Electric screwdriver

Abstract

The utility model relates to an electric screwdriver, which belongs to the field of electric tools and comprises a screwdriver shell, a power supply component, a control panel and an output device. The output device comprises an output motor, an output head and a transmission assembly in transmission connection between an output shaft of the output motor and the output head, the control panel is provided with a contact switch, a trigger shaft of the contact switch is arranged towards the output device, and the output device is installed on the screwdriver shell in a sliding mode in the axis direction of the output head. The output device is provided with an opening station and a closing station, and when the output device is located at the opening station, the output device presses the trigger shaft into the contact switch; when the output device is located at the closing station, the output device is separated from the trigger shaft; the screwdriver shell is further provided with a reset spring, one end of the reset spring abuts against the output device, the other end of the reset spring abuts against the screwdriver shell, and the reset spring enables the output device to have the trend of resetting to the closing station all the time. The electric screwdriver has the effect of providing the electric screwdriver with the contact switch.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric tools, in particular to an electric screwdriver. BACKGROUND

[0002] The electric screwdriver is an electric tool used for tightening and loosening screws. The electric screwdriver mainly comprises a screwdriver shell, a power supply assembly installed on the screwdriver shell, a control board installed on the screwdriver shell, and an output device located at the front side of the power supply assembly. The control board is provided with a switch assembly, and the screwdriver shell is provided with a control button matched with the switch assembly. When the operator needs to start the electric screwdriver, the control button on the screwdriver shell needs to be pressed to start the electric screwdriver.

[0003] For the related technology in the above, the inventor provides an electric screwdriver with a touch switch. CONTENT OF THE UTILITY MODEL

[0004] In order to provide an electric screwdriver with a touch switch, the present application provides an electric screwdriver.

[0005] The electric screwdriver provided by the present application adopts the following technical scheme:

[0006] An electric screwdriver comprises a screwdriver shell, a power supply assembly installed at the tail end of the inner cavity of the screwdriver shell, a control board installed in the screwdriver shell and located at one side of the power supply assembly, and an output device located at the front side of the power supply assembly. The output device comprises an output motor, an output head, and a transmission assembly transmitting between the output shaft of the output motor and the output head. The control board is provided with a touch switch, the trigger shaft of the touch switch is arranged towards the output device, the output device is slidingly installed on the screwdriver shell along the axis direction of the output head, the output device has an opening station and a closing station, when the output device is at the opening station, the output device presses the trigger shaft into the touch switch, when the output device is at the closing station, the output device is separated from the trigger shaft. The screwdriver shell is further provided with a reset spring, one end of the reset spring abuts against the output device and the other end abuts against the screwdriver shell, and the reset spring makes the output device always have a tendency to reset to the closing station.

[0007] By adopting the technical scheme, in the working process of the electric screwdriver, an operator presses down the output head of the electric screwdriver, so that the output device slides towards the power supply assembly; when the output device presses the trigger shaft into the contact switch, the power supply assembly provides power for the output switch, so that the output motor starts to work, and the transmission assembly is driven to make the output head tighten or loosen the screw; when the operator stops pressing down the output head of the electric screwdriver, the reset spring makes the output device quickly reset to the state of the closing station, so that the work of the electric screwdriver is stopped; the contact switch helps to improve the working efficiency of the electric screwdriver and improve the use safety of the electric screwdriver.

[0008] Optionally, the number of the contact switches is two, and the two contact switches are arranged on the control panel.

[0009] By adopting the technical scheme, the arrangement of the two contact switches and the arrangement of the two contact switches on the control panel make the output device more stably trigger or release the contact switch during movement, which helps to reduce the possibility of misoperation.

[0010] Optionally, the screwdriver shell comprises an outer shell and an inner shell, the top of the inner shell has a mounting convex ring extending towards the outer shell, and the bottom surface of the inner shell is provided with a mounting seat, the inner wall of the outer shell has an abutting convex part for the bottom surface of the mounting convex ring to abut against, and the inner shell and the outer shell are fixed by screw connection.

[0011] By adopting the technical scheme, the cooperation between the mounting convex ring on the inner shell and the abutting convex part on the outer shell and the connection and fixation of the outer shell and the inner shell through the screw help to improve the installation stability of the inner shell in the inner cavity of the outer shell and reduce the probability of loosening of the inner shell during operation of the electric screwdriver.

