Electric screw driver capable of quickly replacing bit

Abstract

The utility model discloses a quick-change electric screwdriver which comprises a shell frame, a rotating shaft core pipe, a driving component, a quick-change ejector rod, a screwdriver head storage rotating drum, a screwdriver head clamping mechanism and a limiting and fixing sleeve piece, an adjustable screwdriver head limiting component is installed on the rotating shaft core pipe in a sleeved mode, and a hollow sleeve piece and the rotating shaft core pipe piece jointly form a screwdriver head quick-change channel. The quick-changing ejector rod is movably installed in the quick-changing channel of the screwdriver head, the screwdriver head storage rotary drum is provided with a plurality of screwdriver head storage pieces, the screwdriver head storage pieces are provided with quick-changing through grooves of the screwdriver head, the screwdriver head clamping mechanism is movably installed in the quick-changing through grooves of the screwdriver head, screwdriver head pieces are clamped on the screwdriver head clamping mechanism, and the hollow sleeve piece is provided with a screwdriver head placing groove. And the bit imbedding groove is communicated with the bit quick-change channel. According to the electric screwdriver, the rotating shaft core pipe, the quick-change ejector rod and the screwdriver head storage rotating cylinder are introduced and matched with the screwdriver head clamping mechanism, the first magnetic attraction block and the second magnetic attraction block, the screwdriver head piece selection efficiency and the screwdriver head piece replacement efficiency are remarkably improved, and the overall use efficiency and the user experience of the electric screwdriver are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric screwdrivers, in particular to an electric screwdriver with a quick-change bit. Background Art

[0002] In the application field of electric screwdrivers, the replacement efficiency of the screwdriver bits directly affects the work efficiency and user experience. When replacing the screwdriver bits of traditional electric screwdrivers, users usually need to select the appropriate model from the scattered screwdriver bits, which is not only time-consuming but also prone to errors. Especially in the scenario where the screwdriver bits need to be replaced frequently, this traditional replacement method obviously cannot meet the needs of efficient and accurate work. First of all, the traditional storage method of screwdriver bits is mostly scattered or simply classified. Users need to identify them one by one when selecting screwdriver bits, which undoubtedly increases the time and difficulty of replacement. Especially when selecting from multiple models of screwdriver bits, it is easy to get confused and misselect, resulting in reduced work efficiency, and may even have a negative impact on the work due to the wrong selection of screwdriver bits. Secondly, the traditional replacement process is cumbersome. Users need to manually loosen the screwdriver bit, remove the old screwdriver bit, install the new screwdriver bit, and tighten it manually. This process is not only time-consuming, but also there may be a risk of uneven force causing the screwdriver bit to loosen or be damaged during the tightening process.

[0003] In summary, there are obvious shortcomings in the traditional electric screwdriver bit replacement technology, which are mainly reflected in the low efficiency of bit selection and the cumbersome replacement process. These problems directly affect the use efficiency and user experience of the electric screwdriver. Utility Model Content

[0004] In view of this, the utility model aims to solve the deficiencies in the prior art and its main purpose is to provide an electric screwdriver with quick-change bit changes, which solves the technical problems of low bit selection efficiency and cumbersome replacement process when replacing bit of traditional electric screwdrivers, which significantly affects the bit replacement efficiency, electric screwdriver use efficiency and user experience.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses an electric screwdriver with a quick-change bit, comprising:

[0007] Shell frame;

[0008] A rotating shaft core tube is rotatably mounted on the shell frame, one end of the rotating shaft core tube extends out of the shell frame and is sleeved with an adjustable bit limiting component;

[0009] A driving component is arranged beside the rotating shaft core tube and mounted on the shell frame, and a transmission end of the driving component is connected to the rotating shaft core tube through a conversion gear set;

[0010] A hollow sleeve member, fixedly installed at one end of the housing frame away from the bit limiting member, and jointly forming a bit quick-change channel with the rotating shaft core member;

[0011] A quick-change ejector rod, movably installed in the bit quick-change channel and capable of reciprocating along the length direction of the bit quick-change channel;

[0012] A bit storage rotating cylinder, sleeved and installed on the hollow sleeve member and rotatably connected to the hollow sleeve member. A plurality of bit storage members are provided on the bit storage rotating cylinder, and the plurality of bit storage members are circumferentially arranged in a circular array along the circumferential direction of the bit storage rotating cylinder. A bit quick-change through slot is opened on the bit storage member;

[0013] A bit clamping mechanism, movably installed in the bit quick-change through slot. A bit member is clamped on the bit clamping mechanism. The bit clamping mechanism can reciprocate along the length direction close to the bit quick-change through slot. A bit insertion slot is opened on the hollow sleeve member, and the bit insertion slot is communicated with the bit quick-change channel. Each time the bit storage rotating cylinder rotates at equal intervals, the bit quick-change through slot of any one of the bit storage members is directly corresponding to the bit insertion slot. A first magnetic attraction block is installed at the fixed end of the bit member, and a second magnetic attraction block adapted to the first magnetic attraction block is provided at one end of the quick-change ejector rod away from the bit storage rotating cylinder;

[0014] A limit fixing sleeve member, fixedly installed at one end of the hollow sleeve member away from the housing frame, used to limit the position of the bit storage rotating cylinder. A top rod fixing member is clamped and installed at one end of the limit fixing sleeve member away from the bit storage rotating cylinder, and one end of the quick-change ejector rod away from the bit limiting member is rotatably installed on the top rod fixing member.

