Electric ratchet wrench

Abstract

The invention relates to the technical field of electric wrenches, in particular to an electric ratchet wrench which comprises a wrench body, the wrench body is of a columnar structure, a control button is installed in the middle of the upper end of the wrench body, the wrench body is of a hollow structure, and a driving unit is installed at the front end in the wrench body. An electric control system used for controlling the driving unit to work is installed at the rear end in the wrench body, a metal shell is installed at the front end of the wrench body, an opening is formed in the lower end of the metal shell, a rotating unit is installed in the metal shell, and the driving unit is connected with the rotating unit and used for driving the rotating unit to rotate. Through collaborative design of electric pre-locking and manual final locking, the screw assembling efficiency is greatly improved, preliminary locking is rapidly completed in an electric mode, and high torque is accurately applied in a manual mode. A jumping tooth structure avoids motor overload, and efficiency and reliability are both considered; the product is reasonable in design, simple in structure and suitable for batch assembly production.

Description

Technical Field

[0001] This application relates to the technical field of electric wrenches, and particularly to an electric ratchet wrench. Background Art

[0002] A ratchet wrench is a manual tool for tightening and loosening screws. There are single-head and double-head ratchet ring spanners with various specifications. A ratchet wrench is usually composed of a main ring spanner and a secondary ring spanner with different specification sizes, which are connected by the engagement of the female key and male key of a hinge key. Since one ring spanner has two through holes in the shape of a plum blossom with different specifications, it can be used for tightening and loosening screws of two specifications, thus expanding the scope of use and saving raw materials and man-hour costs. The movable wrench handle can conveniently adjust the using angle of the wrench. This kind of wrench is used for tightening and loosening screws, and has the characteristics of strong applicability, convenient use and low cost.

[0003] In the prior art, the publication number CN106166720B provides an electric ratchet wrench, which includes a body, a ratcheting device, a power device and a transmission device. The ratcheting device is rotatably arranged on the body and includes a ratcheting member, a ratchet block group pivotally arranged on the ratcheting member and a toothed ring rotatably sleeved on the ratcheting member. The power device includes a motor, and the transmission device includes a transmission rod. One end of the transmission rod is connected to the motor, and the other end of the transmission rod selectively meshes with or disengages from the toothed ring. By driving the transmission rod with the motor, the ratcheting member rotates. In addition, the body can be manually turned to overcome the resistance during the driving process being greater than the torque of the motor, resulting in the phenomenon of gear skipping between the transmission rod and the toothed ring.

[0004] In the above patent, the ratcheting member rotates by driving the transmission rod with the motor. In addition, the body can be manually turned to overcome the resistance during the driving process being greater than the torque of the motor, resulting in the phenomenon of gear skipping between the transmission rod and the toothed ring. However, when this electric ratchet wrench is in use, when the load torque is too large, the motor is prone to the phenomenon of stalling, which affects the service life of the motor. Moreover, when the wrench is manually adjusted to rotate back, although there is a gear skipping structure to overcome the motor, since its two gear skipping structures are surface tooth structures, the contact surface will increase, resulting in an increase in friction, and there will still be a large resistance during the idle stroke rotation, which will cause the tightened screw to loosen the locked screw again when rotating back; and its structure is complex and there are many parts, which is not suitable for mass assembly production. Summary of the Invention

[0005] In order to solve the problems existing in the background art, the present invention provides an electric ratchet wrench.

[0006] The electric ratchet wrench provided by this application adopts the following technical solutions: An electric ratchet wrench includes a wrench body. The wrench body has a columnar structure. A control button is installed in the middle of the upper end of the wrench body. The inside of the wrench body is a hollow structure. A driving unit is installed at the front end inside the wrench body, and an electric control system for controlling the operation of the driving unit is installed at the rear end inside the wrench body. A metal shell is installed at the front end of the wrench body. An opening is provided at the lower end of the metal shell. A rotating unit is installed inside the metal shell. The driving unit is connected to the rotating unit, and the driving unit is used to drive the rotating unit to rotate.