[0012] Optionally, the power supply assembly is arranged in the inner shell, the inner shell has a first limiting plate arranged on the top surface of the power supply assembly, a second limiting plate arranged on the bottom surface of the power supply assembly, and a third limiting plate abutting against the outer wall of the power supply assembly, the third limiting plate has a limiting surface abutting against the outer wall of the power supply assembly and a supporting surface for supporting the control panel, and the bottom of the inner shell is provided with a plug-in slot for plug-in of the control panel.

[0013] By adopting the technical scheme, the arrangement of the first limiting plate, the second limiting plate and the third limiting plate makes the power supply assembly stably fixed in the inner shell, and reduces the probability of movement of the power supply assembly during operation. The arrangement of the plug-in slot on the inner shell and the arrangement of the supporting surface on the third limiting plate provide a stable mounting platform for the control panel in the inner shell.

[0014] Optionally, the transmission assembly comprises a transmission sleeve, an inner tooth sleeve rotatably mounted on the transmission sleeve, a first gear frame mounted on the inner tooth sleeve, and a second gear frame mounted on the top surface of the first gear frame; the first gear frame and the second gear frame are in meshing engagement with the tooth surface of the inner tooth sleeve.

[0015] By adopting the above technical scheme, the specific structure of the transmission assembly is disclosed, and in the operation process of the electric screwdriver, the transmission assembly is connected with the output shaft of the output motor, the first gear frame and the second gear frame are driven to rotate and cooperate with the inner tooth sleeve, so as to drive the output head to rotate, and the tightening or loosening action of the screw is realized.

[0016] Optionally, the bottom of the transmission sleeve is provided with a mounting hole for threadedly connecting with the output motor; the outer wall of the transmission sleeve has a limiting protruding ring extending towards the direction of the screwdriver shell, one end of the reset spring abuts against the limiting protruding ring and the other end abuts against the mounting protruding ring.

[0017] By adopting the above technical scheme, the transmission assembly and the output motor are synchronously slid by the screw connection of the transmission sleeve and the output motor. The setting that one end of the reset spring abuts against the limiting protruding ring and the other end abuts against the mounting protruding ring helps to drive the transmission assembly and the output motor to always have the tendency of being in the closed position.

[0018] Optionally, the output device further comprises a torque adjusting mechanism arranged between the transmission assembly and the output head, the torque adjusting mechanism comprising an adjusting seat arranged on the top surface of the transmission sleeve, a driving ring sleeved on the adjusting seat, and an adjusting assembly sleeved on the adjusting seat and located at the bottom end of the driving ring; the outer side wall of the adjusting seat has a threaded structure, and the driving ring has a sliding protruding ring matched with the threaded structure, so that the driving ring can be in rotational cooperation with the adjusting seat along the threaded structure.

[0019] By adopting the above technical scheme, the specific structure of the torque adjusting mechanism is disclosed, and in the working process of the electric screwdriver, the driving ring presses down the adjusting assembly by the cooperation of the threaded structure on the adjusting seat and the sliding protruding ring on the driving ring, so that the adjusting assembly abuts against the top surface of the inner tooth sleeve, thereby limiting the action of the inner tooth sleeve and achieving the purpose of increasing the torque.

[0020] Optionally, the driving ring has a driving protruding block extending towards the direction of the screwdriver shell, the screwdriver shell has a locking groove for arranging the driving protruding block, and the screwdriver shell is provided with a locking block abutting against the top surface of the driving protruding block on the top surface of the locking groove.

[0021] By adopting the technical scheme, the relative position between the driving ring and the screwdriver shell is fixed through cooperation between the locking groove and the driving protrusion, so that the rotation of the driving ring can be driven when the screwdriver shell is rotated by the operator, thereby the torque is adjusted, and the adjustment mode is relatively quick and convenient.

[0022] Optionally, the adjusting seat has a mounting portion and a driving portion connected to the top surface of the mounting portion, and the outer diameter of the driving portion is smaller than that of the mounting portion; the adjusting assembly comprises an adjusting ring arranged at the bottom end of the driving ring, a spring washer arranged at the top surface of the mounting portion, an adjusting spring connected to the adjusting ring and the spring washer, and an abutting column abutting against the bottom surface of the spring washer, and the other end of the abutting column abuts against the inner tooth sleeve.