[0015] As a preferred solution, the bit limiting member includes:

[0016] An installation sleeve, sleeved and installed on the rotating shaft core tube and fixedly screwed to the rotating shaft core tube. A plurality of installation through holes are opened on the outer peripheral side of the installation sleeve, and an annular limit block protrudes from one end of the installation through hole away from the housing frame;

[0017] A guiding pull rod, movably installed on the installation through hole and capable of reciprocating along the axial length direction of the installation through hole. A first limit convex block protrudes from one end of the guiding pull rod away from the annular limit block;

[0018] A first elastic member, sleeved and installed on the guiding pull rod. One end of the first elastic member abuts against the annular limit block, and the other end abuts against the first limit convex block;

[0019] The bit limiting member, one end of the guiding pull rod away from the case frame extends out of the installation through hole and is fixedly connected with the bit limiting member through a bolt fastening assembly.

[0020] As a preferred solution, the bolt fastening assembly includes a first bolt member and a second bolt member. The bit limiting member is arranged between the first bolt member and the second bolt member and is sleeved on the guiding pull rod. Both the first bolt member and the second bolt member are screwed and fixed with the guiding pull rod.

[0021] As a preferred solution, the bit clamping mechanism includes:

[0022] The installation guide rod. One end of the bit quick-change through slot close to the hollow sleeve member is also convexly provided with an annular installation convex block. A plurality of the installation guide rods are fixedly installed on one side of the annular installation convex block away from the hollow sleeve member and are equidistantly distributed on opposite sides of the annular installation convex block;

[0023] The support plate member is movably arranged in the bit quick-change through slot and is sleeved on the installation guide rod. The support plate member can reciprocally move along the length direction of the bit quick-change through slot;

[0024] The second elastic member is sleeved on the installation guide rod. One end of the second elastic member abuts against the annular installation convex block, and the other end abuts against the support plate member;

[0025] The elastic clip is installed on one side of the support plate member close to the hollow sleeve member. One end of the elastic clip away from the support plate member is provided with a chuck member. One side of the chuck member close to the case frame is provided with a guiding inclined surface, and a guiding inclined slot adapted to the guiding inclined surface is opened on the bit member;

[0026] The operation button is installed on one side of the support plate member away from the hollow sleeve member. A cover is also snap-fitted on the bit storage member, and a first avoidance through slot corresponding to the operation button is opened on the cover.

[0027] As a preferred solution, the housing frame includes a first housing sleeve, a connecting housing sleeve and a second housing sleeve. The first housing sleeve is sleeved and installed at one end of the rotating shaft core tube close to the bit limiting component. The second housing sleeve is sleeved and installed at the other end of the rotating shaft core tube. The first housing sleeve is fixedly connected to the second housing sleeve through the connecting housing sleeve. The driving component is installed on the connecting housing sleeve. The connecting housing sleeve is provided with a first avoidance notch corresponding to the conversion gear set. One end of the rotating shaft core tube sleeved and installed in the first housing sleeve further protrudes with a first rotating ring block. One end of the first housing sleeve close to the bit limiting component is provided with a second limiting convex block corresponding to the first rotating ring block. First guiding sliding ring grooves are respectively formed on one side of the first rotating ring block and the second limiting convex block close to each other. The two first guiding sliding ring grooves together form a first guiding sliding channel. One end of the rotating shaft core tube sleeved and installed in the second housing sleeve further protrudes with a second rotating ring block. A rotating abutting block corresponding to the second rotating ring block is screwed and installed at one end of the second housing sleeve close to the hollow sleeve component. Second guiding sliding ring grooves are respectively formed on one side of the rotating abutting block and the second rotating ring block close to each other. The two second guiding sliding ring grooves together constitute a second guiding sliding channel. Ball bearings are installed in both the first guiding sliding channel and the second guiding sliding channel.

[0028] As a preferred solution, an operating rotating handle further protrudes from one side of the rotating abutting block away from the rotating shaft core tube. A second avoidance groove corresponding to the operating rotating handle is further formed on the hollow sleeve component.

[0029] As a preferred solution, a third limiting convex block protrudes from the quick-change ejector rod. A fourth limiting convex block corresponding to the third limiting convex block protrudes inside the limiting fixed sleeve component. The diameter dimension of the third limiting convex block is not greater than the diameter dimension of the bit quick-change channel. The linear distance from the third limiting convex block to the second magnetic attracting block is equal to the linear distance from one end of the bit insertion groove close to the ejector rod fixing component to the fourth limiting convex block.