[0007] The driving unit includes a reduction motor, a rotating shaft, and a one-way output end. The reduction motor is fixedly installed at the front end inside the wrench body through screws. A rotating shaft is installed on the output end of the reduction motor through a coupling, and a one-way output end is installed on the rotating shaft.

[0008] Further, the one-way output end includes a connecting sleeve, a contraction spring, a reverse prevention mechanism, and a rotating sleeve. The front end of the rotating shaft is installed with a connecting sleeve in a plug-in fit manner. A plug-in column is installed at the front end of the connecting sleeve. A through hole is provided in the plug-in column, and a reverse prevention mechanism is installed in the through hole. A rotating sleeve is provided at the front end of the connecting sleeve. The plug-in column is inserted inside the rotating sleeve, and reverse prevention grooves that cooperate with the reverse prevention mechanism are evenly arranged on the inner wall of the rotating sleeve.

[0009] Further, the reverse prevention mechanism includes a tooth block and a connecting spring. The tooth blocks are symmetrically arranged in the through hole, and a connecting spring is installed between the two tooth blocks.

[0010] Further, the tooth block has a columnar structure. A clamping protrusion is provided on the outer end face of the tooth block. When the clamping protrusion rotates clockwise, it locks with the reverse prevention groove, and when the clamping protrusion rotates counterclockwise, it does not engage with the reverse prevention groove.

[0011] Further, the rotating unit includes a metal cover plate, an internal hexagonal socket, a rotating end, and a ratchet mechanism. The metal cover plate is installed at the opening at the lower end of the metal shell through screws. The internal hexagonal socket is installed on the metal cover plate. The rotating end is installed inside the metal shell. One side of the rotating end is connected to the one-way output end, and the other side of the rotating end is connected to the internal hexagonal socket. A ratchet mechanism is installed on the rotating end.

[0012] Further, the rotating end includes an output shaft, a clamping sleeve, a bearing sleeve, and an end face gear. The output shaft is installed inside the metal shell. The bearing sleeve is installed in the middle of the output shaft. The clamping sleeve is installed at the rear side of the output shaft. The clamping sleeve is clamped with the one-way output end. The end face gear is installed at the lower end of the outer side of the internal hexagonal socket. An annular gear is provided at the upper end of the end face gear. A gear column is provided at the front end of the output shaft, and the gear column meshes with the annular gear.

[0013] Furthermore, limit card slots are evenly arranged at the end of the clamping sleeve, and limit protrusions cooperating with the limit card slots are evenly arranged on the rotating sleeve.

[0014] Furthermore, an internal hexagonal groove is formed inside the internal hexagonal sleeve, a strong magnet is installed in the middle of the internal hexagonal groove, and snap rings are installed in the internal hexagonal grooves at both ends of the strong magnet.

[0015] Furthermore, the ratchet mechanism includes a clamping frame, a return spring and a clamping gear. The clamping frame is sleeved on the output shaft, a return spring is installed between the rear side of the clamping frame and the metal shell, the clamping gear is installed on the internal hexagonal sleeve, and the clamping gear is in clamping cooperation with the clamping frame.

[0016] Furthermore, inclined protrusions extending outwards are installed on the outer side surface of the clamping frame, stepped grooves are evenly arranged on the inner side surface of the inclined protrusions on one side of the clamping frame, and the stepped grooves are respectively in clamping cooperation with the tooth grooves on the outer side surfaces of the clamping gear and the end face gear.

[0017] Beneficial Effects Compared with the prior art, the present invention provides an electric ratchet wrench, which has the following beneficial effects: 1. In this invention, through the collaborative design of electric pre-locking and manual final locking, the screw assembly efficiency is greatly improved. The electric mode quickly completes the preliminary locking, and the manual mode accurately applies high torque, avoiding motor overload and taking into account both efficiency and reliability; during disassembly, manual loosening and electric quick disassembly are combined to solve the jamming problem of traditional electric tools when loosening high-resistance screws and reduce the operation intensity.

