Electric screw driver with automatic stop function after screwing
By combining a brushless motor and a Hall effect switch system, the electric screwdriver can automatically stop after tightening, solving the problem of waiting for the electric screwdriver to stop after tightening, thus improving work efficiency and torque accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-10
AI Technical Summary
Existing electric screwdrivers require a waiting period after tightening screws before gradually stopping, increasing operational complexity and wasting time, especially when rapidly completing a large number of screw tightening tasks, resulting in low efficiency.
The drive shaft is driven by a brushless motor, and through a stop shaft and Hall switch system, when the screw is tightened, the rotating shaft is subjected to tightening force. The stop shaft pushes and squeezes to stop the wine glass, triggering the Hall switch to stop the rotation of the brushless motor, thus realizing the self-stop function after tightening.
It avoids the extra time spent waiting for the screwdriver to stop, improves the simplicity of operation and work efficiency, reduces problems caused by insufficient or excessive torque, and enhances torque accuracy and practicality.
Smart Images
Figure CN223981751U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screwdriver self -stop technical field especially, it relates to a kind of electric screwdriver with tightening after self -stop function. BACKGROUND
[0002] Electric screwdriver, also known as electric driver, is a kind of hand-held electric tool using electric motor to generate rotary power to complete the locking or dismounting of screw, its working principle is to drive motor to generate rotary power by compressed air or electric energy, and then drive screwdriver bit to rotate, complete the tightening or loosening operation of screw.
[0003] Ensure that electric screwdriver has no obvious damage, battery power is sufficient, and the required screwdriver bit is intact, before operation, it is recommended to wear safety glasses and gloves and other protective equipment, according to the size and shape of screw, select appropriate screwdriver bit, and install it correctly on electric screwdriver, according to the specification and requirement of screw to be tightened or loosened, adjust the torque value of electric screwdriver, according to the required rotation direction of electric screwdriver, press the start switch of electric screwdriver, and adjust the pressing force to control the rotation speed according to the requirement, align the screwdriver bit of electric screwdriver with the slot of screw, then slowly press down electric screwdriver to make it fit with screw port, then press the rear pressing switch of electric screwdriver to start working, slowly move electric screwdriver until screw is completely fixed, after operation, turn off the power switch of electric screwdriver in time.
[0004] But the existing electric screwdriver will continue to make click sound or slight vibration after the torque reaches the preset value, and then gradually stop, so users need additional time and effort to wait for it to stop, which increases the complexity of operation, and users will waste time in the process of waiting for it to stop, especially in the case of needing to complete a large number of screw tightening work quickly, this time waste is particularly significant, which reduces work efficiency. CONTENT OF THE UTILITY MODEL
[0005] (I) Technical problem solved
[0006] The problem that electric screwdriver needs to wait for a period of time to gradually stop when tightening screw is solved, which avoids wasting time in the working process and improves work efficiency.
[0007] (II) Technical scheme
[0008] In view of the above problems of screwdriver self-stop, the utility model is proposed.
[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an electric screwdriver with a self-stop function after tightening, including a drive shaft, a stop shaft disc-2 fixedly connected to the outer wall of the drive shaft, a squeeze stop glass slidably connected to the inner wall of the drive shaft, a glass ball slidably connected to the outer wall of the squeeze stop glass and slidably connected to the inner wall of the stop shaft disc-2, a switch guide rod installed on the outer wall of the squeeze stop glass, a ceramic contact slidably connected to the outer wall of the switch guide rod, a torque adjustment ring installed on the outer wall of the drive shaft, four torque adjustment rods arranged in a circular array slidably connected to the inner wall of the torque adjustment ring, a lower pagoda bearing fixedly connected to the outer wall of the lower pagoda bearing, and an upper pagoda bearing slidably connected to the outer wall of the drive shaft.
[0010] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, wherein: a ceramic striker is fixedly connected to the outer wall of the switch guide rod, a reduced striker is fixedly connected to the outer wall of the ceramic striker and is fixedly connected to the outer wall of the squeeze stop glass, a stop shaft-1 is slidably connected to the outer wall of the drive shaft, a jump-off steel ball is slidably connected to the top of the stop shaft disc-2, and a spring top shaft-2 is slidably connected to the outer wall of the drive shaft.
[0011] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to the present invention, wherein: the outer wall of the spring top shaft-2 is connected to the bottom end of the stop shaft disc-2, the inner wall of the torque adjustment ring is threaded with a lower clutch sleeve that is slidably connected to the outer wall of the torque adjustment rod, the outer wall of the lower pagoda bearing- is fixedly connected to the upper pagoda bearing-, and the top end of the upper pagoda bearing- is connected to the outer wall of the spring top shaft-2 with a spring.
