Screw turning device

Abstract

The utility model relates to the technical field of mechanical equipment, in particular to a screw turning device. The screw turning device comprises a driving part; the transmission mechanism comprises a shell, a driving assembly and two driven assemblies, the driving assembly is connected with the driving part, and the two driven assemblies are arranged on the two opposite sides of the driving assembly and are in transmission connection with the driving assembly; the two pitch changing mechanisms are connected to the side, away from the driving part, of the shell and correspond to the two driven assemblies respectively, each pitch changing mechanism comprises a pitch changing assembly rotationally connected to the shell in the extending direction of the shell and a chuck rotationally arranged at the end, away from the shell, of the pitch changing assembly, and the chucks are in transmission connection with the corresponding driven assemblies; the positioning mechanism is connected to the shell, is arranged between the two variable-pitch assemblies and is used for positioning the two variable-pitch assemblies; and the two screwdriver blades are detachably mounted on the two chucks respectively. According to the screw turning device, two screws can be mounted or dismounted at the same time, and the distance between the two screwdriver blades can be flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical assembly tools, in particular to a screwing device. BACKGROUND

[0002] In the field of mechanical assembly, the installation and disassembly of screws are common operations. The traditional screwing tool usually has a single screwdriver bit, and when facing the situation of needing to install or disassemble screws at two positions at the same time, the efficiency is low. Although the existing double-head screwing tool can tighten or disassemble screws at two positions at the same time, it cannot flexibly adjust the distance between the two screwdriver bits, and it is difficult to adapt to the installation or disassembly requirements of screws with different distances. CONTENT OF THE UTILITY MODEL

[0003] In view of the above, it is necessary to provide a screwing device which can install or disassemble two screws at the same time and flexibly adjust the distance between the two screwdriver bits.

[0004] The screwing device provided by the embodiment of the present application comprises a driving member, a transmission mechanism, two distance changing mechanisms, a positioning mechanism and two screwdriver bits. The transmission mechanism comprises a housing connected with the driving member, a driving component arranged in the housing and two driven components arranged on opposite sides of the driving component and connected with the driving component. Each distance changing mechanism is connected with the housing away from the driving member and arranged corresponding to the driven component. The positioning mechanism is connected with the housing away from the driving member and arranged between the two distance changing mechanisms. The driving member drives the two driven components to rotate through the driving component, and in turn drives the chuck and the screwdriver bit to rotate. The distance changing component is used to rotate around the driven component to adjust the distance between the two screwdriver bits.

[0005] The screwing device can drive the driving component in the transmission mechanism to rotate through the driving member, the driving component drives the two driven components to rotate, and then the chuck and the screwdriver bit are rotated, so that screw operation is simultaneously performed on two positions, and the working efficiency is greatly improved. The distance adjusting components in the two distance adjusting mechanisms can rotate around the driven components, so that the distance between the two screwdriver bits is flexibly adjusted, the installation or disassembly requirements of screws with different distances are met, and the limitations of traditional tools are overcome. The positioning mechanism is arranged at one end of the shell away from the driving member and between the two distance adjusting components, can position the distance adjusting components, ensures the accurate position of the screwdriver bit during screw operation, improves the installation precision of the screw, and reduces installation problems caused by position deviation.

[0006] In some embodiments, the driving component includes a driving shaft connected to the driving member and a driving gear connected to the driving shaft, each of the driven components includes a driven shaft rotationally connected to the shell and a driven gear connected to the driven shaft, an end of each of the driven shafts away from the driving member extends out of the shell, each of the driven gears is engaged with the driving gear, and the driving member is configured to drive the driving shaft to rotate, and then drive the driven shafts to rotate through cooperation of the driving gear and the driven gears.

[0007] In some embodiments, the shell includes a cover plate, a main body and a base connected in sequence, the driving member is connected to the cover plate, the two distance adjusting components are connected to the base, the cover plate and the base are each provided with a plurality of bearings, the plurality of bearings correspond to the driving shaft and the driven shafts respectively, and the driving shaft and the driven shafts are rotationally connected to the shell through the bearings.