[0018] 2. In this invention, the contraction spring at the single-direction output end monitors the torque in real time, and automatically disconnects the transmission chain when overloaded, protecting the reduction motor and the gear structure and extending the service life.

[0019] 3. In this invention, the one-way locking characteristic of the anti-reverse mechanism only allows clockwise transmission, and at the same time allows the reverse idle stroke function of the ratchet mechanism, ensuring that there is no motor resistance interference during manual operation and improving the operation fluency.

[0020] 4. This invention has a simple and clear structure and is convenient to assemble, greatly reducing the mass production problem and high cost problem of this type of product. Brief Description of the Drawings

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 It is a three-dimensional structure schematic diagram of the present application.

[0023] Figure 2 It is a three-dimensional sectional structure schematic diagram of the present application.

[0024] Figure 3It is a three-dimensional structure schematic diagram between the driving unit and the rotating unit of the present application.

[0025] Figure 4 It is a three-dimensional sectional structure schematic diagram between the driving unit and the rotating unit of the present application.

[0026] Figure 5 It is an exploded view between the unidirectional output end and the clamping sleeve of the present application.

[0027] Figure 6 It is a three-dimensional structure schematic diagram between the connecting sleeve and the anti-reverse mechanism of the present application.

[0028] Figure 7 It is a three-dimensional structure schematic diagram of the rotating unit of the present application.

[0029] Figure 8 It is an exploded view of the hexagonal socket, the rotating end and the ratchet mechanism within the ratchet mechanism of the present application.

[0030] Explanation of reference numerals: 1, wrench body; 2, driving unit; 21, reduction motor; 22, rotating shaft; 23, unidirectional output end; 231, connecting sleeve; 232, contraction spring; 233, anti-reverse mechanism; 2331, tooth block; 2332, connecting spring; 3, metal shell; 4, rotating unit; 41, metal cover plate; 42, hexagonal socket; 43, rotating end; 431, output shaft; 432, clamping sleeve; 433, bearing sleeve; 434, face gear; 44, ratchet mechanism; 441, clamping frame; 442, return spring; 443, clamping gear. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figure 1-8 , an electric ratchet wrench provided in an embodiment of the present invention includes a wrench body 1. The wrench body 1 has a columnar structure. A control button is installed in the middle of the upper end of the wrench body 1. The inside of the wrench body 1 is a hollow structure. A driving unit 2 is installed at the front end inside the wrench body 1. An electronic control system for controlling the operation of the driving unit 2 is installed at the rear end inside the wrench body 1. A metal shell 3 is installed at the front end of the wrench body 1. An opening is provided at the lower end of the metal shell 3. A rotating unit 4 is installed inside the metal shell 3. The driving unit 2 is connected to the rotating unit 4, and the driving unit 2 is used to drive the rotating unit 4 to rotate.

[0033] Inside the wrench body 1, a control circuit board and a battery are also installed. The control button is electrically connected to the control circuit board, and the start of the drive unit 2 can be controlled through the control button. A charging socket electrically connected to the battery is provided at the bottom of the wrench body 1.

[0034] In the above technical solution, when tightening a screw, the drive unit 2 is driven to work through the control button. The drive unit 2 rotates through the rotating unit 4 to quickly pre-lock the screw. When a certain torque is reached, the wrench body 1 is manually rotated to continue locking the screw; when the screw needs to be removed, the screw is connected to the reverse side of the wrench body 1. First, the tightened screw is loosened manually, and then the removal process of the screw is realized through the rotation of the rotating unit 4.

[0035] Refer to Figures 2-4 As shown, as a preferred technical solution of this embodiment, the drive unit 2 includes a reduction motor 21, a rotating shaft 22, and a one-way output end 23. The reduction motor 21 is fixedly installed at the front end inside the wrench body 1 by screws. A rotating shaft 22 is installed on the output end of the reduction motor 21 through a coupling, and a one-way output end 23 is installed on the rotating shaft 22.

