Electric ratchet wrench

Abstract

The utility model discloses an electric ratchet wrench, which belongs to the technical field of ratchet wrenches, solves the problem that an output shaft of a driving motor can generate larger resistance to rotation when the ratchet wrench rotates in the manual operation process, and adopts the technical scheme that the electric ratchet wrench mainly comprises a containing bin and a head shell, a ratchet mechanism and a transmission shaft are arranged in the head shell, a one-way clutch and a first reset piece are arranged between the transmission shaft and the output shaft, the one-way clutch is matched with the output shaft in a rotation stopping mode and can move in the axial direction of the transmission shaft, and the other end of the one-way clutch abuts against the transmission shaft and keeps transmission connection with the transmission shaft. The output shaft is in transmission connection with the transmission shaft; when the transmission shaft serves as a driving end, the one-way clutch blocks power transmission between the output shaft and the transmission shaft. The power transmission between the output shaft and the transmission shaft can be blocked through the one-way clutch, so that the resistance of the output shaft to the transmission shaft can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model discloses an electric ratchet wrench belongs to ratchet wrench technical field. BACKGROUND

[0002] The ratchet wrench is a kind of one-way effective disassembly tool, mainly used for the tight operation of screw, and its application is more universal, and it is familiar and common to the public.

[0003] And the existing electric ratchet wrench usually includes head shell and handle, and ratchet assembly and driving mechanism are respectively arranged in head shell and handle, wherein the driving mechanism further includes driving motor, the output shaft of driving motor is connected with transmission shaft, the ratchet assembly includes ratchet ring and pawl, eccentric push block is arranged on transmission shaft, ratchet ring is driven to rotate by the rotation of eccentric push block, pawl is arranged in one of the rotation directions of ratchet ring to limit the relative rotation of ratchet ring and head shell, and the other rotation direction of ratchet ring is slidingly matched with pawl to enable the relative rotation of ratchet ring and head shell, thereby realizing the one-way output of power.

[0004] The electric ratchet wrench has two use modes, electric drive and manual drive, when user operates ratchet wrench by electric drive, driving motor drives ratchet ring to rotate forward, when ratchet ring rotates along forward direction, ratchet ring is slidingly matched with pawl, and ratchet ring rotates relative to head shell, when user operates ratchet wrench by manual drive, user rotates ratchet ring along reverse direction, at this time, ratchet ring is limitedly matched with pawl, and ratchet ring rotates synchronously with head shell, and after rotating a certain angle, user drives handle to rotate along the forward direction of ratchet ring, and in the process of rotation, ratchet ring rotates relative to head shell, and ratchet ring drives transmission shaft to rotate, and transmission shaft also drives output shaft to rotate, in the process, the output shaft of driving motor generates resistance moment to the rotation of ratchet ring, so that the resistance of handle rotation is large, and it is laborious, and it is easy to affect the use experience of user. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of electric ratchet wrenchs, the power transmission between output shaft and transmission shaft can be blocked by one-way clutch, and then the resistance of output shaft to transmission shaft can be reduced.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides an electric ratchet wrench, including casing, the casing includes the containing bin and head casing of mutual splicing, and the drive motor is installed in the containing bin, and the output shaft of drive motor extends to the head casing, and the ratchet mechanism and transmission shaft of drive connection are equipped in the head casing, and transmission shaft is with the drive motor's output shaft drive connection, be equipped with one -way clutch and first reset member between transmission shaft and output shaft, one -way clutch with transmission shaft and the rotation of one of output shaft is stopped and can along the axial movement of transmission shaft, and first reset member acts on one -way clutch to make one -way clutch with transmission shaft and the other of output shaft is resisted and keeps drive connection, and the output shaft is as drive end, and the output shaft and transmission shaft keep drive connection through one -way clutch, and transmission shaft is as drive end, and one -way clutch blocks the power transmission of output shaft and transmission shaft.

