Preferably, the second shell and the third shell are both provided with limiting grooves, and the outer wall surface of the accessory box body is provided with limiting protrusions, and the limiting grooves cooperate with the limiting protrusions to fix the accessory box assembly in the cavity formed by the shells; Preferably, a first opening groove is provided on the end surface of the second shell and / or the third shell away from the first shell, and the limiting groove and the limiting protrusion are both provided on a side close to the first opening groove; Preferably, the second shell and the third shell are connected to the first shell by bolts and / or screws, and the first positioning plate and the second positioning plate are also provided with mounting holes, and the bolts and / or screws pass through the mounting holes to connect the second shell and the third shell to the first shell.

6. The electric torque wrench according to claim 1, characterized in that: The first positioning plate is also provided with a second opening groove, the second opening groove is provided corresponding to the pushing member, the pushing member is located at the second opening groove, and the second opening groove is provided with a mounting portion protruding in a direction away from the gear set at one end thereof close to the functional opening, the mounting portion is provided with a through hole, and the pushing member passes through the through hole to be connected with the pushing portion of the reset member; Preferably, the guide portion of the reset member is two guide posts, which are respectively located on both sides of the second opening groove.

7. The electric torque wrench according to claim 1, characterized in that: The first positioning plate and / or the second positioning plate are further provided with positioning pieces, the number of the positioning pieces is the same as the number of the auxiliary gears, and each of the auxiliary gears is positioned through one of the positioning pieces.

8. The electric torque wrench according to claim 1, characterized in that: The second positioning plate is provided with a support platform protruding toward the gear set, the interior of the support platform is a hollow channel, the motor is connected to the indicating boss through the channel inside the support platform, and the support platform is in contact with the driving gear, so that the second positioning plate and the gear set are spaced apart.

9. The electric torque wrench according to claim 4, characterized in that: The control unit further comprises a control module and a battery, wherein the motor, the control module and the battery are all located at one end close to the functional unit, and the accessory box assembly is located at one end away from the functional unit; The battery and the motor are arranged in parallel, and the battery is configured to supply power to the motor. A control module protruding from the housing is arranged on one side corresponding to the motor, and the control module is configured to control the working state of the motor.

10. The electric torque wrench according to claim 9, characterized in that: The control module includes a charging port, a forward button, a reverse button and a torque adjustment button.

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