[0036] As a preferred technical solution of this embodiment, the one-way output end 23 includes a connecting sleeve 231, a compression spring 232, a reverse mechanism 233, and a rotating sleeve 234. The front end of the rotating shaft 22 is installed with a connecting sleeve 231 in a plug-in fit manner. A plug post is installed at the front end of the connecting sleeve 231. A through hole is provided in the plug post, and a reverse mechanism 233 is installed in the through hole. A rotating sleeve 234 is provided at the front end of the connecting sleeve 231. The plug post is inserted into the inside of the rotating sleeve 234, and reverse slots cooperating with the reverse mechanism 233 are uniformly arranged on the inner wall of the rotating sleeve 234.

[0037] Refer to Figures 5-6 As shown, as a preferred technical solution of this embodiment, the reverse mechanism 233 includes a tooth block 2331 and a connecting spring 2332. The tooth blocks 2331 are symmetrically arranged in the through hole, and a connecting spring 2332 is installed between the two tooth blocks 2331; the tooth block 2331 is a columnar structure, and a clamping protrusion is provided on the outer end surface of the tooth block 2331. When the clamping protrusion rotates clockwise, it locks with the reverse slot, and when the clamping protrusion rotates counterclockwise, it does not engage with the reverse slot.

[0038] In the above technical solution, the reduction motor 21 is connected to the control button. The reduction motor 21 is turned on through the control button. The reduction motor 21 drives the one-way output end 23 to rotate synchronously through the rotating shaft 22. When the reduction motor 21 rotates clockwise, the reduction motor 21 drives the connecting sleeve 231 to rotate through the rotating shaft 22, and the anti-reverse mechanism 233 inside the connecting sleeve 231 rotates synchronously. At this time, the clamping protrusion on the through-hole internal gear block 2331 is clamped with the anti-reverse groove on the inner wall of the rotating sleeve 234. At this time, the connecting sleeve 231 and the rotating sleeve 234 are locked to form an integral body. Furthermore, when the reduction motor 21 works, the connecting sleeve 231 can drive the rotating unit 4 to work through the rotating sleeve 234.

[0039] When tightening or removing the screw in the manual mode, since the wrench body 1 will rotate synchronously with the screw in the manual mode, at this time, the wrench body 1 needs to rotate back to make the next angular rotation. At the same time, due to the large resistance when the reduction motor 21 rotates reversely, in order to facilitate the rotation back of the wrench body 1, when the wrench body 1 rotates counterclockwise, at this time, the clamping protrusion on the through-hole internal gear block 2331 is not clamped with the anti-reverse groove. At this time, the rotating sleeve 234 rotates, and the connecting sleeve 231 adjacent to the reduction motor 21 does not rotate, which is convenient for manually removing the screw; after the screw is manually tightened or loosened, it is then removed through the electric mode.

[0040] Refer to Figure 7 As shown in the figure, as a preferred technical solution of this embodiment, the rotating unit 4 includes a metal cover plate 41, an internal hexagonal sleeve 42, a rotating end 43, and a ratchet mechanism 44. The metal cover plate 41 is installed at the opening at the lower end of the metal housing 3 through screws. The internal hexagonal sleeve 42 is installed on the metal cover plate 41. The rotating end 43 is installed inside the metal housing 3. One side of the rotating end 43 is connected to the one-way output end 23, and the other side of the rotating end 43 is connected to the internal hexagonal sleeve 42. The ratchet mechanism 44 is installed on the rotating end 43.

[0041] Refer to Figures 7-8 As shown in the figure, as a preferred technical solution of this embodiment, the rotating end 43 includes an output shaft 431, a clamping sleeve 432, a bearing sleeve 433, and an end face gear 434. The output shaft 431 is installed inside the metal housing 3. The bearing sleeve 433 is installed in the middle of the output shaft 431. The clamping sleeve 432 is installed at the rear of the output shaft 431. The clamping sleeve 432 is clamped with the one-way output end 23. The end face gear 434 is installed at the lower end of the outer side of the internal hexagonal sleeve 42. An annular gear is provided at the upper end of the end face gear 434. A gear column is provided at the front end of the output shaft 431. The gear column meshes with the annular gear.