[0008] The utility model discloses a beneficial effect is:

[0009] The utility model discloses the output shaft is connected with one -way clutch between transmission shaft, when electric ratchet wrench is driven by drive motor, the output shaft of drive motor is drive end, the output shaft and transmission shaft keep drive connection through one -way clutch at this time, and the torque of drive motor can be transmitted to transmission shaft, and the ratchet mechanism is driven by transmission shaft and rotates relative to the head casing, and then realizes the electric drive of electric ratchet wrench, and when the user manually drives electric ratchet wrench, the user needs to control the reverse rotation of casing after every certain angle rotation, and in the process of turning back, the ratchet mechanism and the head casing produce relative rotation, and the ratchet mechanism also drives transmission shaft to rotate, the output shaft is drive end at this time, and one -way clutch can block the power transmission of output shaft and transmission shaft, and then break the resistance of output shaft to transmission shaft, help to reduce the resistance that transmission shaft receives in the process of rotating, make the user control casing turn back more labor saving, can improve the work efficiency in the process of user manual operation, can also provide the user's use experience feeling.

[0010] As preferred, one end of the one-way clutch is provided with a positioning groove, the output shaft extends into the positioning groove and is in rotation-stopping cooperation with the one-way clutch, and the first reset member is limited between the inner wall of the positioning groove and the output shaft, so that the one-way clutch has a movement tendency of abutting against the transmission shaft, and the other end of the one-way clutch is engaged with the transmission shaft. By the foregoing technical scheme, the positioning groove can be used for the output shaft to accurately extend into and realize rotation-stopping cooperation, so as to ensure that the one-way clutch can rotate synchronously with the output shaft, thereby helping to improve the stability and accuracy of the output shaft transmission; in addition, the first reset member can make the one-way clutch closely adhere to the transmission shaft, so as to ensure the stable engagement of the one-way clutch and the transmission shaft, thereby making the transmission of the one-way clutch and the transmission shaft more stable and reliable when the output shaft is the power end, and reducing the possibility of slippage of the one-way clutch and the transmission shaft; furthermore, the first reset member is limited between the inner wall of the positioning groove and the output shaft, so that the first reset member can be accurately positioned, thereby avoiding the phenomenon that the first reset member is separated.

[0011] As preferred, the end of the one-way clutch and the transmission shaft are provided with a plurality of teeth, each of which has an engagement tooth surface and a disengagement tooth surface, when the output shaft is the driving end, the engagement tooth surface of the one-way clutch acts on the engagement tooth surface of the transmission shaft to keep the one-way clutch and the transmission shaft engaged, and when the transmission shaft is the driving end, the disengagement tooth surface of the transmission shaft acts on the disengagement tooth surface of the one-way clutch to make the one-way clutch away from the transmission shaft.

[0012] As preferred, the engagement tooth surface is parallel to the axial direction of the one-way clutch, and the disengagement tooth surface is inclined and intersects with the axial direction of the one-way clutch. With the foregoing technical solution, since the engagement tooth surface is parallel to the axial direction of the one-way clutch, when the two engagement tooth surfaces act on each other, the force is perpendicular to the axial direction of the one-way clutch, and the force has no component in the axial direction of the one-way clutch, so when the one-way clutch drives the transmission shaft to rotate, no force in the axial direction of the one-way clutch is generated, and at this time, the elastic force of the first return member can keep the one-way clutch and the transmission shaft in close contact, which can ensure that the one-way clutch and the transmission shaft are stably connected, so that the power transmission is more stable and reliable; when the two disengagement tooth surfaces act on each other, since the disengagement tooth surface is inclined, the force of the transmission shaft acting on the one-way clutch has a component in the axial direction of the one-way clutch, and when the component is greater than the elastic force of the first return member, the one-way clutch can be pushed away from the transmission shaft to make the one-way clutch and the transmission shaft separate from each other, thereby blocking the power transmission between the transmission shaft and the output shaft and reducing the resistance torque of the output shaft to the transmission shaft.

[0013] As preferred, one end of the one-way clutch is rotationally connected with the transmission shaft, and the first return member is limited between the transmission shaft and the one-way clutch, so that the one-way clutch has a movement tendency of abutting against the output shaft, and the other end of the one-way clutch is engaged with the output shaft.