[0030] As a preferred solution, engaging and embedding grooves are further formed on both sides of one end of the limiting fixed sleeve component away from the bit storage rotating cylinder. An installation groove communicating with the engaging and embedding grooves is further formed on the outer peripheral side wall of the limiting fixed sleeve component. An elastic clamping component is installed on the ejector rod fixing component. The elastic clamping component passes through the engaging and embedding grooves and is clamped and installed on the installation groove. A clamping unlocking component is further provided on the limiting fixed sleeve component. An unlocking convex block corresponding to the installation groove is installed on the clamping unlocking component.

[0031] As a preferred solution, one end of the quick-change ejector rod away from the bit limiting component is further convexly provided with a mounting stud. The diameter of the mounting stud is smaller than that of the quick-change ejector rod. The ejector rod fixing member is rotatably mounted on the mounting stud. One end of the mounting stud away from the quick-change ejector rod is further provided with a limiting screw member for limiting the position of the ejector rod fixing member on the mounting stud.

[0032] As a preferred solution, the conversion gear set includes a first driving bevel gear and a second driving bevel gear. The first driving bevel gear is meshed and connected with the second driving bevel gear. The first driving bevel gear is mounted on the rotating shaft core tube, and the second driving bevel gear is mounted on the driving end of the driving component.

[0033] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions, it mainly realizes an integrated bit storage and quick replacement mechanism by introducing a rotating shaft core tube, a quick-change ejector rod and a bit storage rotating cylinder, cooperating with a bit clamping mechanism, a first magnetic attraction block and a second magnetic attraction block, optimizes the locking and releasing of the bit, meets the requirements of quick and accurate selection and quick replacement of the bit, significantly improves the bit replacement efficiency, simplifies the replacement process, reduces the risk of incorrect selection and damage of the bit, and thus improves the overall use efficiency and user experience of the electric screwdriver.

[0034] To more clearly illustrate the structural features and functions of the present utility model, the following will detail the present utility model in combination with the attached drawings and specific embodiments. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of a bit quick-change electric screwdriver according to an embodiment of the present application;

[0036] Figure 2 is an exploded schematic structural diagram of a bit quick-change electric screwdriver according to an embodiment of the present application;

[0037] Figure 3 is an exploded schematic structural diagram of a bit quick-change electric screwdriver from another perspective according to an embodiment of the present application;

[0038] Figure 4 is an exploded schematic structural diagram of a bit limiting component according to an embodiment of the present application;

[0039] Figure 5 is an exploded schematic structural diagram of a bit storage rotating cylinder according to an embodiment of the present application;

[0040] Figure 6 is a cross-sectional view of a bit quick-change electric screwdriver according to an embodiment of the present application;

[0041] Figure 7It is a cross-sectional view of the limit fixing sleeve part of the embodiment of the present application.

[0042] Explanation of reference numerals:

[0043] 10. Frame; 11. First housing sleeve; 111. Second limit convex block; 112. First guide sliding ring groove; 113. First guide sliding channel; 12. Connecting housing sleeve; 121. First avoidance notch; 13. Second housing sleeve; 131. Rotating abutting block; 132. Operating knob; 14. Ball

[0044] 20. Shaft core tube; 21. First rotating ring block; 22. Second rotating ring block; 221. Second guide sliding ring groove; 222. Second guide sliding channel; 23. Conversion gear set; 231. First driving bevel gear; 232. Second driving bevel gear; 24. Bit quick change channel

[0045] 30. Bit limit component; 31. Installation sleeve; 311. Installation through hole; 312. Ring-shaped limit block; 32. Guide pull rod; 321. First limit convex block; 33. Bit limit piece; 34. Bolt fastening assembly; 341. First bolt piece; 342. Second bolt piece; 35. First elastic piece

[0046] 40. Driving component

[0047] 50. Hollow sleeve part; 51. Bit insertion groove; 52. Second avoidance groove

[0048] 60. Quick change ejector rod; 61. Installation convex column; 62. Third limit convex block; 63. Second magnetic attraction block

[0049] 70. Bit storage rotating cylinder; 71. Bit storage part; 711. Bit quick change through groove; 712. Ring-shaped installation convex block; 72. Cover; 721. First avoidance through groove

[0050] 80. Bit clamping mechanism; 81. Installation guide rod; 82. Second elastic piece; 83. Support plate part; 84. Elastic clip; 841. Clamping head part; 842. Guide inclined surface; 85. Operating button; 86. Bit part; 861. Guide inclined groove; 862. First magnetic attraction block

[0051] 90. Limit fixing sleeve part; 91. Ejector rod fixing piece; 92. Limit screwing piece; 93. Fourth limit convex block; 94. Clamping and embedding groove; 95. Installation groove; 96. Clamping and unlocking piece; 961. Unlocking convex block Detailed implementation manner

[0052] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0054] Please refer to Figures 1 to 7 , the embodiment of the present utility model provides a bit quick-change electric screwdriver, including:

[0055] A housing frame 10, as the connection and support foundation of the overall structure, ensures the stable installation and operation of the internal components.

[0056] A rotating shaft core tube 20 is rotatably installed on the housing frame 10 to achieve the transmission of rotational power. One end of the rotating shaft core tube 20 extends out of the housing frame 10 and is sleeved with an adjustable bit limiting component 30 for precisely fixing and releasing the bit 86, improving the stability of the bit 86 installation and the convenience of replacement.