[0042] In the above technical solution, when the unidirectional output end 23 works, the unidirectional output end 23 drives the output shaft 431 to rotate through the clamping sleeve 432, and the output shaft 431 drives the end face gear 434 to rotate by means of gear meshing. The end face gear 434 can then drive the hexagon socket 42 to rotate synchronously. The hexagon socket 42 has hexagonal holes on both sides and can be installed with a conventional bit or a connecting sleeve. A lockable screw is used on the front of the hexagon socket 42, and a removable screw is used on the back of the hexagon socket 42.

[0043] Refer to Figure 5 and Figure 7 As shown, as a preferred technical solution of this embodiment, the end of the clamping sleeve 432 is uniformly provided with limiting slots, and the rotating sleeve 234 is uniformly arranged with limiting protrusions that cooperate with the limiting slots.

[0044] In the above technical solution, the rotating sleeve 234 at the end of the unidirectional output end 23 is not fixedly connected to the clamping sleeve 432. The compression spring 232 always drives the rotating sleeve 234 to be tightly pressed against the clamping sleeve 432, so that the rotating sleeve 234 and the clamping sleeve 432 can mesh together. When the rotating sleeve 234 drives, the clamping sleeve 432 will drive synchronously with the rotating sleeve 234; when the torque is too large, the compression spring 232 will drive the rotating sleeve 234 to contract, so that the rotating sleeve 234 is disengaged from the end of the clamping sleeve 432, avoiding the phenomenon of the reduction motor 21 being blocked due to excessive torque, and at the same time reducing the phenomenon of the internal gears jumping teeth.

[0045] Refer to Figure 7 and Figure 8 As shown, as a preferred technical solution of this embodiment, the hexagon socket 42 is internally provided with a hexagon slot, a strong magnet is installed in the middle of the hexagon slot, and snap rings are installed in the hexagon slots at both ends of the strong magnet.

[0046] In the above technical solution, the strong magnet can be used to adsorb the inner side of the conventional bit or the connecting sleeve, and the snap ring can further prevent the conventional bit or the connecting sleeve from falling off.

[0047] Refer to Figures 7-8 As shown, as a preferred technical solution of this embodiment, the ratchet mechanism 44 includes a clamping frame 441, a return spring 442 and a clamping gear 443. The clamping frame 441 is sleeved on the output shaft 431, a return spring 442 is installed between the back side of the clamping frame 441 and the metal housing 3, and a clamping gear 443 is installed on the hexagon socket 42. The clamping gear 443 is in clamping cooperation with the clamping frame 441.

[0048] Refer to Figure 3As shown, as the preferred technical solution of this embodiment, an inclined protrusion extending outward is installed on the outer side surface of the clamping frame 441. Step grooves are uniformly arranged on the inner side surface of the inclined protrusion on one side of the clamping frame 441, and the step grooves are respectively in clamping fit with the tooth grooves on the outer side surfaces of the clamping gear 443 and the end face gear 434.

[0049] In the above technical solution, in the manual mode, when moving forward, the step grooves on the clamping frame 441 are in clamping fit with the outer side surfaces of the clamping gear 443 and the end face gear 434, and the outer side of the clamping frame 441 is in close contact with the metal shell 3. Furthermore, the clamping frame 441 is completely locked with the clamping gear 443 and the end face gear 434, so as to achieve the function of manually locking and transmitting torque; when rotating in the reverse direction, the clamping gear 443 and the end face gear 434 are not in clamping with the step grooves, the clamping gear 443 and the end face gear 434 drive the clamping frame 441 to disengage, the return spring 442 repeatedly expands and contracts, and the clamping frame 441 slides over the tooth grooves on the outer sides of the clamping gear 443 and the end face gear 434 (making a "click" sound), realizing the function of the ratchet mechanism with free travel return.