[0008] In some embodiments, two guide ring portions are arranged on a side of the base away from the cover plate, and the two guide ring portions are arranged correspondingly to the two driven shafts respectively; the distance adjusting component includes a distance adjusting member and a bearing member, one end of the distance adjusting member is sleeved in the guide ring portion, the other end of the distance adjusting member extends away from the guide ring portion in a direction perpendicular to the driven shaft, the chuck is arranged at one end of the distance adjusting member away from the guide ring portion, and the bearing member is arranged on a side of the distance adjusting member away from the base; an end of the driven shaft away from the driving member penetrates through the corresponding bearing member, and the end of the driven shaft away from the driving member is provided with a limiting portion, the limiting portion abuts against a side of the bearing member away from the distance adjusting member, and is configured to support the bearing member.

[0009] In some embodiments, each of the driven assemblies further comprises a driving gear connected to the driven shaft, the driving gear abutting a side of the carrier near the distance changing member; each of the distance changing assemblies further comprises a rotating gear connected to the chuck and disposed on a side of the carrier near the distance changing member, the rotating gear being engaged with the driving gear, the driving gear driving the rotating gear to rotate, thereby driving the chuck and the screwdriver bit to rotate.

[0010] In some embodiments, each of the distance changing assemblies further comprises a plurality of connecting gears, the plurality of connecting gears being disposed between the driving gear and the rotating gear in sequence and adjacent two of the connecting gears being engaged with each other, the connecting gear near the driving gear being engaged with the driving gear, and the connecting gear near the rotating gear being engaged with the rotating gear, the driving gear driving the rotating gear to rotate through the plurality of connecting gears.

[0011] In some embodiments, each of the distance changing assemblies further comprises a plurality of rotating shafts each being rotatably connected to the distance changing member, the plurality of rotating shafts being connected to the plurality of connecting gears one by one, the rotating shafts being used to limit the connecting gears.

[0012] In some embodiments, a side of the distance changing member facing the carrier is provided with a limiting groove, the limiting groove being used to accommodate the rotating gear and the plurality of connecting gears to limit the rotating gear and the plurality of connecting gears.

[0013] In some embodiments, the positioning mechanism comprises a support connected to the housing, an adjusting member adjustably connected to the support, and two positioning members slidingly connected to the support, the two positioning members being disposed towards the two distance changing assemblies respectively, and each of the positioning members being provided with an inclined surface on a side thereof facing away from the corresponding distance changing assembly, the adjusting member abutting the inclined surfaces, the adjusting member being used to drive the two positioning members to move towards the corresponding distance changing assemblies respectively through the inclined surfaces, so that the positioning members abut the corresponding distance changing assemblies, thereby positioning the distance changing assemblies.

[0014] In some embodiments, each of the positioning members is provided with an anti-skid member on a side thereof facing the corresponding distance changing assembly, the anti-skid member being used to abut the corresponding distance changing assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural schematic view of a screwing device provided by the embodiments of the present application is shown.

[0016] Figure 2 A structural schematic view of a screwing device provided by the embodiments of the present application is shown. Figure 1 A structural schematic view of a screwing device provided by the embodiments of the present application is shown.

[0017] Figure 3 As Figure 2 The structure schematic view of the transmission mechanism, the distance changing mechanism, the positioning mechanism and the screwdriver bit.

[0018] Figure 4 As Figure 3 The structure schematic view of the transmission mechanism, the distance changing mechanism, the positioning mechanism and the screwdriver bit.

[0019] Figure 5 As Figure 1 The sectional view of the screwing device along V-V direction.

[0020] Main element symbol explanation: screwing device 100, driving piece 10, transmission mechanism 20, shell 21, cover plate 211, main body 212, base 213, guide ring part 2131, driving assembly 22, driving shaft 221, driving gear 222, driven assembly 23, driven shaft 231, driven gear 232, limiting part 233, driving gear 234, bearing 24, distance changing mechanism 30, distance changing assembly 31, distance changing piece 311, limiting groove 3111, bearing piece 312, rotating gear 313, connecting gear 314, rotating shaft 315, chuck 32, positioning mechanism 40, supporting piece 41, adjusting piece 42, positioning piece 43, inclined surface 431, anti-skid piece 44, screwdriver bit 50. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same reference numerals throughout the several views. The embodiments described below are examples for explaining the present application and are not intended to limit the present application.

[0022] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection, or can be in communication with each other, it can be direct connection, or indirect connection through intermediate medium, it can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0024] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] Please refer to Figure 1 , the embodiment of the present application provides a screwing device 100, including a driving member 10, a transmission mechanism 20, two variable distance mechanisms 30, a positioning mechanism 40 and two screwdriver heads 50.