[0057] A driving component 40, as the power source, is arranged beside the rotating shaft core tube 20 and is installed on the housing frame 10. The transmission end of the driving component 40 is connected to the rotating shaft core tube 20 through a conversion gear set 23 to achieve efficient power transmission and ensure the smooth rotation operation of the bit 86.

[0058] A hollow sleeve member 50 is fixedly installed at one end of the housing frame 10 away from the bit limiting component 30 and jointly forms a bit quick-change channel 24 with the rotating shaft core tube 20 to provide a smooth path for the quick change of the bit 86.

[0059] A quick-change ejector rod 60 is movably installed in the bit quick-change channel 24 and can reciprocate along the length direction of the bit quick-change channel 24 to achieve the pushing installation and recovery of the bit 86, greatly improving the replacement efficiency.

[0060] A bit storage rotating cylinder 70 is sleeved on the hollow sleeve member 50 and is rotatably connected to the hollow sleeve member 50. A plurality of bit storage members 71 are provided on the bit storage rotating cylinder 70. The plurality of bit storage members 71 are circumferentially arranged in a circular array along the circumference of the bit storage rotating cylinder 70. The setting of the bit storage members 71 facilitates the storage of various specifications of bits 86 and makes basic preparations for quick selection and replacement. Bit quick-change through slots 711 are provided on the bit storage members 71.

[0061] The bit clamping mechanism 80 is movably mounted in the bit quick-change slot 711. The bit clamping mechanism 80 is clamped with a bit piece 86. The bit clamping mechanism 80 can reciprocate along the length direction close to the bit quick-change slot 711. The hollow sleeve 50 is provided with a bit insertion slot 51, which is connected to the bit quick-change channel 24. The bit storage drum 70 rotates once at equal intervals. The bit quick-change slot 711 of any bit storage piece 71 is connected to the bit placement slot 24. The insertion groove 51 corresponds directly to ensure the stability and accuracy of the bit piece 86 during the replacement process, and realizes the stable clamping and quick release of the bit. The fixed end of the bit piece 86 is installed with a first magnetic block 862, and the end of the quick-change push rod 60 away from the bit storage drum 70 is provided with a second magnetic block 63 adapted to the first magnetic block 862. Through the action of magnetic force, in conjunction with the bit clamping mechanism 80 and the quick-change push rod 60, the automatic adsorption and detachment of the bit is realized, further improving the replacement speed.

[0062] The limiting fixed sleeve member 90 is fixedly mounted on the end of the hollow sleeve member 50 away from the shell frame 10, and is used to limit the position of the bit storage drum 70 to prevent the bit storage drum 70 from position shifting during rotation, thereby ensuring the accuracy of replacing the bit piece 86. The end of the limiting fixed sleeve member 90 away from the bit storage drum 70 is clamped and installed with a push rod fixing member 91, and the end of the quick-change push rod 60 away from the bit limiting component 30 is rotatably mounted on the push rod fixing member 91. The push rod fixing member 91 provides a stable rotation fulcrum for the quick-change push rod 60, ensuring that the quick-change push rod 60 can not only meet the limit of the bit piece 86, but also does not hinder the rotation operation of the bit piece 86 after the quick change of the bit piece 86 is completed, and can rotate with the bit piece 86.

[0063] It should be noted that when installing the bit piece 86, first determine the required specifications and models of the bit piece 86, then rotate the bit storage drum 70, align the bit storage piece 71 storing the adapted model bit piece 86 with the bit insertion groove 51, press the bit clamping mechanism 80 downward, drive the bit piece 86 to pass through the bit quick-change through groove 711, and embed it in the bit insertion groove 51, then push the quick-change push rod 60, so that the bit piece 86 is separated from the bit clamping mechanism 80 and moves along the bit quick-change channel 24, and is installed at the working end of the rotating shaft core tube 20, and at the same time, the bit limiting component 30 firmly limits the bit piece 86, and the quick-change push rod 60 also tightens and limits the bit piece 86, at this time, the push rod fixing member 91 is engaged and connected with the limiting fixing sleeve member 90.

[0064] When the bit needs to be recycled, the clamping connection between the ejector rod fixing member 91 and the limit fixing sleeve member 90 is released, and the quick-change ejector rod 60 is pulled out. Under the action of the first magnetic attraction block 862 and the second magnetic attraction block 63, the bit member 86 moves with the quick-change ejector rod 60, disengages from the working end of the rotating shaft core tube 20, and moves to the bit insertion groove 51. Then, the bit clamping mechanism 80 is pressed down to clamp the bit member 86. While waiting for the bit clamping mechanism 80 to reset, the magnetic attraction connection between the quick-change ejector rod 60 and the bit member 86 is disconnected, and thus the recycling of the bit member 86 is completed.

[0065] In this embodiment, the bit limiting member 30 includes:

[0066] The mounting sleeve 31 is sleeved and mounted on the rotating shaft core tube 20 and is screwed and fixed to the rotating shaft core tube 20, realizing a stable basic mounting structure. A plurality of mounting through holes 311 are provided on the outer peripheral side of the mounting sleeve 31, and a ring-shaped limiting block 312 protrudes from one end of the mounting through hole 311 away from the housing frame 10.