[0012] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to the present invention, wherein: the top end of the lower pagoda bearing is slidably connected to the inner wall of the upper pagoda bearing, the outer wall of the lower pagoda bearing is slidably connected to a retaining spring, the inner wall of the lower clutch cylinder is slidably connected to a bearing that is slidably connected to the outer wall of the drive shaft, and the outer wall of the lower clutch cylinder is threadedly sleeved with an upper clutch cylinder.
[0013] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, the inner wall of the drive shaft is slidably connected to a pressing spring C-ring, the outer wall of the drive shaft is slidably connected to two screwdriver bit cap steel balls that are distributed in a mirror image, the outer wall of the screwdriver bit cap steel balls is slidably connected to a pressing spring that is slidably connected to the outer wall of the pressing spring C-ring, and a return spring is connected between the outer wall of the pressing spring and the outer wall of the bearing.
[0014] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, the lower clutch cylinder is slidably connected to the outer wall of the lower clutch cylinder, the inner wall of the front locking ring is slidably connected to the component support lower housing, the outer wall of the component support lower housing is fixedly connected to the outer housing on the trademark surface, the inner wall of the front locking ring is threaded with two evenly distributed screws, and the outer wall of the switch guide rod is slidably connected to a brushless motor.
[0015] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, the brushless motor has a motor main gear / slow speed / fast speed slidably connected to its outer wall, a planetary gear meshing with the outer wall of the motor main gear / slow speed / fast speed, a gear shaft fixedly connected to the inner wall of the planetary gear, a gear disc slidably connected to the outer wall of the gear shaft and slidably connected to the outer wall of the stop shaft-1, a shim cylinder slidably connected to the outer wall of the stop shaft-1, and a pressure spring cover meshing with the outer wall of the planetary gear.
[0016] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, the bottom end of the raised cylinder is slidably connected to a clutch main bearing that is slidably connected to the outer wall of the stop rotating shaft-1, the inner wall of the outer shell on the trademark surface is fixedly connected to a pressing main shaft, the outer wall of the pressing main shaft is slidably connected to a forward rotation contact pressing, and the outer wall of the forward rotation contact pressing is slidably connected to a forward rotation contact switch.
[0017] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, wherein: a circuit board is installed on the inner wall of the outer shell on the trademark surface, a push rod cover plate is slidably connected to the outer wall of the circuit board, a circuit board interference body is fixedly installed on the outer wall of the push rod cover plate, a circuit board receiving groove is opened at the top of the push rod cover plate, a Hall switch is fixedly connected to the outer wall of the ceramic contact, and a stop micro switch is slidably connected to the outer wall of the Hall switch.
[0018] As a preferred embodiment of the electric screwdriver with a self-stop function after tightening according to this utility model, wherein: a reverse contact switch is installed on the inner wall of the outer shell on the trademark surface, a reverse pressing contact switch is slidably connected to the outer wall of the reverse contact switch, a three-core aviation plug is installed on the inner wall of the outer shell on the trademark surface, an LED bead is fixedly installed on the outer wall of the lower shell of the component support, and a copper insert is fixedly connected to the inner wall of the lower shell of the component support.
[0019] The beneficial effects of this utility model are:
[0020] 1. The brushless motor drives the transmission shaft to operate the screwdriver. When the screw is tightened, the rotating shaft is subjected to a tightening force. The stop shaft-1 pushes and squeezes the stop glass, which drives the switch guide rod to trigger the Hall switch, stopping the rotation of the brushless motor. This achieves the function of automatically stopping after tightening, avoiding the need for extra time to wait for the screwdriver to stop. The operation is simple and improves the user's work efficiency.
[0021] 2. By rotating the torque adjustment ring, the pagoda bearing is driven to compress the spring. The spring is stressed, which increases the transmitted torque. The torque can be flexibly adjusted, allowing operators to quickly set the required torque value, saving time from repeated trials and adjustments. This improves the stability of torque accuracy and avoids problems caused by insufficient or excessive torque, further improving work efficiency. In addition, the pagoda bearing has internal ball bearings, which reduce friction with the drive shaft and improve practicality. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0024] Figure 2 This is a schematic diagram of the overall internal cross-sectional structure of this utility model.
[0025] Figure 3 This is a schematic diagram of the installation structure of the brushless motor of this utility model.