[0023] By adopting the technical scheme, the specific structure of the adjusting assembly is disclosed, when the driving ring rotates downward, the driving adjusting ring is pressed downward to increase the pressure of the abutting column abutting against the inner tooth sleeve, thereby the rotation of the inner tooth sleeve is limited, and flexible adjustment of the increased torque is realized.

[0024] Optionally, the bottom of the adjusting seat is provided with an arrangement groove for arranging the adjusting spring, and the top surface of the arrangement groove is provided with a guide column extending towards the spring washer and used for guiding the adjusting spring.

[0025] By adopting the technical scheme, the arrangement groove and the guide column in the arrangement groove are arranged, which helps to guide the pressing of the adjusting spring, guarantees the linear motion of the adjusting spring in the compression and release process, and improves the adjustment accuracy and response speed.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. An electric screwdriver, when the output device presses the trigger shaft into the contact switch, the power supply assembly provides power for the output switch, so that the output motor starts to work, and through the transmission of the transmission assembly, the output head tightens or loosens the screw, when the operator stops pressing the output head of the electric screwdriver, the existence of the reset spring makes the output device quickly reset to the state of the closed station, so as to stop the work of the electric screwdriver.

[0028] 2. Through cooperation between the mounting protrusion on the inner housing and the abutting protrusion on the outer housing, and connection and fixation of the outer housing and the inner housing through screws, the installation stability of the inner housing in the inner cavity of the outer housing is improved, and the probability of loosening of the inner housing during operation of the electric screwdriver is reduced.

[0029] 3. The arrangement groove and the guide column in the arrangement groove are arranged, which helps to guide the pressing of the adjusting spring, guarantees the linear motion of the adjusting spring in the compression and release process, and improves the adjustment accuracy and response speed. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of an electric screwdriver in an embodiment of this application.

[0031] Figure 2 This is a cross-sectional schematic diagram of the electric screwdriver in the embodiments of this application.

[0032] Figure 3 This is a schematic diagram of the inner shell cooperating with the power supply component and control board in an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the contact switch and the output motor in an embodiment of this application.

[0034] Figure 5 yes Figure 2 A magnified view of a portion of point A in the middle.

[0035] Figure 6 This is a schematic diagram of the cooperation between the transmission component and the torque adjustment mechanism in an embodiment of this application.

[0036] Figure 7 This is a schematic diagram of the torque adjustment mechanism in an embodiment of this application.

[0037] Figure 8 This is a schematic diagram of the upper shell in an embodiment of this application.

[0038] Figure 9 This is a partial cross-sectional schematic diagram of the engagement between the abutment post, the inner toothed sleeve, and the spring washer in an embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the adjusting ring in an embodiment of this application.

[0040] Explanation of reference signs: 1, screwdriver shell; 11, outer shell; 111, abutting convex part; 112, upper shell; 113, lower shell; 114, middle shell; 12, inner shell; 121, mounting convex ring; 122, mounting seat; 123, left shell; 1231, clamping through slot; 124, right shell; 1241, clamping seat; 125, first limiting plate; 126, second limiting plate; 127, third limiting plate; 1271, limiting surface; 1272, supporting surface; 128, insertion slot; 129, locking slot; 1291, locking block; 2, power supply assembly; 3, control panel; 31, contact switch; 311, trigger shaft; 32, control switch; 33, steering knob; 4, output motor; 5, output head; 6, transmission assembly; 61, transmission sleeve; 612, mounting hole; 613, limiting convex ring; 614, mounting key block; 62, inner tooth sleeve; 621, first gear carrier; 622, second gear carrier; 623, supporting flange; 7, torque adjustment mechanism; 71, adjustment seat; 711, mounting portion; 7111, mounting through hole; 712, driving portion; 72, driving ring; 721, sliding convex ring; 722, driving convex block; 73, adjustment assembly; 731, adjustment ring; 7311, arrangement slot; 7312, guide column; 732, spring washer; 733, adjustment spring; 734, abutting column; 8, reset spring. DETAILED DESCRIPTION

[0041] The following will be described in detail with reference to the accompanying drawings. Figures 1-10 The present application is further described in detail.

[0042] The present application discloses an electric screwdriver. Referring to Figure 1 and Figure 2 An electric screwdriver comprises a screwdriver shell 1, a power supply assembly 2 mounted at the tail end of the inner cavity of the screwdriver shell 1, a control panel 3 mounted on the screwdriver shell 1 and located on one side of the power supply assembly 2, and an output device located in front of the power supply assembly 2.

