Electric ratchet wrench

Abstract

The invention discloses an electric ratchet wrench, belongs to the field of electric ratchet wrenchs.The problems that an existing electric ratchet wrench is complex in reversing function and high in manufacturing difficulty and cost are solved, according to the technical scheme, the electric ratchet wrench mainly comprises a machine shell, the machine shell comprises a containing bin and a head shell, and a driving motor is installed in the containing bin; a ratchet mechanism and a transmission shaft are arranged in the head shell, the ratchet mechanism is connected with an output head, an output shaft of the driving motor is in transmission connection with the ratchet mechanism through the transmission shaft, the ratchet mechanism comprises a ratchet part and a pawl, the ratchet part is slidably installed at the end of the head shell, and the ratchet part is matched with the pawl to limit the ratchet part to rotate only in one direction. The ratchet part is provided with a rotating axis, in the direction of the rotating axis, the surfaces of the two ends of the ratchet part are provided with inserting holes allowing the output heads to stretch into, and the output heads are detachably connected with the inserting holes and synchronously rotate along with the ratchet part. The reversing device is mainly used for omitting a braking device, and the reversing function can be achieved only by turning over the ratchet wrench.

Description

Technical Field

[0001] The invention discloses an electric ratchet wrench, belonging to the technical field of ratchet wrenches. Background Art

[0002] A ratchet wrench is a one-way effective disassembly and assembly tool, mainly used for tightening and loosening screws. It is widely used and is well known and common to the public.

[0003] For example, patent CN108453657B discloses a penetrating electric ratchet wrench, which includes a main body, a driving device, a braking device arranged on the main body and connected to the driving device, and a power device that provides torque. The braking device includes a rotatable dial, a slidable ratchet block, and a top braking group arranged between the dial and the ratchet block. The ratchet block and the ring tooth portion of the driving member are meshed with each other. The top braking group includes a top braking member and a spring. The top braking member pushes against the ratchet block and elastically provides an elastic force to the top braking member. The dial is switched between a first position and a second position by human power, thereby swinging the top braking member, thereby changing the meshing relationship between the ratchet block and the ring tooth portion, thereby realizing the reversing function of the driving device by human power.

[0004] However, in the above patent, the reversing function of the driving device needs to be realized by adjusting the deflection position of the ratchet block by turning the knob, and the braking device and the driving device need to be precisely matched, which will increase the structural complexity of the entire ratchet wrench and increase the difficulty and cost of manufacturing the ratchet wrench; in addition, when the knob is not turned to the specified position, the meshing of the ratchet block and the ring tooth part may deviate, which may easily cause jamming, and will also cause wear to the driving device and the braking device, affecting the service life of the electric ratchet wrench. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the reversing function of the existing electric ratchet wrench is relatively complicated, and the manufacturing difficulty and cost are high. For this purpose, an electric ratchet wrench is provided, which can omit the braking device and realize the reversing function only by flipping the ratchet wrench.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An electric ratchet wrench comprises a casing, which comprises a accommodating chamber and a head casing which are spliced ​​with each other. A driving motor is installed in the accommodating chamber, and the output shaft of the driving motor extends toward the head casing. A transmission-connected ratchet mechanism and a transmission shaft are arranged in the head casing. The ratchet mechanism is connected with an output head for driving a workpiece, and the output shaft of the driving motor is transmission-connected to the ratchet mechanism through the transmission shaft. The ratchet mechanism comprises a ratchet member and a pawl. The ratchet member is slidably mounted on the end of the head casing, and the ratchet member cooperates with the pawl to limit the ratchet member to rotate only in one direction. The ratchet member has a rotation axis. In the direction of the rotation axis, surfaces at both ends of the ratchet member are provided with sockets for the output head to extend into, and the output head is detachably connected to the socket and rotates synchronously with the ratchet member.