[0026] Figure 4 This is a schematic diagram of the circuit board mounting structure of this utility model.
[0027] Figure 5 This is a schematic diagram of the overall structure of the stop shaft disc-2 of this utility model.
[0028] Explanation of reference numerals in the attached diagram: 1. Pressing circlip C-ring; 2. Pressing circlip; 3. Drive shaft; 4. Screwdriver tip cap ball; 5. Wine glass ball; 6. Release ball; 7. Torque adjusting ring; 8. Torque adjusting rod; 9. Lower clutch cylinder; 10. Bearing; 11. Lower pagoda bearing; 12. Circlip; 13. Ball bearing; 14. Upper pagoda bearing; 15. Spring; 16. Spring top shaft - 2; 17. Spring top shaft - 1; 18. Stop shaft disc - 2; 19. Stop rotating shaft - 1; 20. Clutch main bearing; 21. Elevating cylinder; 22. Screw; 23. Front lock ring; 24. Upper clutch cylinder; 25. Gear disc; 26. Gear shaft; 27. Planetary gear; 2 8. Press-down spring cover; 29. Motor main gear / slow / fast; 30. Squeeze-off wine glass; 31. Shrinking striker; 32. Ceramic striker; 33. Switch guide rod; 34. Brushless motor; 35. Ceramic contact; 36. Forward rotation contact switch; 37. Press plate spindle; 38. Forward rotation contact press plate; 39. Outer shell on trademark surface; 40. Circuit board receiving groove; 41. Circuit board interference body; 42. Push rod cover plate; 43. Hall switch; 44. Stop micro switch; 45. Circuit board; 46. Reverse press contact switch; 47. Reverse contact switch; 48. Three-pin aviation plug; 49. LED bead; 50. Copper inlay; 51. Component carrier lower shell. Detailed Implementation
[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0030] Example 1
[0031] Reference Figures 1-5This first embodiment of the present invention provides an electric screwdriver with a self-stop function after tightening. It includes a drive shaft 3. The outer wall of the drive shaft 3 has multiple through holes for sliding connection of screwdriver bit cap steel balls 4, wine glass steel balls 5, and ejector steel balls 6. A stop shaft disc -218 is fixedly connected to the outer wall of the drive shaft 3. The inner wall of the stop shaft disc -218 has an inclined surface for pressing the wine glass steel balls 5. A stop-press wine glass 30 is slidably connected to the inner wall of the drive shaft 3. The stop-press wine glass 30 is used to push the shrinking striker 31. The outer wall of the stop-press wine glass 30 is slidably connected to the wine glass steel balls 5, which are slidably connected to the inner wall of the stop shaft disc -218. The wine glass steel balls 5 are used to push the stop-press wine glass 30, pressing... A switch guide rod 33 is installed on the outer wall of the disabling wine glass 30. The switch guide rod 33 is used to trigger the Hall switch 43. A ceramic contact 35 is slidably connected to the outer wall of the switch guide rod 33. The ceramic contact 35 reduces friction and increases lifespan. A torque adjustment ring 7 is installed on the outer wall of the drive shaft 3. The inner wall of the torque adjustment ring 7 has multiple grooves arranged in a circular array. Four torque adjustment rods 8 arranged in a circular array are slidably connected to the inner wall of the torque adjustment ring 7. The torque adjustment rods 8 are used to push the pagoda bearing-lower 11. The outer wall of the torque adjustment rod 8 is fixedly connected to the pagoda bearing-lower 11. The outer wall of the pagoda bearing-lower 11 is slidably connected to the pagoda bearing-upper 14, which is slidably connected to the outer wall of the drive shaft 3.
[0032] A ceramic striker 32 is fixedly connected to the outer wall of the switch guide rod 33. The ceramic striker 32 is used to reduce the friction between the shrinking striker 31 and the switch guide rod 33. The shrinking striker 31, which is fixedly connected to the outer wall of the squeeze stop glass 30, is fixedly connected to the outer wall of the ceramic striker 32. A stop shaft-119 is slidably connected to the outer wall of the drive shaft 3. The outer wall of the stop shaft-119 is provided with a protrusion to facilitate the squeeze release of the steel ball 6. The release steel ball 6, which is slidably connected to the top of the stop shaft disc-218, is slidably connected to the outer wall of the stop shaft-119. A spring top shaft-216 is slidably connected to the outer wall of the drive shaft 3.