[0026] Specifically, please refer to Figure 1 , Figure 2 and Figure 3 , the driving member 10 can be a driving source such as a motor, and the driving member 10 can rotate forward and backward, so that the two screwdriver heads 50 of the screwing device 100 can rotate forward or backward synchronously to realize the function of installing or dismounting screws.

[0027] The transmission mechanism 20 includes a housing 21 connected with the driving member 10, a driving component 22 and two driven components 23 arranged on the housing 21, the driving component 22 is connected with the output end of the driving member 10, and the two driven components 23 are arranged on the opposite sides of the driving component 22 and are respectively in transmission connection with the driving component 22. The two driven components 23 and the driving component 22 can be connected in various ways such as meshing and belt connection, so that the driving component 22 can drive the two driven components 23 to rotate synchronously.

[0028] The two variable distance mechanisms 30 are connected to the side of the housing 21 away from the driving member 10 and are respectively arranged corresponding to the two driven components 23, each variable distance mechanism 30 includes a variable distance component 31 rotatably connected to the housing 21 along the extension direction of the housing 21 and a chuck 32 rotatably arranged at one end of the variable distance component 31 away from the housing 21, and the chuck 32 is in transmission connection with the corresponding driven component 23. The chuck 32 can be a magnetic chuck, a spring chuck, a three-jaw chuck or any chuck that can connect the screwdriver head 50, and the size of the chuck 32 can be set according to actual needs, which is not limited here.

[0029] The positioning mechanism 40 is connected to the end of the shell 21 away from the driving member 10 and is arranged between the two distance changing assemblies 31, and is used for positioning the two distance changing assemblies 31. It can be understood that the distance changing assembly 31 is rotationally connected to the shell 21, and in the use process, the distance changing assembly 31 can rotate, causing the position of the chuck 32 to be inaccurate. By arranging the positioning mechanism 40, the position of the distance changing assembly 31 can be fixed to improve the stability in the use process.

[0030] The two screwdriver bits 50 are respectively detachably installed on the two chucks 32, and the screwdriver bit 50 can be a T-shaped bit, a cross-shaped bit, a star-shaped bit, a hexagonal bit, etc. The specific type is replaced according to actual needs to improve the application range.

[0031] Among them, the driving member 10 drives the two driven assemblies 23 to rotate through the driving assembly 22, and in turn drives the chuck 32 and the screwdriver bit 50 to rotate. The distance changing assembly 31 is used for rotating around the driven assembly 23 to adjust the distance between the two screwdriver bits 50.

[0032] The screwing device 100 provided by the embodiment of the application can drive the driving assembly 22 in the transmission mechanism 20 to rotate through the driving member 10, drive the two driven assemblies 23 to rotate through the driving assembly 22, and in turn drive the chuck 32 and the screwdriver bit 50 to rotate, so as to realize screwing operation on two positions at the same time and greatly improve the work efficiency. The distance changing assembly 31 in the two distance changing mechanisms 30 can rotate around the driven assembly 23, so as to flexibly adjust the distance between the two screwdriver bits 50, adapt to the installation or dismounting requirements of screws with different distances, and overcome the limitations of traditional tools. The positioning mechanism 40 is arranged at the end of the shell 21 away from the driving member 10 and between the two distance changing assemblies 31, and can position the distance changing assembly 31, so as to ensure the position of the screwdriver bit 50 to be accurate in the screwing operation process, improve the screw installation precision, and reduce the installation problems caused by position deviation.