[0067] The guiding pull rod 32 is movably mounted on the mounting through hole 311 and can reciprocate along the axial length direction of the mounting through hole 311, providing precise guidance and control for the limiting operation of the bit member 86. A first limiting convex block 321 protrudes from one end of the guiding pull rod 32 away from the ring-shaped limiting block 312.

[0068] The first elastic member 35 is sleeved and mounted on the guiding pull rod 32. One end of the first elastic member 35 abuts against the ring-shaped limiting block 312, and the other end abuts against the first limiting convex block 321.

[0069] The bit limiting member 33, one end of the guiding pull rod 32 away from the housing frame 10 extends out of the mounting through hole 311 and is fixedly connected to the bit limiting member 33 through the bolt fastening assembly 34.

[0070] It should be noted that the setting of the mounting through hole 311 provides an accurate position for the installation of the guiding pull rod 32. The setting of the ring-shaped limiting block 312 effectively limits the axial displacement range of the guiding pull rod 32, ensuring the stability and reliability of the movement. The cooperation between the bit limiting member 33 and the first elastic member 35 can meet the quick limiting and fixing of the bit member 86. Specifically, a hexagonal hole corresponding to the bit member 86 is provided on the bit limiting member 33, and an inclined mounting surface is provided on one side of the hexagonal hole close to the bit member 86. When the bit member 86 is pushed out from the rotating shaft core tube 20 by the quick-change ejector rod 60, if the bit member 86 is directly opposite to the hexagonal hole of the bit limiting member 33, it is directly embedded and mounted on the bit limiting member 33. If the bit member 86 is not directly opposite to the hexagonal hole, the bit member 86 first abuts against the inclined mounting surface. At this time, the first elastic member 35 is compressed and generates a reverse inclined force to squeeze the bit member 86, correcting the bit member 86 so that the bit member 86 is directly opposite to the hexagonal hole.

[0071] Among them, the bolt fastening assembly 34 includes a first bolt member 341 and a second bolt member 342. The bit limiting member 33 is arranged between the first bolt member 341 and the second bolt member 342 and is sleeved on the guiding pull rod 32. Both the first bolt member 341 and the second bolt member 342 are screwed and fixed to the guiding pull rod 32. This connection method not only enhances the fastening effect but also facilitates disassembly and maintenance when needed, improving the maintainability and service life of the tool.

[0072] The bit clamping mechanism 80 includes:

[0073] An installation guide rod 81. At one end of the bit quick-change through slot 711 close to the hollow sleeve member 50, there is also a convex annular installation protrusion 712. A plurality of installation guide rods 81 are fixedly installed on the side of the annular installation protrusion 712 away from the hollow sleeve member 50 and are equally spaced on opposite sides of the annular installation protrusion 712 to achieve the balance and stability of the structure.

[0074] A support plate member 83 is movably arranged in the bit quick-change through slot 711 and is sleeved on the installation guide rod 81. The support plate member 83 can reciprocate along the length direction of the bit quick-change through slot 711.

[0075] A second elastic member 82 is sleeved on the installation guide rod 81. One end of the second elastic member 82 abuts against the annular installation protrusion 712, and the other end abuts against the support plate member 83 to provide the ability of elastic reset.

[0076] An elastic clip 84 is installed on the side of the support plate member 83 close to the hollow sleeve member 50. At one end of the elastic clip 84 away from the support plate member 83, there is a chuck member 841. On the side of the chuck member 841 close to the housing frame 10, there is a guide inclined surface 842. On the bit member 86, there is a guide inclined slot 861 adapted to the guide inclined surface 842. This design not only enables the quick-change ejector rod 60 to smoothly push out the bit member 86 when the bit is installed but also enables the chuck member 841 to smoothly open when the bit is recycled, and under the action of the resilience of the chuck member 841, the bit member 86 is clamped and extracted.

[0077] An operation button 85 is installed on the side of the support plate member 83 away from the hollow sleeve member 50. By pressing the operation button 85, the user can easily control the movement of the support plate member 83 and the elastic clip 84 to achieve quick bit replacement. A cover 72 is also snap-fitted on the bit storage member 71. On the cover 72, there is a first avoidance through slot 721 corresponding to the operation button 85. This design not only protects the cleanliness and tidiness inside the bit storage member 71 but also ensures the smooth operation of the operation button 85, improving the overall use convenience of the tool.