[0033] The outer wall of the brushless motor 34 is slidably connected to a motor main gear / slow speed / fast speed 29. A planetary gear 27 meshes with the outer wall of the motor main gear / slow speed / fast speed 29. A gear shaft 26 is fixedly connected to the inner wall of the planetary gear 27. A gear disk 25 is slidably connected to the outer wall of the gear shaft 26 and is slidably connected to the outer wall of the stop shaft-119. A shim cylinder 21 is slidably connected to the outer wall of the stop shaft-119. A pressure spring cover 28 meshes with the outer wall of the planetary gear 27. The pressure spring cover 28 is used to drive the stop shaft-119 to rotate.
[0034] The bottom end of the raised cylinder 21 is slidably connected to a clutch main bearing 20 that is slidably connected to the outer wall of the stop rotating shaft -119. The inner wall of the outer shell 39 on the trademark surface is fixedly connected to a pressing main shaft 37. The outer wall of the pressing main shaft 37 is slidably connected to a forward rotation contact pressing plate 38, which is used to drive the electric screwdriver to rotate. The outer wall of the forward rotation contact pressing plate 38 is slidably connected to a forward rotation contact switch 36.
[0035] A circuit board 45 is installed on the inner wall of the outer shell 39 on the trademark surface. A push rod cover plate 42 is slidably connected to the outer wall of the circuit board 45. A circuit board interference body 41 is fixedly installed on the outer wall of the push rod cover plate 42. A circuit board receiving groove 40 is opened at the top of the push rod cover plate 42. A Hall switch 43 is fixedly connected to the outer wall of the ceramic contact 35. The Hall switch 43 is used to push the stop micro switch 44. The stop micro switch 44 is slidably connected to the outer wall of the Hall switch 43. The stop micro switch 44 is used to send a command to the circuit board 45 to stop the rotation.
[0036] A reverse contact switch 47 is installed on the inner wall of the outer casing 39 on the trademark surface. A reverse press contact switch 46 is slidably connected to the outer wall of the reverse contact switch 47. The reverse press contact switch 46 is used to drive the electric screwdriver to reverse. A three-core aviation plug 48 is installed on the inner wall of the outer casing 39 on the trademark surface. An LED bead 49 is fixedly installed on the outer wall of the component carrier lower casing 51. A copper inlay 50 is fixedly connected to the inner wall of the component carrier lower casing 51.
[0037] During use, align the screwdriver with the top of the component and press the forward contact button 38 or the reverse contact switch 46 as needed to drive the brushless motor 34 to rotate. The brushless motor 34 drives the planetary gear 27 to rotate via the motor main gear / slow / fast speed 29. The planetary gear 27 drives the gear disc 25 to rotate via the pressing spring cover 28. The gear disc 25 drives the drive shaft 3 to rotate via the stop shaft-119. When the component is tightened, the drive shaft 3 stops rotating due to the tightening force, while the brushless motor 34 continues to drive the stop shaft-119 to rotate. The protrusion of the stop shaft-119 squeezes the jumping steel ball 6. The jumping steel ball 6 moves through the stop shaft disc-218 to squeeze the top shaft-117 of the spring. Since the inner wall of the stop shaft disc-218 is provided with an inclined surface, it pushes and squeezes the wine glass steel ball 5. The wine glass steel ball 5 squeezes the stop wine glass 30 and drives the shrinking striker 31 to move. The shrinking striker 31 drives the switch guide rod 33 through the ceramic striker 32 to trigger the Hall switch 43. The Hall switch 43 pushes the stop micro switch 44. The stop micro switch 44 issues a power-off command, and the electric screwdriver completes a self-stop command.
[0038] Example 2
[0039] Reference Figures 1-3This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a spring top shaft -117 is connected between the outer wall of the spring top shaft -216 and the bottom end of the stop shaft disc -218; a lower clutch cylinder 9 is threadedly sleeved on the inner wall of the torque adjusting ring 7 and slidably connected to the outer wall of the torque adjusting rod 8; a pagoda bearing -upper 14 is fixedly connected to the outer wall of the pagoda bearing -lower 11; a spring 15 is connected between the top end of the pagoda bearing -upper 14 and the outer wall of the spring top shaft -216; and the spring 15 is used to increase torque.
[0040] The top of the lower pagoda bearing 11 is slidably connected to a ball bearing 13 that is slidably connected to the inner wall of the upper pagoda bearing 14. The ball bearing 13 is used to reduce the friction caused by the lower pagoda bearing 11. The outer wall of the lower pagoda bearing 11 is slidably connected to a retaining spring 12. The retaining spring 12 is used to fix the position of the lower pagoda bearing 11. At the same time, the retaining spring 12 has room for movement. The inner wall of the lower clutch cylinder 9 is slidably connected to a bearing 10 that is slidably connected to the outer wall of the drive shaft 3. The outer wall of the lower clutch cylinder 9 is threadedly fitted with an upper clutch cylinder 24.