[0008] The beneficial effects of adopting the present invention are:

[0009] The surfaces of both ends of the ratchet member described in the present invention are provided with sockets, and the two surfaces are both perpendicular to the rotation axis of the ratchet member. The output head can be connected to the ratchet member through the sockets. After the driving motor is started, the ratchet member is driven to rotate through the transmission shaft, and the output head rotates with the ratchet member to achieve the twisting of the workpiece. Since both ends of the ratchet member are provided with sockets, the output head can be arbitrarily assembled at both ends of the ratchet member so that the ratchet member has two working surfaces. In addition, the cooperation between the ratchet member and the pawl limits the ratchet member to rotate only in one direction. Although the driving motor can only drive the ratchet member to rotate in one direction, after the output head is respectively installed in the sockets on the two working surfaces, the directions of the torque applied by the output head to the workpiece are opposite, thereby realizing the reversing function of the electric ratchet wrench. The present invention only adjusts the output head by setting two sockets. The reversing function of the electric ratchet wrench can be realized by the installation position, and the braking device can be completely omitted, thereby greatly simplifying the overall structure of the electric ratchet wrench and reducing the manufacturing difficulty and cost of the electric ratchet wrench; secondly, only the ratchet member and the pawl are provided, which can make the cooperation between the ratchet member and the pawl more compact, make the rotation of the ratchet member more stable and reliable, reduce the possibility of the ratchet member getting stuck, and also reduce the space occupied by the ratchet mechanism, so that the electric ratchet wrench can be more compact; in addition, the output head is detachably connected to the jack, which makes the replacement of the output head simpler and faster, and enables the ratchet member to be equipped with a variety of output heads of different sizes and types. Users can replace the corresponding type of output head according to the operation requirements, so that the electric ratchet wrench can have a wider range of applications, which helps to improve the user experience.

[0010] Preferably, the jacks at both ends of the ratchet member are interconnected. With the above technical solution, the jacks at both ends are interconnected, that is, the jacks penetrate the ratchet member as a whole, so the jacks will not limit the output head, so that the ratchet member can be applied to more different types of output heads, which can further improve the application range of the electric ratchet wrench.

[0011] Preferably, the output head includes a connection end and an output end, and a mounting groove is provided on the side wall of the socket, a magnetic member is fixed in the mounting groove, and the output head extends into the socket so that the magnetic member can adsorb the connection end. With the above technical solution, the magnetic member can adsorb the output head, which helps to improve the connection stability between the ratchet member and the output head, reduce the possibility of the output head being separated from the ratchet member, and make the use of the electric ratchet wrench safer and more reliable; in addition, the magnetic member is fixed to the side wall of the socket, so that the output head can be kept in close contact with the inner wall of the socket, which can increase the friction between the output head and the inner wall of the socket, thereby ensuring the synchronous rotation of the output head and the ratchet member, and reducing the possibility of the output head and the ratchet member slipping; secondly, the direction of the adsorption force of the magnetic member on the output head is perpendicular to the rotation axis of the ratchet member. When the output head needs to be replaced, the force of the user pulling out the output head is perpendicular to the adsorption force of the magnetic member, and then the user can use a small external force to separate the output head from the adsorption member, making the disassembly of the output head easier and more labor-saving, which helps to improve the replacement efficiency of the output head.

[0012] Preferably, the ratchet mechanism also includes a reset member, a ratchet tooth meshing with a pawl is provided on the outer peripheral side of the ratchet member, a sliding groove for the pawl to slide is provided in the head shell, the reset member is restricted between the pawl and the sliding groove, and the reset member acts on the pawl so that the pawl has a movement tendency to maintain meshing with the ratchet tooth.

[0013] Preferably, the ratchet component includes an upper ratchet and a lower ratchet, one side of the upper ratchet forms an upper working surface, a connecting column extends from the side of the upper ratchet facing away from the upper working surface, one side of the lower ratchet forms a lower working surface, and a slot is provided on the side of the lower ratchet facing away from the lower working surface, and the connecting column and the slot are plugged into each other to achieve anti-rotation cooperation between the upper ratchet and the lower ratchet.