[0050] Combined with the above structure, when a pathological tissue after embedding is sliced by an electric ratchet wrench provided by the present invention, it is implemented according to the following steps: S1: Electric pre-locking stage The user presses the control button to start the driving unit 2, and the control circuit board triggers the reduction motor 21 to rotate clockwise. The reduction motor 21 drives the connecting sleeve 231 to rotate through the rotating shaft 22. At this time, the tooth block 2331 of the anti-reverse mechanism 233 is in clamping fit with the anti-reverse groove on the inner wall of the rotating sleeve 234 under the action of the connecting spring 2332, forming a one-way transmission. The power is transmitted to the clamping sleeve 432 of the rotating unit 4 through the rotating sleeve 234, driving the output shaft 431 to rotate. The gear column at the front end of the output shaft 431 meshes with the end face gear 434, driving the hexagon socket 42 to rotate clockwise to quickly pre-lock the screw. When the torque reaches the threshold value, the contraction spring 232 compresses to disengage the rotating sleeve 234 from the clamping sleeve 432, cutting off the power transmission to prevent the motor from stalling.

[0051] S2: Manual final locking stage After the pre-locking is completed, the user manually rotates the wrench body 1 clockwise. At this time, the clamping frame 441 of the ratchet mechanism 44 is locked with the clamping gear 443 and the end face gear 434 through the step grooves, and the torque is directly transmitted to the hexagon socket 42 to complete the final locking of the screw. When the wrench body 1 rotates reversely to adjust the angle, the return spring 442 pushes the clamping frame 441 to disengage from the tooth groove, and the end face gear 434 rotates idly, realizing the function of the ratchet mechanism with free travel return (accompanied by a "click" sound), allowing repeated manual operations.

[0052] S3: Manual initial loosening stage When disassembling, reverse the wrench body 1 so that the inner hexagon socket 42 is connected to the screw on the reverse side. The user manually rotates the wrench counterclockwise, and the clamping frame 441 of the ratchet mechanism 44 reversely locks the end face gear 434 to transmit torque to loosen the screw. At the same time, the manual reverse rotation causes the anti-reverse mechanism 233 of the rotating sleeve 234 and the connecting sleeve 231 to disengage, and the rotating sleeve 234 rotates freely, avoiding the resistance interference of the reduction motor 21 to the manual operation.

[0053] S4: Electric fast disassembly stage After the screw is initially loosened, the user presses the control button again to start the reduction motor 21 to rotate. At this time, the reduction motor 21 drives the one-way output end 23 to rotate, so that the rotating sleeve 234 and the clamping sleeve 432 are re-engaged, driving the inner hexagon socket 42 to rotate counterclockwise at high speed to quickly remove the screw. During the process, the contraction spring 232 monitors the torque in real time and automatically disengages when overloaded to protect the motor and gear structure.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An electric ratchet wrench, comprising a wrench body (1), characterized in that, The wrench body (1) is in a columnar structure. A control button is installed in the middle of the upper end of the wrench body (1). The inside of the wrench body (1) is a hollow structure. A driving unit (2) is installed at the front end inside the wrench body (1). An electronic control system for controlling the operation of the driving unit (2) is installed at the rear end inside the wrench body (1). A metal shell (3) is installed at the front end of the wrench body (1). An opening is provided at the lower end of the metal shell (3). A rotating unit (4) is installed inside the metal shell (3). The driving unit (2) is connected to the rotating unit (4), and the driving unit (2) is used to drive the rotating unit (4) to rotate. The driving unit (2) includes a reduction motor (21), a rotating shaft (22), and a one-way output end (23). The reduction motor (21) is fixedly installed at the front end inside the wrench body (1) by screws. A rotating shaft (22) is installed on the output end of the reduction motor (21) through a coupling. A one-way output end (23) is installed on the rotating shaft (22).