[0014] As preferred, the ratchet mechanism is installed at the end of the head shell away from the accommodating cavity, and the ratchet mechanism comprises a ratchet member and a pawl, the outer circumferential side of the ratchet member is provided with a ratchet tooth engaged with the pawl, the pawl and the ratchet tooth cooperate to limit the ratchet member to rotate in only one direction, the rotation axis of the ratchet member is perpendicular to the axial direction of the transmission shaft, and the ratchet member has an upper working surface and a lower working surface, each of which is provided with a insertion hole for the output head of the driving workpiece to extend into. With the foregoing technical solution, the ratchet member and the pawl cooperate to limit the ratchet member to rotate in only one direction, since the relative rotation between the ratchet member and the head shell needs to be limited under manual driving, and the relative rotation between the ratchet member and the head shell needs to be kept under electric driving, the upper working surface and the lower working surface can correspond to different operating states of the electric ratchet wrench respectively to meet different needs of users, and at the same time, the overall structure of the electric ratchet wrench can be made simpler and the operation can be made more convenient.

[0015] As preferred, the end of the transmission shaft towards the ratchet member is provided with a bevel gear, the outer periphery of the ratchet member is provided with a ring groove for the end of the transmission shaft to extend into, and the groove wall of the ring groove is engaged with the bevel gear of the transmission shaft to realize the transmission connection between the ratchet member and the transmission shaft.

[0016] As preferred, the ratchet member comprises a fixedly connected upper ratchet and lower ratchet, the upper surface of the upper ratchet is an upper working surface, the lower surface of the lower ratchet is a lower working surface, and the insertion holes of the upper working surface and the lower working surface are communicated. With the foregoing technical scheme, the insertion holes of the upper working surface and the lower working surface are communicated, that is, the whole insertion hole penetrates through the upper ratchet and the lower ratchet, so that the insertion hole does not limit the output head, and the ratchet member can be applied to more different types of output heads, which helps to improve the application range of the electric ratchet wrench.

[0017] As preferred, the two opposite inner walls of the insertion hole are provided with mounting grooves, and a magnetic attraction member is mounted in the mounting grooves. With the foregoing technical scheme, the magnetic attraction member can attract the output head of the driven workpiece, which helps to improve the connection stability of the ratchet member and the output head, reduces the possibility of slippage of the output head when driving the workpiece, makes the operation of the workpiece of the electric ratchet wrench more labor-saving, and helps to improve the user experience.

[0018] As preferred, the outer periphery of the transmission shaft is provided with a clamping groove, a limiting member is mounted in the clamping groove, the inner wall of the head shell is provided with a stepped surface, the transmission shaft is sleeved with a bearing, and the bearing is limited between the stepped surface and the limiting member. With the foregoing technical scheme, the bearing is sleeved on the outer periphery of the transmission shaft, so as to separate the transmission shaft from the inner wall of the head shell, avoid direct contact between the transmission shaft and the head shell, protect the transmission shaft, reduce the possibility of wear of the transmission shaft, and help to prolong the service life of the transmission shaft. In addition, the bearing can also position the transmission shaft, reduce the possibility of shaking of the transmission shaft, and make the movement of the transmission shaft more stable and reliable.

[0019] Other features and advantages of the present application will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below with reference to the drawings:

[0021] Figure 1 It is an exploded view of the electric ratchet wrench of the present application;

[0022] Figure 2 It is an exploded view of the transmission shaft and the one-way clutch in the electric ratchet wrench of the present application;

[0023] Figure 3 It is a sectional view of the electric ratchet wrench of the present application;

[0024] Figure 4 It is a sectional view of the transmission shaft and the ratchet mechanism in the electric ratchet wrench of the utility model;

[0025] Figure 5 It is a side view of the transmission shaft and the ratchet mechanism in the electric ratchet wrench of the utility model;

[0026] Figure 6 It is a schematic structural view of the ratchet mechanism in the electric ratchet wrench of the utility model.

[0027] The drawings show: 11, accommodating bin; 12, head shell; 13, power supply assembly; 14, switch button; 2, driving motor; 21, output shaft; 22, transmission shaft; 221, bevel gear; 222, clamping groove; 223, limiting piece; 224, bearing; 3, ratchet piece; 31, upper ratchet; 311, upper working surface; 32, lower ratchet; 321, lower working surface; 33, insertion hole; 34, magnetic attraction piece; 35, pawl; 351, second reset piece; 4, one-way clutch; 41, tooth; 411, meshing tooth surface; 412, disengaging tooth surface; 42, positioning groove; 43, first reset piece. DETAILED DESCRIPTION

[0028] The technical scheme of the utility model embodiment is explained and described below in combination with the drawings of the utility model embodiment, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without making creative efforts all belong to the protection scope of the utility model.