[0014] Preferably, the outer diameter of the connecting column is smaller than the outer diameter of the upper working surface, and a first bevel gear is provided on the side of the upper ratchet wheel facing the lower ratchet wheel or on the side of the lower ratchet wheel facing the upper ratchet wheel, and the first bevel gear is distributed on the outer peripheral side of the connecting column, and a second bevel gear meshing with the first bevel gear is provided on the end of the transmission shaft. By adopting the above technical solution, vertical transmission between the transmission shaft and the ratchet wheel can be achieved through the cooperation of the first bevel gear and the second bevel gear, reducing energy loss during the transmission process, so that the ratchet wheel has a larger output torque, which helps to improve the screwing effect of the electric ratchet wrench.

[0015] Preferably, the first bevel gear and the upper ratchet or the lower ratchet are an integrated structure. The above technical solution can improve the overall strength of the ratchet member and reduce the possibility of performance degradation of the ratchet member due to loose connection or wear between the first bevel gear and the upper ratchet or the lower ratchet; in addition, the integrated structure can also avoid the possibility of slipping between the first bevel gear and the ratchet member, ensuring more accurate and stable transmission of torque.

[0016] Preferably, the ratchet member is an integrated structure, the ratchet member is provided with an annular groove distributed on the outer peripheral side of the socket, the groove wall of the annular groove is provided with a first bevel gear, the end of the transmission shaft is provided with a second bevel gear, and the end of the transmission shaft extends into the annular groove to keep the first bevel gear engaged with the second bevel gear.

[0017] Preferably, the head shell includes a working part and a connecting part, the connecting part is detachably connected to the accommodating bin, the working part is located at an end of the connecting part away from the accommodating bin, a first through-hole for installing the transmission shaft is formed inside the connecting part, the working part is provided with a second through-hole connected to the first through-hole, the second through-hole penetrates the working part in a vertical direction of the first through-hole, and the ratchet part is rotatably installed on the inner wall of the second through-hole.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings:

[0020] Figure 1 An exploded view of an electric ratchet wrench of the present invention;

[0021] Figure 2 A cross-sectional view of an electric ratchet wrench of the present invention;

[0022] Figure 3 A cross-sectional view of a ratchet member and a transmission shaft in an electric ratchet wrench of the present invention;

[0023] Figure 4 A side view of a ratchet mechanism in an electric ratchet wrench of the present invention;

[0024] Figure 5 The present invention provides a top view of a ratchet mechanism in an electric ratchet wrench.

[0025] Figure numerals: 11. accommodating chamber; 12. head shell; 121. first through hole; 122. second through hole; 13. power supply assembly; 14. switch button; 2. driving motor; 21. output shaft; 22. transmission shaft; 221. second bevel gear; 3. ratchet member; 31. upper ratchet; 311. upper working surface; 312. connecting column; 32. lower ratchet; 321. lower working surface; 322. slot; 33. socket; 34. magnetic member; 35. pawl; 351. second reset member; 36. first bevel gear; 37. annular groove; 5. output head. DETAILED DESCRIPTION

[0026] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 5As shown, this embodiment shows an electric ratchet wrench, including a housing, the housing including a receiving chamber 11 and a head housing 12 spliced ​​to each other, wherein a drive motor 2 and a power supply assembly 13 are installed in the receiving chamber 11, a switch button 14 is installed on the outer surface of the receiving chamber 11, the power supply assembly 13 provides power to the drive motor 2, and the switch button 14 controls the start and stop of the drive motor 2, the output shaft 21 of the drive motor 2 passes through the receiving chamber 11 and extends into the head housing 12, and a ratchet mechanism and a transmission assembly 13 are installed in the head housing 12. The moving shaft 22 and the two ends of the transmission shaft 22 are respectively connected to the output shaft 21 and the ratchet mechanism for transmission. The ratchet mechanism includes a ratchet member 3 and a pawl 35. The ratchet member 3 is slidably installed on the end of the head shell 12. The ratchet member 3 cooperates with the pawl 35 to limit the ratchet member 3 to rotate only in one direction. The ratchet member 3 has a rotation axis. In the direction of the rotation axis, the surfaces of both ends of the ratchet member 3 are provided with a socket 33 for the output head 5 to extend into. The output head 5 is detachably connected to the socket 33 and rotates synchronously with the ratchet member 3.