[0078] Further, the frame 10 includes a first housing sleeve 11, a connecting housing sleeve 12, and a second housing sleeve 13. The first housing sleeve 11 serves as the front end portion of the frame 10 and is tightly sleeved and installed at one end of the rotating shaft core tube 20 close to the bit limiting member 30, ensuring the stability and accuracy of the operation area of the electric screwdriver. The second housing sleeve 13 is sleeved and installed at the other end of the rotating shaft core tube 20. The first housing sleeve 11 is fixedly connected to the second housing sleeve 13 through the connecting housing sleeve 12. The driving member 40 is installed on the connecting housing sleeve 12. The connecting housing sleeve 12 is provided with a first avoidance notch 121 corresponding to the conversion gear set 23, providing necessary space for the smooth operation of the conversion gear set 23 and ensuring the continuity and efficiency of power transmission. One end of the rotating shaft core tube 20 sleeved and installed on the first housing sleeve 11 further protrudes with a first rotating ring block 21. One end of the first housing sleeve 11 close to the bit limiting member 30 is provided with a second limiting convex block 111 corresponding to the first rotating ring block 21. Both sides of the first rotating ring block 21 and the second limiting convex block 111 close to each other are provided with a first guiding sliding ring groove 112. The two first guiding sliding ring grooves 112 together form a first guiding sliding channel 113. One end of the rotating shaft core tube 20 sleeved and installed on the second housing sleeve 13 further protrudes with a second rotating ring block 22. One end of the second housing sleeve 13 close to the hollow sleeve member 50 is screwed and installed with a rotating abutting block 131 corresponding to the second rotating ring block 22. Both sides of the rotating abutting block 131 and the second rotating ring block 22 close to each other are provided with a second guiding sliding ring groove 221. The two second guiding sliding ring grooves 221 together constitute a second guiding sliding channel 222. Ball bearings 14 are installed in both the first guiding sliding channel 113 and the second guiding sliding channel 222. The designs of the first guiding sliding channel 113 and the second guiding sliding channel 222 reduce the frictional resistance of the rotating shaft core tube 20 during rotation, improving the smoothness and accuracy of rotation. The introduction of the ball bearings 14 not only realizes the precise guiding and lubricating effects during the rotation of the rotating shaft core tube 20, but also effectively reduces the energy loss and noise generation during rotation through its rolling friction characteristics, enhancing the overall performance and user experience of the electric screwdriver.

[0079] One side of the rotating abutting block 131 away from the rotating shaft core tube 20 further protrudes with an operation knob 132, which is convenient for disassembly and assembly, improving the convenience and efficiency of later maintenance. The hollow sleeve member 50 is also provided with a second avoidance groove 52 corresponding to the operation knob 132, ensuring a compact structural space while avoiding component interference.

[0080] The quick-change ejector rod 60 is convexly provided with a third limiting convex block 62. As a key limiting component in the quick-change mechanism, its design aims to ensure the stable movement and precise positioning of the quick-change ejector rod 60 within the bit quick-change channel 24. The limiting fixed sleeve member 90 is convexly provided with a fourth limiting convex block 93 corresponding to the third limiting convex block 62. Through the cooperation of the two, effective axial limiting of the quick-change ejector rod 60 is achieved, preventing structural damage or functional failure caused by excessive movement. The diameter dimension of the third limiting convex block 62 is not greater than the diameter dimension of the bit quick-change channel 24, which not only ensures the smooth sliding of the quick-change ejector rod 60 within the bit quick-change channel 24 but also avoids jamming caused by oversize dimensions, improving the fluency and reliability of the quick-change operation. The straight-line distance from the third limiting convex block 62 to the second magnetic attraction block 63 is equal to the straight-line distance from one end of the bit insertion groove 51 close to the ejector rod fixing member 91 to the fourth limiting convex block 93. This precise dimensional relationship ensures that the quick-change ejector rod 60 can maintain a stable movement trajectory and accurate positioning during the process of pushing the bit into or out of the bit insertion groove 51, thereby realizing the quick and accurate replacement of the bit, improving work efficiency and operation convenience.

[0081] Furthermore, engaging and embedding grooves 94 are also provided on both sides of one end of the limiting fixed sleeve member 90 away from the bit storage rotating cylinder 70. An installation groove 95 communicating with the engaging and embedding grooves 94 is provided on the outer peripheral side wall of the limiting fixed sleeve member 90. An elastic engaging member is installed on the ejector rod fixing member 91. The elastic engaging member passes through the engaging and embedding grooves 94 and is snap-fitted and installed in the installation groove 95, simplifying the assembly process and improving the connection reliability, ensuring that the electric screwdriver will not affect its performance due to loose connection during use. A snap-fitting unlocking member 96 is also provided on the limiting fixed sleeve member 90. An unlocking convex block 961 corresponding to the installation groove 95 is installed on the snap-fitting unlocking member 96. When it is necessary to replace the bit member 86, the user only needs to operate the snap-fitting unlocking member 96 to easily release the snap-fitting state of the elastic engaging member, realize the quick disassembly of the ejector rod fixing member 91, and thus operate the quick-change ejector rod 60 to achieve the quick replacement of the bit member 86.

[0082] One end of the quick-change ejector rod 60 away from the bit limiting component 30 is also convexly provided with an installation convex post 61. The diameter of the installation convex post 61 is smaller than the diameter of the quick-change ejector rod 60. The ejector rod fixing member 91 is rotatably installed on the installation convex post 61. A limiting screwing member 92 is also installed at one end of the installation convex post 61 away from the quick-change ejector rod 60. The limiting screwing member 92 is used to limit the position of the ejector rod fixing member 91 on the installation convex post 61, ensuring the rotational connection relationship between the ejector rod fixing member 91 and the quick-change ejector rod 60.