[0033] In some embodiments, please refer to Figure 2 and Figure 3The driving component 10 is connected to the driving shaft 221 of the driving assembly 22, and each of the driven assemblies 23 is rotatably connected to the housing 21. The driving shaft 221 of the driving assembly 22 is connected to the driving component 10, and the driving gear 222 is connected to the middle part of the driving shaft 221. Each of the driven shafts 231 of the driven assemblies 23 is rotatably connected to the housing 21, and the driven gear 232 is connected to the middle part of the driven shaft 231 and corresponds to the position of the driving gear 222. The driving component 10 is connected to the driving shaft 221, the driving gear 222 is connected to the driving shaft 221, and the driven shaft 231 is rotatably connected to the housing 21 and meshes with the driving gear 222 through the driven gear 232, so that the power of the driving component 10 can be effectively transmitted to the driven assemblies 23, ensuring the stability and reliability of power transmission. The driven gears 232 of the two driven assemblies 23 mesh with the driving gear 222, so that the two driven shafts 231 can rotate synchronously. In actual application, the driving component 10 drives the driving shaft 221 to rotate, and then drives the driven shaft 231 to rotate through the precise meshing of the driving gear 222 and the driven gear 232, so that efficient power transmission can be realized, and sufficient torque can be obtained by the two screwdriver bits 50 to perform screw tightening or dismounting operation. At the same time, the gear transmission mode can adjust the gear ratio according to different use requirements, so as to control the rotating speed of the driven shaft 231, adapt to different working scenes, and improve the versatility and flexibility of the screw driving device 100.

[0034] In some embodiments, referring to Figure 2 and Figure 3The shell 21 comprises a cover plate 211, a main body 212 and a base 213 connected in sequence, the driving member 10 is connected to the cover plate 211, the two variable-pitch assemblies 31 are both connected to the base 213, the cover plate 211 and the base 213 are both provided with a plurality of bearings 24, the plurality of bearings 24 are respectively corresponding to the driving shaft 221 and the driven shaft 231, and the driving shaft 221 and the driven shaft 231 are rotatably connected to the shell 21 through the bearings 24. The cover plate 211 can be a plate structure, which provides a stable mounting position for the driving member 10 and ensures that the driving member 10 can accurately transmit power to the driving assembly 22. The main body 212 serves to connect and support the cover plate 211 and the base 213, and also provides a protection space for the internal transmission mechanism 20, preventing external dust, impurities and the like from interfering with the transmission mechanism 20. The base 213 is used to connect the variable-pitch assembly 31 and provide stable support for the variable-pitch mechanism 30, ensuring that the variable-pitch mechanism 30 can work normally. The number of bearings 24 can be three, six or the like, and the driving shaft 221 and the two driven shafts 231 can be connected with one or two bearings 24. The arrangement of the bearings 24 greatly improves the rotation accuracy and stability of the driving shaft 221 and the driven shaft 231. The bearings 24 can reduce the frictional resistance between the driving shaft 221, the driven shaft 231 and the shell 21, so that the driving shaft 221 and the driven shaft 231 rotate more smoothly, reducing energy loss. At the same time, the bearings 24 can also bear the radial and axial forces generated by the driving shaft 221 and the driven shaft 231 during rotation, ensuring the positional accuracy of the driving shaft 221 and the driven shaft 231, preventing the driving shaft 221 and the driven shaft 231 from shaking or deviating, thereby improving the stability and reliability of the entire transmission system.

[0035] In some embodiments, referring to Figure 2 , Figure 3 and Figure 4 , the base 213 is provided with two guide ring portions 2131 on the side away from the cover plate 211, and the two guide ring portions 2131 are respectively arranged corresponding to the two driven shafts 231. The guide ring portion 2131 is generally a cylindrical structure, and one end of each of the two driven shafts 231 extending out of the shell 21 is arranged in the corresponding guide ring portion 2131.

[0036] The pitch changing assembly 31 comprises a pitch changing piece 311 and a bearing piece 312. One end of the pitch changing piece 311 is sleeved in the guide ring part 2131, and the other end of the pitch changing piece 311 is away from the guide ring part 2131 in a direction perpendicular to the driven shaft 231. The chuck 32 is arranged at the end of the pitch changing piece 311 away from the guide ring part 2131. The bearing piece 312 is arranged at one side of the pitch changing piece 311 away from the base 213. The pitch changing piece 311 can be a special-shaped structure. One end of the pitch changing piece 311 is sleeved in the guide ring part 2131. It can be understood that the pitch changing piece 311 can rotate around the axis of the guide ring part 2131. The bearing piece 312 can be a plate-shaped structure to support the pitch changing piece 311 and the chuck 32.

[0037] The guide ring part 2131 arranged on the base 213 provides a clear track and guide for the movement of the pitch changing piece 311. When adjusting the distance between the two screwdriver bits 50, the pitch changing piece 311 is sleeved at one end of the guide ring part 2131, so that the pitch changing operation can be carried out in a predetermined direction, avoiding random shaking or deviation, thereby ensuring the accuracy of the pitch changing.