[0031] The surfaces of both ends of the ratchet member 3 described in this embodiment are provided with sockets 33, and these two surfaces are both perpendicular to the rotation axis of the ratchet member 3. The output head 5 can be connected to the ratchet member 3 through the sockets 33. After the drive motor 2 is started, the ratchet member 3 is driven to rotate through the transmission shaft 22, and the output head 5 rotates with the ratchet member 3 to achieve the twisting of the workpiece. Since both ends of the ratchet member 3 are provided with sockets 33, the output head 5 can be arbitrarily assembled at the two ends of the ratchet member 3 so that the ratchet member 3 has two working surfaces. In addition, the cooperation between the ratchet member 3 and the pawl 35 limits the ratchet member 3 to rotate in only one direction. Although the drive motor 2 can only drive the ratchet member 3 to rotate in one direction, after the output head 5 is respectively installed in the sockets 33 on the two working surfaces, the directions of the torques applied by the output head 5 to the workpiece are opposite, thereby realizing the reversing function of the electric ratchet wrench. This embodiment only provides two sockets 33. Hole 33, adjusting the installation position of the output head 5 can realize the reversing function of the electric ratchet wrench, and the braking device can be completely omitted, thereby greatly simplifying the overall structure of the electric ratchet wrench and reducing the manufacturing difficulty and cost of the electric ratchet wrench; secondly, only the ratchet member 3 and the pawl 35 are set, which can make the cooperation between the ratchet member 3 and the pawl 35 more compact, make the rotation of the ratchet member 3 more stable and reliable, reduce the possibility of the ratchet member 3 being stuck, and at the same time reduce the space occupied by the ratchet mechanism, so that the electric ratchet wrench can be more compact; in addition, the output head 5 is detachably connected to the socket 33, so that the replacement of the output head 5 is simpler and faster, and the ratchet member 3 can be equipped with a variety of output heads 5 of different sizes and types. The user can replace the corresponding type of output head 5 according to the operation requirements, so that the electric ratchet wrench can have a wider range of applications, which helps to improve the user experience.

[0032] like Figure 2As shown, the head shell 12 described in this embodiment includes a working part and a connecting part, wherein the connecting part is in the shape of a hollow cylinder, one end of the connecting part is detachably connected to the accommodating chamber 11, and the working part is fixed to the other end of the connecting part. A first through hole 121 is formed inside the connecting part, and the output shaft 21 of the driving motor 2 extends into the first through hole 121. A transmission shaft 22 is rotatably connected in the first through hole 121, and the transmission shaft 22 is transmission-connected to the output shaft 21. The working part is provided with a second through hole 122 connected to the first through hole 121, and the second through hole 122 penetrates the working part in a vertical direction of the first through hole 121. The ratchet member 3 is rotatably installed on the inner wall of the second through hole 122, and one end of the transmission shaft 22 away from the output shaft 21 extends into the second through hole 122 and is transmission-connected to the ratchet member 3. After the driving motor 2 is started, the output shaft 21 drives the ratchet member 3 to rotate through the transmission shaft 22, so that the ratchet member 3 rotates relative to the working part of the head shell 12.

[0033] like Figure 3 and Figure 4 As shown, the ratchet member 3 in this embodiment includes an upper ratchet 31 and a lower ratchet 32. An upper working surface 311 is formed on one side of the upper ratchet 31, and the upper working surface 311 is located at one end of the second through hole 122. A connecting column 312 extends from the side of the upper ratchet 31 facing away from the upper working surface 311. A lower working surface 321 is formed on one side of the lower ratchet 32, and the lower working surface 321 is located at the other end of the second through hole 122. A slot 322 is provided on the side of the lower ratchet 32 ​​facing away from the lower working surface 321. The connecting column 312 is plugged into the slot 322 to realize the connection between the upper ratchet 31 and the lower ratchet 32. The upper ratchet 31 and the lower ratchet 32 ​​are rotationally connected to the working part of the head shell 12 through a retaining spring. The upper working surface 311 and the lower working surface 321 of the ratchet member 3 are respectively located at the two ends of the second through hole 122. The socket 33 of the upper working surface 311 passes through the connecting column 312 and thus maintains communication with the socket 33 of the lower working surface 321, that is, the socket 33 passes through the ratchet member 3 as a whole. Therefore, the socket 33 will not limit the output head 5, so that the ratchet member 3 can be applied to more different types of output heads 5, which can further improve the scope of application of the electric ratchet wrench.