[0029] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model.

[0030] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly limited.

[0031] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0032] As Figures 1 to 6 The utility model discloses an electric ratchet wrench, including the casing, the casing includes the containing bin 11 and the head shell 12 that splice each other, wherein the drive motor 2 and power pack 13 are installed in containing bin 11, the outer surface of containing bin 11 is installed with switch button 14, power pack 13 provides power for drive motor 2, switch button 14 controls the start-stop of drive motor 2, the output shaft 21 of drive motor 2 penetrates containing bin 11 and extends into the head shell 12, the ratchet mechanism and transmission shaft 22 are installed in the head shell 12, the both ends of transmission shaft 22 are output shaft 21 and ratchet mechanism transmission connection respectively, the ratchet mechanism includes ratchet wheel 3 and pawl 35, and ratchet wheel 3 cooperates with pawl 35 to limit ratchet wheel 3 to rotate only in one direction, and the rotation axis of ratchet wheel 3 keeps perpendicular with the axial direction of transmission shaft 22, and one-way clutch 4 and first reset piece 43 are equipped between transmission shaft 22 and output shaft 21, wherein one end of one-way clutch 4 is rotationally engaged with output shaft 21, and the other end is transmission connection with transmission shaft 22, and first reset piece 43 is limited between one-way clutch 4 and output shaft 21, and first reset piece 43 acts on one-way clutch 4 to make one-way clutch 4 have the movement tendency towards transmission shaft 22, so that one-way clutch 4 keeps close to transmission shaft 22.

[0033] The electric ratchet wrench has two use modes, electric drive and manual drive, when the electric ratchet wrench is in the electric drive state, the user controls drive motor 2 to start by pressing switch button 14 on the surface of containing bin 11, drive motor 2 drives output shaft 21 to rotate, one-way clutch 4 rotates synchronously with output shaft 21, at this time, output shaft 21 is the drive end, output shaft 21 keeps transmission connection with transmission shaft 22 through one-way clutch 4, so that the power of drive motor 2 can be smoothly transmitted to transmission shaft 22, and transmission shaft 22 drives ratchet wheel 3 to rotate, at this time, ratchet wheel 3 is in sliding cooperation with pawl 35 under the drive of transmission shaft 22, thereby realizing the rotation of ratchet wheel 3 relative to the head shell 12, ratchet wheel 3 can automatically drive the output head to rotate, without manual operation of the user, which can greatly improve the work efficiency of the user, and also makes the work of the user more relaxed and labor-saving, and helps to improve the use experience of the user.

[0034] When the electric ratchet wrench is in the manual driving state, the driving motor 2 in the containing bin 11 is not started, the user manually controls the overall shell to drive the workpiece to rotate, and in the rotating direction of the shell, the ratchet wheel 3 and the pawl 35 form a limiting fit to make the ratchet wheel 3 and the head shell 12 remain relatively fixed, so that the user can rotate the shell to drive the workpiece to rotate, and manual driving can make the installation of the workpiece more compact, and can also loosen the stuck workpiece, which can avoid the possibility of damage of the driving motor 2 due to excessive load; after the user rotates the shell by a certain angle, in order to make the user easily exert force, the user can rotate the shell in the opposite direction, and in the rotating direction of the shell, the ratchet wheel 3 and the pawl 35 form a sliding fit, the ratchet wheel 3 and the head shell 12 can rotate relatively, and the transmission shaft 22 will also rotate under the action of the ratchet wheel 3, at this time the transmission shaft 22 is the driving end, and the one-way clutch 4 blocks the power transmission between the output shaft 21 and the transmission shaft 22, so that the transmission shaft 22 and the output shaft 21 rotate relatively, that is, the output shaft 21 will not rotate with the transmission shaft 22, thereby blocking the resistance of the output shaft 21 to the transmission shaft 22, which helps to reduce the resistance of the transmission shaft 22 during rotation, making it easier for the user to control the shell to rotate, which can improve the working efficiency of the user during manual operation, and also provides a good user experience.