[0038] The driven shaft 231 penetrates through the corresponding bearing piece 312 at the end away from the driving piece 10, and the driven shaft 231 is provided with a limiting part 233 at the end away from the driving piece 10. The limiting part 233 abuts against one side of the bearing piece 312 away from the pitch changing piece 311, for supporting the bearing piece 312. The limiting part 233 on the driven shaft 231 abuts against one side of the bearing piece 312 away from the pitch changing piece 311, which plays a limiting and supporting role. The limiting part 233 can prevent the bearing piece 312 from moving excessively or separating from the driven shaft 231, ensuring the position stability of the bearing piece 312 during the working process, thereby ensuring the normal operation of the pitch changing assembly 31.

[0039] In some embodiments, referring to Figure 2 and Figure 3 Each driven assembly 23 further comprises a driving gear 234 connected to the driven shaft 231, which abuts against one side of the bearing piece 312 close to the pitch changing piece 311. Each pitch changing assembly 31 further comprises a rotating gear 313 connected to the chuck 32 and arranged at one side of the bearing piece 312 close to the pitch changing piece 311. The rotating gear 313 is engaged with the driving gear 234. The driving gear 234 drives the rotating gear 313 to rotate, thereby driving the chuck 32 and the screwdriver bit 50 to rotate. The driving gear 234 on the driven shaft 231 is engaged with the rotating gear 313 in the pitch changing assembly 31, which realizes efficient transmission of the power of the driven shaft 231, drives the rotating gear 313 connected with the chuck 32 to rotate accurately, so that the chuck 32 and the screwdriver bit 50 can accurately perform screw tightening or disassembly operation, thereby improving the transmission efficiency, adaptability and flexibility of the device.

[0040] In some embodiments, referring toFigure 2 and Figure 3 Each variable distance assembly 31 further comprises a plurality of connecting gears 314, which are sequentially arranged between the driving gear 234 and the rotating gear 313 and adjacent two connecting gears 314 are engaged with each other, the connecting gear 314 close to the driving gear 234 is engaged with the driving gear 234, and the connecting gear 314 close to the rotating gear 313 is engaged with the rotating gear 313, the driving gear 234 drives the rotating gear 313 to rotate through the plurality of connecting gears 314. The number of connecting gears 314 can be two, three, etc., by arranging a plurality of connecting gears 314, the distance between the chuck 32 and the driving gear 234 can be increased, and the length of the variable distance piece 311 is increased to be suitable for screws of various distances. In an embodiment, the number of connecting gears 314 of each variable distance assembly 31 can also be one, and the connecting gear 314 is engaged with the driving gear 234 and the rotating gear 313.

[0041] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 5 Each variable distance assembly 31 further comprises a plurality of rotating shafts 315, which are rotatably connected with the variable distance piece 311, and the plurality of rotating shafts 315 are connected with the plurality of connecting gears 314 one by one, and the rotating shaft 315 is used for limiting the connecting gear 314. The number of transmission shafts can be two, three, etc., by arranging the rotating shaft 315, the connecting gear 314 can be provided with stable support and limiting, the gear is ensured to be accurately engaged, and the accuracy and stability of the transmission system are improved.

[0042] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 4 The variable distance piece 311 is provided with a limiting groove 3111 on the side facing the bearing piece 312, and the limiting groove 3111 is used for accommodating the rotating gear 313 and the plurality of connecting gears 314 to limit the rotating gear 313 and the plurality of connecting gears 314. The limiting groove 3111 on the variable distance piece 311 can accommodate the rotating gear 313 and the plurality of connecting gears 314, and has a good limiting effect, ensures the gear to be accurately engaged, improves the stability and accuracy of the transmission system, protects the gear from external interference, and provides convenience during assembly and maintenance, facilitates the quick installation, inspection and replacement of the gear, and prolongs the service life of the device.