[0034] like Figure 3As shown, in this embodiment, the outer diameters of the upper working surface 311 and the lower working surface 321 are the same, the outer diameter of the connecting column 312 is smaller than the outer diameter of the upper working surface 311, and the slot 322 matches the connecting column 312. When the upper ratchet 31 and the lower ratchet 32 ​​are spliced, an annular groove 37 is formed on the outer peripheral side of the connecting column 312, and a first bevel gear 36 is provided on the side of the lower ratchet 32 ​​facing the upper ratchet 31. The first bevel gear 36 is located on a groove wall of the annular groove 37, and the end of the transmission shaft 22 is provided with a second bevel gear meshing with the first bevel gear 36. Wheel 221, the driving motor 2 drives the transmission shaft 22 to rotate, and the transmission shaft 22 drives the lower ratchet 32 ​​to rotate through the first bevel gear 36 and the second bevel gear 221, and the upper ratchet 31 and the lower ratchet 32 ​​keep rotating synchronously, thereby realizing the relative rotation of the ratchet member 3 and the head shell 12. Through the cooperation of the first bevel gear 36 and the second bevel gear 221, the vertical transmission between the transmission shaft 22 and the ratchet member 3 can be realized, reducing the energy loss in the transmission process, so that the ratchet member 3 has a larger output torque, which helps to improve the screwing effect of the electric ratchet wrench.

[0035] In this embodiment, the first bevel gear 36 and the upper ratchet 31 are an integrated structure, which can improve the overall strength of the ratchet member 3 and reduce the possibility of performance degradation of the ratchet member 3 due to loose connection or wear between the first bevel gear 36 and the upper ratchet 31 or the lower ratchet 32; in addition, the integrated structure can also avoid the possibility of slipping between the first bevel gear 36 and the ratchet member 3, ensuring that the torque transmission is more accurate and stable.

[0036] Of course, it is understandable that in other embodiments, the first bevel gear 36 may also be disposed on the side of the upper ratchet 31 facing the lower ratchet 32 ​​, and similarly, the first bevel gear 36 may also be an integrated structure with the upper ratchet 31 .

[0037] Of course, it is understandable that in other embodiments, the upper ratchet 31 and the lower ratchet 32 ​​may also be an integrated structure, that is, the overall ratchet member 3 is an integral whole, the socket 33 passes through the ratchet member 3 in the direction of the second through hole 122, and an annular groove 37 is provided on the outer peripheral side of the ratchet member 3. The annular groove 37 is distributed around the socket 33, and a first bevel gear 36 is provided on a groove wall of the annular groove 37. A second bevel gear 221 is provided at the end of the transmission shaft 22, and the end of the transmission shaft 22 extends into the annular groove 37 to keep the first bevel gear 36 meshing with the second bevel gear 221.

[0038] like Figure 4 and Figure 5As shown, the ratchet mechanism in this embodiment also includes a reset member, and the outer wall of the upper ratchet 31 connected to the upper working surface 311 is provided with circumferentially distributed ratchet teeth, and the outer wall of the lower ratchet 32 ​​connected to the lower working surface 321 is also provided with circumferentially distributed ratchet teeth. A sliding groove for sliding the pawl 35 is provided in the head shell 12, and the reset member is limited between the pawl 35 and the sliding groove. The reset member acts on the pawl 35 so that the pawl 35 has a movement tendency to keep meshing with the ratchet teeth. When the driving motor 2 drives the ratchet member 3 to rotate, the ratchet 35 The ratchet teeth of the wheel member 3 will push the pawl 35 away from the ratchet member 3, and the reset member will push the pawl 35 to slide toward the ratchet member 3, so that the pawl 35 can keep meshing with the ratchet teeth of the ratchet member 3, so that the ratchet member 3 can keep sliding cooperation with the pawl 35, so that the ratchet member 3 can keep rotating smoothly, and when the ratchet member 3 rotates in the opposite direction relative to the head shell 12, the pawl 35 will be stuck with the ratchet teeth of the ratchet member 3, thereby limiting the rotation of the ratchet member 3 in the opposite direction, so that the ratchet member 3 can only rotate in one direction.