[0043] Referring to Figure 1 and Figure 2 The screwdriver shell 1 comprises an outer shell 11 and an inner shell 12 arranged in the inner cavity of the outer shell 11. The top of the inner shell 12 has a mounting convex ring 121 extending towards the outer shell 11, and the bottom of the inner shell 12 is provided with a mounting seat 122. The inner wall of the outer shell 11 has an abutting convex part 111 for abutting the mounting convex ring 121. The outer shell 11 and the inner shell 12 are connected and fixed by screws on the mounting seat 122. The outer shell 11 comprises an upper shell 112, a lower shell 113, and a middle shell 114 connecting the upper shell 112 and the lower shell 113.

[0044] Referring to Figure 3The inner housing 12 comprises a left housing 123 and a right housing 124. The left housing 123 and the right housing 124 are connected by a clamping structure, which comprises a clamping seat 1241 connected to the right housing 124 and extending towards the left housing 123, and a clamping through slot 1231 provided on the left housing 123 and used for arranging the clamping seat 1241.

[0045] With reference to Figure 2 and Figure 3 , the power supply assembly 2 is arranged in the inner housing 12. The inner housing 12 has a first limiting plate 125 arranged on the top surface of the power supply assembly 2, a second limiting plate 126 arranged on the bottom surface of the power supply assembly 2, and a third limiting plate 127 abutting against the outer wall of the power supply assembly 2. The third limiting plate 127 has a limiting surface 1271 abutting against the outer wall of the power supply assembly 2. The inner housing 12 also has a gap for arranging the control board 3. The inner housing 12 has a plug-in slot 128 for plug-in of the control board 3, and the third limiting plate 127 has a supporting surface 1272 for supporting the control board 3. In the embodiment, two third limiting plates 127 are arranged on the inner housing 12 in an axial direction.

[0046] With reference to Figure 3 , the control board 3 has a contact switch 31, and the triggering shaft 311 of the contact switch 31 is arranged towards the output device so as to cooperate with the output device. The number of the contact switch 31 is two, and the two contact switches 31 are arranged on the side of the control board 3 away from the power supply assembly 2. The control board 3 is also provided with a control switch 32 for manually starting the electric screwdriver and a steering knob 33 for steering the electric screwdriver on the side provided with the contact switch 31.

[0047] With reference to Figure 2 and Figure 4 , the output device comprises an output motor 4, an output head 5, a transmission assembly 6 connected to the output shaft of the output motor 4, and a torque adjusting mechanism 7 connecting the transmission assembly 6 and the output head 5. The output device is slidingly installed on the screwdriver housing 1 along the axial direction of the output head 5, and the output device has an opening position and a closing position. When the output device is in the opening position, the output device presses the triggering shaft 311 into the contact switch 31; when the output device is in the closing position, the output device is separated from the triggering shaft 311.

[0048] With reference to Figure 5 , the transmission assembly 6 comprises a transmission sleeve 61, an inner tooth sleeve 62 slidingly installed on the transmission sleeve 61, a first gear frame 621 installed on the inner tooth sleeve 62, and a second gear frame 622 installed on the top surface of the first gear frame 621. The first gear frame 621 and the second gear frame 622 are engaged with the tooth surface of the inner tooth sleeve 62. The inner tooth sleeve 62 has a supporting flange 623 abutting against the top end of the transmission sleeve 61.

[0049] With reference toFigure 2 and Figure 5 The outer wall of the transmission sleeve 61 has a limiting convex ring 613 extending towards the screwdriver shell 1, and the screwdriver shell 1 is further provided with a reset spring 8 at the transmission assembly 6 and the driving motor. One end of the reset spring 8 abuts against the bottom surface of the limiting convex ring 613, and the other end abuts against the top surface of the mounting convex ring 121 of the inner shell 12. The reset spring 8 is arranged so that the output device always has a tendency to reset to the closed working position.

[0050] With reference to Figure 5 and Figure 6 The torque adjusting mechanism 7 is in transmission connection with the transmission assembly 6. The torque adjusting mechanism 7 comprises an adjusting seat 71 arranged at the top end of the transmission sleeve 61, a driving ring 72 sleeved on the adjusting seat 71, and an adjusting assembly 73 sleeved on the adjusting seat 71 and located at the bottom end of the driving ring 72. The adjusting seat 71 has a mounting portion 711 connected with the transmission sleeve 61 and a driving portion 712 connected to the top surface of the mounting portion 711, and the outer diameter of the driving portion 712 is smaller than that of the mounting portion 711. The bottom of the mounting portion 711 abuts against the top surface of the limiting convex ring 613 of the transmission sleeve 61, and the transmission sleeve 61 and the adjusting seat 71 are connected and fixed by the mounting key block 614.