2. The electric ratchet wrench according to claim 1, characterized in that: The one-way output end (23) includes a connecting sleeve (231), a contraction spring (232), a reverse-stop mechanism (233), and a rotating sleeve (234). The front end of the rotating shaft (22) is installed with a connecting sleeve (231) in a plug-in fit manner. A plug-in column is installed at the front end of the connecting sleeve (231). A through hole is provided on the plug-in column, and a reverse-stop mechanism (233) is installed in the through hole. A rotating sleeve (234) is provided at the front end of the connecting sleeve (231). The plug-in column is inserted inside the rotating sleeve (234). Reverse-stop grooves for cooperating with the reverse-stop mechanism (233) are evenly arranged on the inner wall of the rotating sleeve (234).

3. The electric ratchet wrench according to claim 2, wherein: The reverse-stop mechanism (233) includes a tooth block (2331) and a connecting spring (2332). The tooth blocks (2331) are symmetrically arranged in the through hole, and a connecting spring (2332) is installed between the two tooth blocks (2331).

4. An electric ratchet wrench according to claim 3, characterized in that: The tooth block (2331) is in a columnar structure. A clamping protrusion is provided on the outer end surface of the tooth block (2331). When the clamping protrusion rotates clockwise, it locks with the reverse-stop groove, and when the clamping protrusion rotates counterclockwise, it does not engage with the reverse-stop groove.

5. The electric ratchet wrench according to claim 4, characterized in that: The rotating unit (4) includes a metal cover plate (41), an internal hexagonal socket (42), a rotating end (43), and a ratchet mechanism (44). A metal cover plate (41) is installed at the opening at the lower end of the metal shell (3) by screws. An internal hexagonal socket (42) is installed on the metal cover plate (41). A rotating end (43) is installed inside the metal shell (3). One side of the rotating end (43) is connected to the one-way output end (23), and the other side of the rotating end (43) is connected to the internal hexagonal socket (42). A ratchet mechanism (44) is installed on the rotating end (43).

6. The electric ratchet wrench according to claim 5, characterized in that: The rotating end (43) includes an output shaft (431), a clamping sleeve (432), a bearing sleeve (433) and an end face gear (434). The output shaft (431) is installed inside the metal housing (3). The bearing sleeve (433) is installed in the middle of the output shaft (431). The clamping sleeve (432) is installed at the rear side of the output shaft (431). The clamping sleeve (432) is clamped with the one-way output end (23). The end face gear (434) is installed at the lower end of the outer side of the hexagon socket (42). An annular gear is arranged at the upper end of the end face gear (434). A gear column is arranged at the front end of the output shaft (431). The gear column meshes with the annular gear.

7. An electric ratchet wrench according to claim 6, characterized in that: The end of the clamping sleeve (432) is evenly provided with limit card slots, and the rotating sleeve (234) is evenly arranged with limit protrusions that cooperate with the limit card slots.

8. The electric ratchet wrench according to claim 7, characterized in that: The inner of the hexagon socket (42) is provided with a hexagon slot. A strong magnet is installed in the middle of the hexagon slot. Snap rings are installed in the hexagon slots at both ends of the strong magnet.

9. The electric ratchet wrench according to claim 8, characterized in that: The ratchet mechanism (44) includes a clamping frame (441), a return spring (442) and a clamping gear (443). The clamping frame (441) is sleeved on the output shaft (431). A return spring (442) is installed between the rear side of the clamping frame (441) and the metal housing (3). The clamping gear (443) is installed on the hexagon socket (42). The clamping gear (443) is in clamping cooperation with the clamping frame (441).

10. An electric ratchet wrench according to claim 9, characterized in that: An inclined protrusion extending outwards is installed on the outer side of the clamping frame (441). Step grooves are evenly arranged on the inner side of the inclined protrusion on one side of the clamping frame (441). The step grooves are respectively in clamping cooperation with the tooth grooves on the outer sides of the clamping gear (443) and the end face gear (434).

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