[0039] like Figure 5 As shown, the output head 5 described in this embodiment includes a connecting end and an output end, and the side wall of the socket 33 is provided with a mounting groove, in which a magnetic attraction member 34 is fixed, and the output head 5 extends into the socket 33 so that the magnetic attraction member 34 can adsorb the connecting end. In addition, in order to limit the relative rotation between the connecting end and the socket 33, the cross-section of the socket 33 described in this embodiment is a quadrilateral, hexagonal, D-shaped or other non-circular shape, and the cross-section of the connecting end matches the cross-section of the socket 33, thereby realizing the anti-rotation fit between the socket 33 and the output head 5.

[0040] In addition, the magnetic suction member 34 can adsorb the output head 5, which helps to improve the connection stability between the ratchet member 3 and the output head 5, and reduce the possibility of the output head 5 being separated from the ratchet member 3, making the use of the electric ratchet wrench safer and more reliable; in addition, the magnetic suction member 34 is fixed to the side wall of the socket 33, so that the output head 5 can be kept in close contact with the inner wall of the socket 33, which can increase the friction between the output head 5 and the inner wall of the socket 33, thereby ensuring the synchronous rotation of the output head 5 and the ratchet member 3, and reducing the possibility of the output head 5 and the ratchet member 3 slipping; secondly, the direction of the adsorption force of the magnetic suction member 34 on the output head 5 is perpendicular to the rotation axis of the ratchet member 3. When the output head 5 needs to be replaced, the force used by the user to pull out the output head 5 is kept perpendicular to the adsorption force of the magnetic suction member 34, and then the user can use a smaller external force to separate the output head 5 from the adsorption member, making the disassembly of the output head 5 easier and more labor-saving, which helps to improve the replacement efficiency of the output head 5.

[0041] The electric ratchet wrench described in this embodiment has two usage modes, namely electric drive and manual drive. When the electric ratchet wrench is in electric drive rotation, the user controls the drive motor 2 to turn on by pressing the switch button 14 on the surface of the accommodating chamber 11, and the drive motor 2 drives the output shaft 21 to rotate. The output shaft 21 drives the ratchet member 3 to rotate relative to the head shell 12 through the transmission shaft 22. At this time, the ratchet member 3 and the clamping claw slide in cooperation. Assuming that when the output end of the output head 5 extends from the upper working surface 311 of the ratchet member 3, the screwing direction of the output head 5 on the workpiece is the tightening direction, then when the workpiece needs to be tightened, the connecting end of the output head 5 is inserted into the socket 33 from the upper working surface 311, and the output end is extended from the upper working surface 311; and when the workpiece needs to be loosened, the connecting end of the output head 5 is inserted into the socket 33 from the lower working surface 321, and the output end is extended from the lower working surface 321. At this time, the output head 5 drives the workpiece to rotate in the opposite direction, so that the workpiece can be loosened.