[0083] The conversion gear set 23 includes a first drive bevel gear 231 and a second drive bevel gear 232. The first drive bevel gear 231 is meshed and connected with the second drive bevel gear 232, realizing the power transmission and speed conversion between the rotating shaft core tube 20 and the drive component 40. The first drive bevel gear 231 is installed on the rotating shaft core tube 20, and the second drive bevel gear 232 is installed on the drive end of the drive component 40. This gear transmission method not only has high transmission efficiency but also has a stable transmission ratio, ensuring the stable output performance of the electric screwdriver during the working process.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A quick-change electric screwdriver, characterized in that: include: Shell frame (10); A rotating shaft core tube (20) is rotatably mounted on the housing (10), one end of the rotating shaft core tube (20) extending out of the housing (10) and sleeved with an adjustable bit limiting component (30); A driving component (40) is arranged beside the rotating shaft core tube (20) and installed on the housing (10); a transmission end of the driving component (40) is connected to the rotating shaft core tube (20) via a conversion gear set (23); A hollow sleeve member (50) is fixedly mounted on an end of the housing (10) away from the bit limiting member (30), and together with the rotating shaft core tube (20) forms a bit quick-change channel (24); A quick-change push rod (60) is movably mounted in the bit quick-change channel (24) and can reciprocate along the length direction of the bit quick-change channel (24); A screwdriver bit storage drum (70) is sleeved and mounted on the hollow sleeve member (50) and is rotatably connected to the hollow sleeve member (50). The screwdriver bit storage drum (70) is provided with a plurality of screwdriver bit storage members (71). The plurality of screwdriver bit storage members (71) are distributed in a circumferential array along the circumferential direction of the screwdriver bit storage drum (70). The screwdriver bit storage members (71) are provided with screwdriver bit quick-change grooves (711). The bit clamping mechanism (80) is movably mounted in the bit quick-change slot (711), a bit piece (86) is clamped on the bit clamping mechanism (80), and the bit clamping mechanism (80) can reciprocate along the length direction close to the bit quick-change slot (711). The hollow sleeve member (50) is provided with a bit insertion slot (51), and the bit insertion slot (51) is communicated with the bit quick-change channel (24). The bit storage drum (70) rotates once at equal intervals, the bit quick-change slot (711) of any bit storage component (71) corresponds to the bit insertion slot (51), a first magnetic block (862) is installed at the fixed end of the bit component (86), and a second magnetic block (63) adapted to the first magnetic block (862) is provided at one end of the quick-change top rod (60) away from the bit storage drum (70); A limiting fixed sleeve member (90) is fixedly mounted on one end of the hollow sleeve member (50) away from the housing (10) and is used to limit the position of the bit storage drum (70). One end of the limiting fixed sleeve member (90) away from the bit storage drum (70) is snap-fitted with a push rod fixing member (91), and one end of the quick-change push rod (60) away from the bit limiting component (30) is rotatably mounted on the push rod fixing member (91).

2. The electric screwdriver with quick bit change according to claim 1, characterized in that: The bit limiting component (30) comprises: A mounting sleeve (31) is sleeved and mounted on the rotating shaft core tube (20) and is screwed and fixed to the rotating shaft core tube (20); a plurality of mounting through holes (311) are provided on the outer circumference of the mounting sleeve (31); an annular limit block (312) is protruded from one end of the mounting through hole (311) away from the shell frame (10); A guide rod (32) is movably mounted on the mounting through hole (311) and can reciprocate along the axial length direction of the mounting through hole (311); a first limiting protrusion (321) is convexly provided on one end of the guide rod (32) away from the annular limiting block (312); A first elastic member (35) is sleeved and mounted on the guide pull rod (32), one end of the first elastic member (35) abuts against the annular limiting block (312), and the other end abuts against the first limiting protrusion (321); A screwdriver bit limiting member (33), one end of the guide pull rod (32) away from the housing (10) extends out of the mounting through hole (311), and is fixedly connected to the screwdriver bit limiting member (33) via a bolt fastening assembly (34).

3. The electric screwdriver with quick bit change according to claim 2, characterized in that: The bolt fastening assembly (34) comprises a first bolt member (341) and a second bolt member (342); the bit limiting member (33) is arranged between the first bolt member (341) and the second bolt member (342), and is sleeved and installed on the guide pull rod (32); the first bolt member (341) and the second bolt member (342) are both screwed and fixed to the guide pull rod (32).