[0043] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 5The positioning mechanism 40 comprises a support 41 connected to the shell 21, an adjusting member 42 adjustably connected to the support 41, and two positioning members 43 slidably connected to the support 41, the two positioning members 43 are respectively arranged towards the two variable-distance assemblies 31, and each positioning member 43 is provided with an inclined surface 431 on a side away from the corresponding variable-distance assembly 31, the adjusting member 42 abuts against the inclined surface 431, the adjusting member 42 is used to push the two positioning members 43 to move towards the corresponding variable-distance assembly 31 through the inclined surface 431, so that the positioning member 43 abuts against the corresponding variable-distance assembly 31, thereby positioning the variable-distance assembly 31. The support 41 can be a block structure and is arranged between the two variable-distance members 311, the two positioning members 43 are slidably connected to the support 41 and can abut against the corresponding variable-distance member 311, and the adjusting member 42 can be a structure such as a bolt. Each positioning member 43 is provided with an inclined surface 431 on a side away from the corresponding variable-distance assembly 31, and the adjusting member 42 abuts against the inclined surface 431, so that the adjusting member 42 can accurately control the movement direction and distance of the positioning member 43. When the adjusting member 42 applies force, the two positioning members 43 can be pushed to move towards the corresponding variable-distance member 311 through the action of the inclined surface 431, until the positioning member 43 abuts against the variable-distance member 311, so as to ensure the position stability of the variable-distance assembly 31 during the working process. When it is necessary to adjust the variable-distance member 311, the adjusting member 42 is loosened to move away from the two positioning members 43, the two positioning members 43 do not apply force to the variable-distance member 311, and the variable-distance member 311 can be rotated for adjustment.

[0044] In some embodiments, referring to Figure 2 , Figure 3 and Figure 5 , each positioning member 43 is provided with an anti-skid member 44 on a side towards the corresponding variable-distance assembly 31, and the anti-skid member 44 is used to abut against the corresponding variable-distance assembly 31. The material of the anti-skid member 44 can be rubber, etc., and the anti-skid member 44 can increase the friction between the variable-distance member 311 and the anti-skid member 44, thereby improving the position stability of the variable-distance member 311. In the embodiment, the side of the anti-skid member 44 used to contact the variable-distance member 311 can be provided with an arc-shaped surface matched with the variable-distance member 311, so that the anti-skid member 44 can increase the contact area with the variable-distance assembly 31 and reduce the positioning error.

[0045] The working process of the screwing device 100 provided in the embodiment is as follows:

[0046] When the driving member 10 is started, the driving shaft 221 in the driving assembly 22 is driven to rotate, and the driving gear 222 connected to the driving shaft 221 is driven to rotate. The driving gear 222 drives the driven shaft 231 through the driven gear 232 in the driven assembly 23. The driven shaft 231 is supported by the housing 21 to rotate, and drives the driving gear 234 connected thereto to rotate. The driving gear 234 drives the rotating gear 313 through the plurality of connecting gears 314, and the rotating gear 313 is connected to the chuck 32, thereby driving the chuck 32 and the screwdriver bit 50 detachably installed on the chuck 32 to rotate.

[0047] When the distance between the two screwdriver bits 50 needs to be adjusted, the distance-changing assembly 31 rotates around the driven assembly 23. Specifically, one end of the distance-changing member 311 is sleeved on the guide ring part 2131 of the base 213, and the other end is connected to the chuck 32. The distance between the two screwdriver bits 50 is changed by rotating the distance-changing member 311 in the direction extending from the driven shaft 231. The carrier member 312 provides stable support for the distance-changing assembly 31 under the support of the limiting part 233 of the driven shaft 231.

[0048] After the distance is changed, the positioning mechanism 40 positions the two distance-changing assemblies 31. The support member 41 is connected to the housing 21, and the adjusting member 42 is adjustably connected to the support member 41. The positioning member 43 is pushed against the inclined surface 431 on the two positioning members 43, so that the positioning member 43 slides and abuts against the corresponding distance-changing assembly 31. The anti-slip member 44 provided on the side of the positioning member 43 facing the distance-changing assembly 31 enhances the stability of positioning and prevents the distance-changing assembly 31 from moving accidentally during work.

[0049] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be embraced in the present application.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application.

Claims

1. A screwing device, characterized in that The utility model relates to a screwdriver, which comprises a driving member, a transmission mechanism, two variable distance mechanisms and a positioning mechanism. The transmission mechanism comprises a housing connected with the driving member, a driving assembly arranged in the housing and two driven assemblies. The driving assembly is connected with the output end of the driving member. The two driven assemblies are arranged on the opposite sides of the driving assembly and are respectively in transmission connection with the driving assembly. Each variable distance mechanism comprises a variable distance assembly rotatably connected with the housing along the extension direction of the housing and a chuck rotatably arranged at the end of the variable distance assembly away from the housing. The chuck is in transmission connection with the corresponding driven assembly. The positioning mechanism is arranged between the two variable distance assemblies and is connected with the end of the housing away from the driving member. The positioning mechanism is used for positioning the two variable distance assemblies. The two screwdriver bits are respectively detachably installed in the two chucks. The driving member drives the two driven assemblies to rotate through the driving assembly, and then drives the chucks and the screwdriver bits to rotate. The variable distance assembly is used for rotating around the driven assembly to adjust the distance between the two screwdriver bits.