[0042] In addition, the electric ratchet wrench in the present embodiment can also be manually driven. At this time, the driving motor 2 in the accommodating chamber 11 is not started, and the user manually controls the entire casing to drive the workpiece to rotate. In the rotation direction of the casing, the ratchet member 3 and the pawl 35 form a limit fit to keep the ratchet member 3 and the head shell 12 relatively fixed. Therefore, the user can drive the workpiece to rotate by rotating the casing. Manual drive can make the installation of the workpiece more compact, and at the same time, it can also loosen the stuck workpiece, and the possibility of damage to the driving motor 2 due to excessive load can be avoided; in the process of manual driving, after the user drives the casing to rotate a certain angle, in order to facilitate the user to apply force, the user can drive the casing to rotate in the opposite direction, and in the direction of rotation of the casing, the ratchet member 3 and the pawl 35 form a sliding fit, and the ratchet member 3 and the head shell 12 can rotate relative to each other; secondly, in the process of manual driving, the reversing function can also be achieved by replacing the working surface on which the output head 5 is installed.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An electric ratchet wrench, comprising a housing, the housing comprising a receiving chamber and a head housing spliced ​​to each other, a drive motor is installed in the receiving chamber, the output shaft of the drive motor extends to the head housing, a ratchet mechanism and a transmission shaft connected in a transmission manner are arranged in the head housing, the ratchet mechanism is connected to an output head for driving a workpiece, the output shaft of the drive motor is connected to the ratchet mechanism in a transmission manner through a transmission shaft, and is characterized in that: The ratchet mechanism includes a ratchet member and a pawl. The ratchet member is slidably mounted on the end of the head shell. The ratchet member cooperates with the pawl to limit the ratchet member to rotate only in one direction. The ratchet member has a rotation axis. In the direction of the rotation axis, the surfaces of both ends of the ratchet member are provided with sockets for the output head to extend into. The output head is detachably connected to the socket and rotates synchronously with the ratchet member.

2. An electric ratchet wrench according to claim 1, characterized in that: The insertion holes at both ends of the ratchet member are communicated with each other.

3. The electric ratchet wrench according to claim 1, characterized in that: The output head comprises a connection end and an output end. A mounting groove is arranged on the side wall of the jack. A magnetic attraction piece is fixed in the mounting groove. The output head extends into the jack so that the magnetic attraction piece can adsorb the connection end.

4. The electric ratchet wrench according to claim 1, characterized in that: The ratchet mechanism also includes a reset member, the outer peripheral side of the ratchet member is provided with ratchet teeth meshing with the pawl, a sliding groove for the pawl to slide is provided in the head shell, the reset member is limited between the pawl and the sliding groove, and the reset member acts on the pawl so that the pawl has a movement tendency to maintain meshing with the ratchet teeth.

5. The electric ratchet wrench according to claim 1, characterized in that: The ratchet component includes an upper ratchet and a lower ratchet, one side of the upper ratchet forms an upper working surface, a connecting column extends from the side of the upper ratchet facing away from the upper working surface, one side of the lower ratchet forms a lower working surface, a slot is provided on the side of the lower ratchet facing away from the lower working surface, and the connecting column is plugged into the slot to achieve anti-rotation cooperation between the upper ratchet and the lower ratchet.

6. An electric ratchet wrench according to claim 5, characterized in that: The outer diameter of the connecting column is smaller than the outer diameter of the upper working surface. A first bevel gear is provided on the side of the upper ratchet facing the lower ratchet or on the side of the lower ratchet facing the upper ratchet. The first bevel gear is distributed on the outer peripheral side of the connecting column. A second bevel gear meshing with the first bevel gear is provided at the end of the transmission shaft.

7. An electric ratchet wrench according to claim 6, characterized in that: The first bevel gear and the upper ratchet or the lower ratchet are an integrated structure.

8. The electric ratchet wrench according to claim 1, characterized in that: The ratchet wheel is an integrated structure, and the ratchet wheel is provided with an annular groove distributed on the outer peripheral side of the socket, the groove wall of the annular groove is provided with a first bevel gear, and the end of the transmission shaft is provided with a second bevel gear. The end of the transmission shaft extends into the annular groove to keep the first bevel gear and the second bevel gear engaged.

9. The electric ratchet wrench according to claim 1, characterized in that: The head shell includes a working part and a connecting part, the connecting part is detachably connected to the accommodating bin, the working part is located at an end of the connecting part away from the accommodating bin, a first through hole for installing a transmission shaft is formed inside the connecting part, the working part is provided with a second through hole connected to the first through hole, the second through hole penetrates the working part in a vertical direction of the first through hole, and the ratchet part is rotatably installed on the inner wall of the second through hole.

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