[0041] A pressing spring C-ring 1 is slidably connected to the inner wall of the drive shaft 3. The pressing spring C-ring 1 is used to limit the position of the pressing spring 2. Two screwdriver bit cap steel balls 4 are slidably connected to the outer wall of the drive shaft 3. The screwdriver bit cap steel balls 4 are used to limit the position of the screwdriver bit. A pressing spring 2 is slidably connected to the outer wall of the screwdriver bit cap steel balls 4 and is slidably connected to the outer wall of the pressing spring C-ring 1. The pressing spring 2 is used to squeeze the screwdriver bit cap steel balls 4. A return spring is connected between the outer wall of the pressing spring 2 and the outer wall of the bearing 10. The return spring is used to push the pressing spring 2.
[0042] The outer wall of the lower clutch cylinder 9 is slidably connected to a front locking ring 23, the inner wall of the front locking ring 23 is slidably connected to a component carrier lower housing 51, the outer wall of the component carrier lower housing 51 is fixedly connected to a trademark surface housing 39, the inner wall of the front locking ring 23 is threadedly connected to two evenly distributed screws 22, and the outer wall of the switch guide rod 33 is slidably connected to a brushless motor 34.
[0043] During use, rotating the torque adjusting ring 7 drives the torque adjusting rod 8 to press the lower pagoda bearing 11. The lower pagoda bearing 11, through the upper pagoda bearing 14, presses the spring 15, increasing the torque of the spring 15. At the same time, the lower pagoda bearing 11, through the set ball bearing 13, reduces the friction with the drive shaft 3. When it is necessary to replace the screwdriver bit, pressing the retaining ring C1 and then the return spring is stressed. Since the inner wall of the retaining ring 2 has blocks of different heights, the high-position block blocks the screwdriver bit cap ball 4. After pressing the retaining ring 2, the high-position block disengages from the screwdriver bit cap ball 4. After removing the screwdriver bit and replacing it with a new one, releasing the retaining ring 2, the return spring is stressed and pushes the retaining ring 2. The high-position block inside the retaining ring 2 presses the screwdriver bit cap ball 4, limiting the screwdriver bit. At the same time, pressing the retaining ring C1 limits the position of the retaining ring 2. The operation is now complete.
[0044] The remaining structure is the same as that in Example 1.
[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. An electric screwdriver with a self-stop function after tightening, characterized in that: The utility model provides a wine glass stopper, including transmission shaft (3), the outer wall of transmission shaft (3) is fixedly connected with stop axle disc - 2 (18), the inner wall of transmission shaft (3) is slidably connected with extrusion stop wine glass (30), the outer wall of extrusion stop wine glass (30) is slidably connected with wine glass steel ball (5) with the inner wall of stop axle disc - 2 (18) is slidably connected, the outer wall of extrusion stop wine glass (30) is installed with switch guide bar (33), the outer wall of switch guide bar (33) is slidably connected with ceramic contact (35), the outer wall of transmission shaft (3) is installed with torsion adjustment ring (7), the inner wall of torsion adjustment ring (7) is slidably connected with four torsion adjustment bar (8) of circular array distribution, the outer wall of torsion adjustment bar (8) is fixedly connected with pagoda bearing - lower (11), the outer wall of pagoda bearing - lower (11) is slidably connected with pagoda bearing - upper (14) with the outer wall of transmission shaft (3) is slidably connected.
2. The electric screwdriver with the self-stopping function after screwing according to claim 1, characterized in that: The outer wall of switch guide bar (33) is fixedly connected with ceramic firing pin (32), the outer wall of ceramic firing pin (32) is fixedly connected with thinning firing pin (31) with the outer wall of extrusion stop wine glass (30) is fixedly connected, the outer wall of transmission shaft (3) is slidably connected with stop rotating shaft - 1 (19), the outer wall of stop rotating shaft - 1 (19) is slidably connected with trip steel ball (6) with the top of stop axle disc - 2 (18) is slidably connected, the outer wall of transmission shaft (3) is slidably connected with spring top axle - 2 (16).