[0051] With reference to Figure 7 and Figure 8 The adjusting seat 71 has a threaded structure at the driving portion 712, and the inner diameter of the driving ring 72 has a sliding convex ring 721 matched with the threaded structure. The driving ring 72 further has a driving convex block 722 extending towards the upper shell 112, the inner wall of the upper shell 112 has a locking groove 129 for arranging the driving convex block 722, and the upper shell 112 is provided with a locking block 1291 at the top surface of the locking groove 129 for abutting against the top surface of the driving convex block 722, so that the rotation of the screwdriver shell 1 at the corresponding part of the torque adjusting mechanism 7 can drive the rotation of the driving ring 72 on the adjusting seat 71.

[0052] With reference to Figure 7 and Figure 9 The adjusting assembly 73 comprises an adjusting ring 731 arranged at the bottom end of the driving ring 72, a spring washer 732 arranged at the top surface of the mounting portion 711, an adjusting spring 733 connecting the adjusting ring 731 and the spring washer 732, and an abutting column 734 abutting against the bottom surface of the spring washer 732. The mounting portion 711 is further provided with a mounting through hole 7111 for the abutting column 734 to pass through, so that the other end of the abutting column abuts against the top surface of the support flange 623 of the inner tooth sleeve 62. In this embodiment, the number of abutting columns 734 is three, and the three abutting columns 734 are arranged at the top surface of the support flange 623 in circumferential direction.

[0053] With reference to Figure 7 and Figure 10The bottom of the adjusting seat 71 is provided with a arranging groove 7311 for arranging the adjusting spring 733, and the top surface of the arranging groove 7311 is provided with a guide column 7312 extending towards the spring washer 732 and used for guiding the adjusting spring 733. When the operator rotates the screwdriver bit shell 1 at the corresponding position of the torque adjusting mechanism 7 clockwise, the rotation of the screwdriver bit shell 1 drives the rotation of the driving ring 72, so that the driving ring 72 rotates downwards along the threaded structure on the adjusting seat 71, thereby driving the adjusting ring 731 to press downwards so that the acting force between the abutting column 734 and the inner tooth sleeve 62 increases, thereby limiting the rotation of the inner tooth sleeve 62, and the torque of the electric screwdriver is adjusted. In the embodiment, the bottom of the adjusting ring 731 is uniformly and circumferentially provided with six adjusting springs 733.

[0054] The implementation principle of the electric screwdriver is as follows: in the use process of the electric screwdriver, the operator presses the output head 5 of the electric screwdriver against the screw to be tightened or loosened, and the output device slides towards the power supply assembly 2 after the output head 5 is pressed downwards. When the output device presses the trigger shaft 311 of the contact switch 31 into the contact switch 31, the power supply assembly 2 is in communication with the driving motor, so that the output device is in the open position, the driving motor drives the transmission assembly 6 to drive, so that the output head 5 tightens or loosens the screw. When the operator stops pressing the output head 5, the reset spring 8 quickly resets the output device to the closed position, so that the output device is separated from the trigger shaft 311 of the contact switch 31, thereby stopping the operation of the electric screwdriver. The contact switch 31 arranged in the electric screwdriver helps to improve the working efficiency of the electric screwdriver and improves the use safety of the electric screwdriver.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A power screwdriver, comprising a screwdriver housing (1), a power supply assembly (2) mounted at the tail end of the inner cavity of the screwdriver housing (1), a control board (3) mounted in the screwdriver housing (1) and located at one side of the power supply assembly (2), and an output device located at the front side of the power supply assembly (2); the output device comprises an output motor (4), an output head (5), and a transmission assembly (6) in transmission connection between the output shaft of the output motor (4) and the output head (5), characterized in that, The control plate (3) is provided with a contact switch (31), a trigger shaft (311) of the contact switch (31) is arranged towards the output device, the output device is slidingly installed along the axial direction of the output head (5) on the screwdriver shell (1), the output device has an opening position and a closing position, when the output device is in the opening position, the output device presses the trigger shaft (311) into the contact switch (31); when the output device is in the closing position, the output device is separated from the trigger shaft (311); the screwdriver shell (1) is further provided with a reset spring (8), one end of the reset spring (8) abuts against the output device and the other end abuts against the screwdriver shell (1), the reset spring (8) makes the output device always have a tendency to reset to the closing position.