2. The screwdriver according to claim 1, wherein the driving assembly comprises a driving shaft connected with the driving member and a driving gear connected with the driving shaft. Each driven assembly comprises a driven shaft rotatably connected with the housing and a driven gear connected with the driven shaft. The end of each driven shaft away from the driving member extends out of the housing. Each driven gear is in meshing connection with the driving gear. The driving member is used for driving the driving shaft to rotate, and then drives the driven shaft to rotate through the cooperation of the driving gear and the driven gear.

3. The screwdriver according to claim 2, wherein the housing comprises a cover plate, a main body and a base connected in sequence. The driving member is connected with the cover plate. The two variable distance assemblies are connected with the base. The cover plate and the base are respectively provided with a plurality of bearings corresponding to the driving shaft and the driven shaft. The driving shaft and the driven shaft are rotatably connected with the housing through the bearings.

4. The screwdriver according to claim 3, wherein the side of the base away from the cover plate is provided with two guide ring parts corresponding to the two driven shafts. The variable distance assembly comprises a variable distance piece and a bearing piece. One end of the variable distance piece is sleeved in the guide ring part. The other end of the variable distance piece is away from the guide ring part along the direction perpendicular to the extension direction of the driven shaft. The chuck is arranged at the end of the variable distance piece away from the guide ring part. The bearing piece is arranged at the side of the variable distance piece away from the base. The end of the driven shaft away from the driving member penetrates through the corresponding bearing piece. The end of the driven shaft away from the driving member is provided with a limiting part. The limiting part is in abutment with the side of the bearing piece away from the variable distance piece, and is used for supporting the bearing piece.

5. The screwing device of claim 4, wherein each of the driven assemblies further comprises a driving gear connected to the driven shaft, the driving gear abutting the carrier near the distance changing member; each of the distance changing assemblies further comprises a rotating gear connected to the chuck and disposed on the carrier near the distance changing member, the rotating gear being engaged with the driving gear, the driving gear driving the rotating gear to rotate, thereby driving the chuck and the screwdriver bit to rotate.

6. The screwing device of claim 5, wherein each of the distance changing assemblies further comprises a plurality of connecting gears, the plurality of connecting gears being disposed between the driving gear and the rotating gear in sequence and adjacent connecting gears being engaged with each other, the connecting gear near the driving gear being engaged with the driving gear, and the connecting gear near the rotating gear being engaged with the rotating gear, the driving gear driving the rotating gear to rotate through the plurality of connecting gears.

7. The screwing device of claim 6, wherein each of the distance changing assemblies further comprises a plurality of rotating shafts each being rotatably connected to the distance changing member, the plurality of rotating shafts being connected to the plurality of connecting gears one-to-one, the rotating shafts being used to limit the connecting gears.

8. The screwing device of claim 6, wherein the distance changing member is provided with a limiting groove on a side facing the carrier, the limiting groove being used to accommodate the rotating gear and the plurality of connecting gears to limit the rotating gear and the plurality of connecting gears.

9. The screwing device of claim 1, wherein the positioning mechanism comprises a support connected to the housing, an adjusting member adjustably connected to the support, and two positioning members slidingly connected to the support, the two positioning members being disposed towards the two distance changing assemblies respectively, and each of the positioning members being provided with an inclined surface on a side facing away from the corresponding distance changing assembly, the adjusting member abutting the inclined surface, the adjusting member being used to drive the two positioning members to move towards the corresponding distance changing assemblies respectively through the inclined surface to abut the distance changing assemblies, thereby positioning the distance changing assemblies.

10. The screwing device of claim 9, wherein each of the positioning members is provided with an anti-skid member on a side facing the corresponding distance changing assembly, the anti-skid member being used to abut the distance changing assembly. ​ ​ ​ ​ ​ ​

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