4. The electric screwdriver with quick bit change according to claim 1, characterized in that: The bit clamping mechanism (80) comprises: A mounting guide rod (81), an end of the screwdriver bit quick-change groove (711) close to the hollow sleeve member (50) is also provided with an annular mounting protrusion (712), and a plurality of mounting guide rods (81) are fixedly mounted on a side of the annular mounting protrusion (712) away from the hollow sleeve member (50) and are equidistantly distributed on opposite sides of the annular mounting protrusion (712); A support plate (83) is movably arranged in the bit speed change slot (711) and sleeved on the mounting guide rod (81), and the support plate (83) can reciprocate along the length direction of the bit speed change slot (711); A second elastic member (82) is sleeved and mounted on the mounting guide rod (81), one end of the second elastic member (82) abuts against the annular mounting protrusion (712), and the other end abuts against the supporting plate member (83); An elastic clip (84) is mounted on a side of the support plate (83) close to the hollow sleeve (50); a clamping piece (841) is provided at one end of the elastic clip (84) away from the support plate (83); a guide inclined surface (842) is provided on a side of the clamping piece (841) close to the shell frame (10); and a guide inclined groove (861) adapted to the guide inclined surface (842) is provided on the screwdriver bit (86); An operating button (85) is mounted on a side of the support plate (83) away from the hollow sleeve (50). A cover (72) is also mounted on the bit storage (71), and a first avoidance slot (721) corresponding to the operating button (85) is formed on the cover (72).

5. The electric screwdriver with quick bit change according to claim 1, characterized in that: The housing (10) comprises a first housing (11), a connecting housing (12) and a second housing (13); the first housing (11) is sleeved and mounted on one end of the rotating shaft core tube (20) close to the bit limiting component (30); the second housing (13) is sleeved and mounted on the other end of the rotating shaft core tube (20); the first housing (11) is fixedly connected to the second housing (13) via the connecting housing (12); the driving component (40) is mounted on the connecting housing (12); the connecting housing (12) is provided with a first avoidance notch (121) corresponding to the conversion gear set (23); one end of the rotating shaft core tube (20) sleeved and mounted on the first housing (11) is also provided with a first rotating ring block (21); one end of the first housing (11) close to the bit limiting component (30) is provided with a second limiting protrusion corresponding to the first rotating ring block (21); The first rotating ring block (21) and the second limiting protrusion (111) are provided with a first guide ring groove (112) on the side where the first rotating ring block (21) and the second limiting protrusion (111) are close to each other, and the two first guide ring grooves (112) together form a first guide channel (113); the shaft core tube (20) is sleeved and mounted on one end of the second shell (13) and is also provided with a second rotating ring block (22); the second shell (13) is screwed on one end close to the hollow sleeve (50) and is provided with a rotating abutment block (131) corresponding to the second rotating ring block (22); the rotating abutment block (131) and the second rotating ring block (22) are provided with a second guide ring groove (221) on the side where the first rotating ring block (21) and the second limiting protrusion (111) are close to each other, and the two second guide ring grooves (221) together form a second guide channel (222); and balls (14) are installed in the first guide channel (113) and the second guide channel (222).

6. The electric screwdriver with quick bit change according to claim 5, characterized in that: An operating handle (132) is also protruded from the side of the rotating abutment block (131) away from the rotating shaft core tube (20), and a second avoidance groove (52) corresponding to the operating handle (132) is also formed on the hollow sleeve member (50).

7. The electric screwdriver with quick bit change according to claim 1, characterized in that: A third limiting protrusion (62) is convexly provided on the quick-change push rod (60), and a fourth limiting protrusion (93) corresponding to the third limiting protrusion (62) is convexly provided in the limiting fixing sleeve (90), the diameter of the third limiting protrusion (62) is not greater than the diameter of the bit quick-change channel (24), and the straight-line distance from the third limiting protrusion (62) to the second magnetic attraction block (63) is equal to the straight-line distance from one end of the bit insertion groove (51) close to the push rod fixing member (91) to the fourth limiting protrusion (93).

8. The electric screwdriver with quick bit change according to claim 1, characterized in that: The limiting fixing sleeve (90) is provided with a snap-fitting groove (94) on both sides of one end away from the bit storage rotating drum (70); the outer peripheral side wall of the limiting fixing sleeve (90) is provided with a mounting groove (95) connected with the snap-fitting groove (94); the push rod fixing member (91) is provided with an elastic clamping member, the elastic clamping member is inserted into the snap-fitting groove (94) and snap-fitted on the mounting groove (95); the limiting fixing sleeve (90) is also provided with a snap-fitting unlocking member (96); the snap-fitting unlocking member (96) is provided with an unlocking protrusion (961) corresponding to the mounting groove (95).

9. The electric screwdriver with quick bit change according to claim 1, characterized in that: The end of the quick-change push rod (60) away from the bit limiting component (30) is also provided with a mounting boss (61), the diameter of the mounting boss (61) is smaller than the diameter of the quick-change push rod (60), the push rod fixing member (91) is rotatably mounted on the mounting boss (61), and the end of the mounting boss (61) away from the quick-change push rod (60) is also provided with a limiting screw connection member (92), and the limiting screw connection member (92) is used to limit the position of the push rod fixing member (91) on the mounting boss (61).

10. The electric screwdriver with quick bit change according to claim 1, characterized in that: The conversion gear set (23) comprises a first transmission bevel gear (231) and a second transmission bevel gear (232), the first transmission bevel gear (231) being meshedly connected with the second transmission bevel gear (232), the first transmission bevel gear (231) being mounted on the rotating shaft core tube (20), and the second transmission bevel gear (232) being mounted on the transmission end of the driving component (40).

Images