2. The electric screwdriver according to claim 1, wherein The number of the contact switches (31) is two, and the two contact switches (31) are arranged on the control plate (3) in a left-right manner.

3. The electric screwdriver according to claim 1, wherein The screwdriver shell (1) comprises an outer shell (11) and an inner shell (12), the top of the inner shell (12) is provided with a mounting convex ring (121) extending towards the outer shell (11), the bottom surface of the inner shell (12) is provided with a mounting seat (122), the inner wall of the outer shell (11) is provided with an abutting convex part (111) for abutting against the bottom surface of the mounting convex ring (121), and the inner shell (12) and the outer shell (11) are fixed by screw connection.

4. The electric screwdriver according to claim 3, wherein The power supply assembly (2) is arranged on the inner shell (12), the inner shell (12) is provided with a first limiting plate (125) arranged on the top surface of the power supply assembly (2), a second limiting plate (126) arranged on the bottom surface of the power supply assembly (2), and a third limiting plate (127) abutting against the outer wall of the power supply assembly (2), the third limiting plate (127) is provided with a limiting surface (1271) abutting against the outer wall of the power supply assembly (2) and a supporting surface (1272) for supporting the control plate (3), and the bottom of the inner shell (12) is provided with a plug-in groove (128) for plug-in connection of the control plate (3).

5. The electric screwdriver according to claim 3, wherein The transmission assembly (6) comprises a transmission sleeve (61), an inner tooth sleeve (62) rotatably installed on the transmission sleeve (61), a first gear frame (621) installed on the inner tooth sleeve (62), and a second gear frame (622) installed on the top surface of the first gear frame (621); the first gear frame (621) and the second gear frame (622) are in meshing engagement with the tooth surface of the inner tooth sleeve (62).

6. The electric screwdriver according to claim 5, wherein The bottom of the transmission sleeve (61) is provided with a mounting hole (612) for screw connection with the output motor (4); the outer wall of the transmission sleeve (61) is provided with a limiting convex ring (613) extending towards the screwdriver shell (1), one end of the reset spring (8) abuts against the limiting convex ring (613) and the other end abuts against the mounting convex ring (121).

7. The electric screwdriver according to claim 5, wherein The output device further comprises a torque adjusting mechanism (7) arranged between the transmission assembly (6) and the output head (5), the torque adjusting mechanism (7) comprising an adjusting seat (71) arranged on the top surface of the transmission sleeve (61), a driving ring (72) sleeved on the adjusting seat (71), and an adjusting assembly (73) sleeved on the adjusting seat (71) and located at the bottom end of the driving ring (72); the outer side wall of the adjusting seat (71) has a threaded structure, the driving ring (72) has a sliding convex ring (721) matched with the threaded structure, so that the driving ring (72) can be rotationally matched with the adjusting seat (71) along the threaded structure.

8. The electric screwdriver according to claim 7, wherein The driving ring (72) has a driving convex block (722) extending towards the screwdriver shell (1), the screwdriver shell (1) has a locking groove (129) for arranging the driving convex block (722), and the screwdriver shell (1) is provided with a locking block (1291) on the top surface of the locking groove (129) and abutting against the top surface of the driving convex block (722).

9. The electric screwdriver according to claim 7, wherein The adjusting seat (71) has a mounting portion (711) and a driving portion (712) connected to the top surface of the mounting portion (711), and the outer diameter of the driving portion (712) is smaller than that of the mounting portion (711); the adjusting assembly (73) comprises an adjusting ring (731) arranged at the bottom end of the driving ring (72), a spring washer (732) arranged on the top surface of the mounting portion (711), an adjusting spring (733) connected to the adjusting ring (731) and the spring washer (732), and an abutting column (734) abutting against the bottom surface of the spring washer (732), and the other end of the abutting column (734) abutting against the top surface of the inner tooth sleeve (62).

10. The electric screwdriver according to claim 9, wherein The bottom of the adjusting seat (71) is provided with an arrangement groove (7311) for arranging the adjusting spring (733), and the top surface of the arrangement groove (7311) has a guide column (7312) extending towards the spring washer (732) and used for guiding the adjusting spring (733).

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