3. The electric screwdriver with the self-stopping function after screwing according to claim 2, characterized in that: The outer wall between spring top axle - 2 (16) and the bottom of stop axle disc - 2 (18) is connected with spring top axle - 1 (17), the inner wall of torsion adjustment ring (7) is threadedly sleeved with lower clutch cylinder (9) with the outer wall of torsion adjustment bar (8) is slidably connected, the outer wall of pagoda bearing - lower (11) is fixedly connected with pagoda bearing - upper (14), the top between pagoda bearing - upper (14) and the outer wall of spring top axle - 2 (16) is connected with spring (15).
4. The electric screwdriver with the self-stopping function after screwing according to claim 3, characterized in that: The top of pagoda bearing - lower (11) is slidably connected with ball (13) with the inner wall of pagoda bearing - upper (14) is slidably connected, the outer wall of pagoda bearing - lower (11) is slidably connected with clamping spring (12), the inner wall of lower clutch cylinder (9) is slidably connected with bearing (10) with the outer wall of transmission shaft (3) is slidably connected, the outer wall of lower clutch cylinder (9) is threadedly sleeved with upper clutch cylinder (24).
5. The electric screwdriver with the self-stopping function after screwing according to claim 1, characterized in that: The inner wall of transmission shaft (3) is slidably connected with press clamping spring C ring (1), the outer wall of transmission shaft (3) is slidably connected with two mirror image distribution's spoon head cap steel ball (4), the outer wall of spoon head cap steel ball (4) is slidably connected with press clamping spring (2) with the outer wall of press clamping spring C ring (1) is slidably connected, the outer wall between press clamping spring (2) and bearing (10) is connected with return spring.
6. The electric screwdriver with the self-stopping function after screwing according to claim 3, characterized in that: The outer wall of the lower clutch cylinder (9) is slidingly connected with a front locking ring (23), the inner wall of the front locking ring (23) is slidingly connected with a component carrying lower shell (51), the outer wall of the component carrying lower shell (51) is fixedly connected with a trademark surface upper shell (39), the inner wall of the front locking ring (23) is threadedly connected with two evenly distributed screws (22), and the outer wall of the switch guide rod (33) is slidingly connected with a brushless motor (34).
7. The electric screwdriver with the self-stopping function after screwing according to claim 6, characterized in that: The outer wall of the brushless motor (34) is slidingly connected with a motor main gear / slow / fast (29), the outer wall of the motor main gear / slow / fast (29) is engaged with a planet gear (27), the inner wall of the planet gear (27) is fixedly connected with a gear rotating shaft (26), the outer wall of the gear rotating shaft (26) is slidingly connected with a gear disc (25) which is slidingly connected with the outer wall of the stop rotating shaft-1 (19), the outer wall of the stop rotating shaft-1 (19) is slidingly connected with a cushioning cylinder (21), and the outer wall of the planet gear (27) is engaged with a pressing spring cover (28).
8. The electric screwdriver with the self-stopping function after screwing according to claim 7, characterized in that: The bottom end of the cushioning cylinder (21) is slidingly connected with a clutch main bearing (20) which is slidingly connected with the outer wall of the stop rotating shaft-1 (19), the inner wall of the trademark surface upper shell (39) is fixedly connected with a pressing plate main shaft (37), the outer wall of the pressing plate main shaft (37) is slidingly connected with a forward rotation touch point pressing plate (38), and the outer wall of the forward rotation touch point pressing plate (38) is slidingly connected with a forward rotation touch point switch (36).
9. The electric screwdriver with the self-stopping function after screwing according to claim 6, characterized in that: The inner wall of the trademark surface upper shell (39) is mounted with a circuit board (45), the outer wall of the circuit board (45) is slidingly connected with a push rod cover plate (42), the outer wall of the push rod cover plate (42) is fixedly mounted with a circuit board interference body (41), the top end of the push rod cover plate (42) is provided with a circuit board receiving groove (40), the outer wall of the ceramic touch point (35) is fixedly connected with a Hall switch (43), and the outer wall of the Hall switch (43) is slidingly connected with a stop micro switch (44).
10. The electric screwdriver with the self-stopping function after screwing according to claim 6, characterized in that: The inner wall of the trademark surface upper shell (39) is mounted with a reverse rotation touch point switch (47), the outer wall of the reverse rotation touch point switch (47) is slidingly connected with a reverse pressing touch point switch (46), the inner wall of the trademark surface upper shell (39) is mounted with a three-core aviation plug (48), the outer wall of the component carrying lower shell (51) is fixedly mounted with a lamp bead (49), and the inner wall of the component carrying lower shell (51) is fixedly connected with a copper inlay (50).