[0035] Of course, it can be understood that in other embodiments, one end of the one-way clutch 4 can also be in rotational stop fit with the transmission shaft 22, and the first reset member 43 is limited between the transmission shaft 22 and the one-way clutch 4, so that the one-way clutch 4 has a movement tendency opposite to the output shaft 21, and the other end of the one-way clutch 4 can also be in meshing fit with the output shaft 21.

[0036] As shown in Figure 2 The end of the one-way clutch 4 and the transmission shaft 22 abutting each other in the embodiment is provided with a plurality of teeth 41, each tooth 41 has an engagement tooth surface 411 and a disengagement tooth surface 412, wherein the engagement tooth surface 411 is parallel to the axial direction of the one-way clutch 4, and the disengagement tooth surface 412 is inclined and intersects the axial direction of the one-way clutch 4, when the output shaft 21 is the driving end, the engagement tooth surface 411 of the one-way clutch 4 acts on the engagement tooth surface 411 of the transmission shaft 22, so that the one-way clutch 4 and the transmission shaft 22 remain in meshing fit; when the transmission shaft 22 is the driving end, the disengagement tooth surface 412 of the transmission shaft 22 acts on the disengagement tooth surface 412 of the one-way clutch 4, so that the one-way clutch 4 is away from the transmission shaft 22.

[0037] Since the meshing tooth surfaces 411 remain parallel to the axial direction of the one-way clutch 4, when the two meshing tooth surfaces 411 interact, the force is perpendicular to the axial direction of the one-way clutch 4, and the force has substantially no component in the axial direction of the one-way clutch 4, so when the one-way clutch 4 drives the transmission shaft 22 to rotate, no force in the axial direction of the one-way clutch 4 is generated, and at this time, the elastic force of the first return member 43 can keep the one-way clutch 4 in close contact with the transmission shaft 22, so as to ensure that the one-way clutch 4 and the transmission shaft 22 are stably connected, and the power transmission is more stable and reliable; when the two disengaging tooth surfaces 412 interact, since the disengaging tooth surfaces 412 are inclined, the force of the transmission shaft 22 acting on the one-way clutch 4 has a component in the axial direction of the one-way clutch 4, and when the component is greater than the elastic force of the first return member 43, the one-way clutch 4 can be pushed away from the transmission shaft 22 to separate the one-way clutch 4 from the transmission shaft 22, thereby blocking the power transmission between the transmission shaft 22 and the output shaft 21, and reducing the resistance torque generated by the output shaft 21 on the transmission shaft 22; in the embodiment, the one-way clutch 4 is matched with the meshing tooth surfaces 411 and the disengaging tooth surfaces 412, so that even if the positions of the driving end change, the one-way power transmission can still be realized when the rotation directions are the same.

[0038] As shown in Figure 3 the one-way clutch 4 is provided with a positioning groove 42 at one end away from the tooth 41, the output shaft 21 extends into the positioning groove 42 and is rotationally stopped with the one-way clutch 4, the first return member 43 is installed in the positioning groove 42 and is limited between the inner wall of the positioning groove 42 and the output shaft 21, and the first return member 43 acts on the one-way clutch 4 to make the one-way clutch 4 have a movement tendency to keep abutting against the transmission shaft 22, so as to ensure that the one-way clutch 4 can keep meshing with the transmission shaft 22 to realize transmission connection, the positioning groove 42 can make the output shaft 21 accurately extend into and realize rotationally stopping, so as to ensure that the one-way clutch 4 can rotate synchronously with the output shaft 21, which helps to improve the stability and accuracy of the output shaft 21 transmission; in addition, the first return member 43 can keep the one-way clutch 4 in close contact with the transmission shaft 22, so as to ensure the stable meshing of the one-way clutch 4 and the transmission shaft 22, and when the output shaft 21 is the driving end, the transmission of the one-way clutch 4 and the transmission shaft 22 is more stable and reliable, and the possibility of slipping of the one-way clutch 4 and the transmission shaft 22 is reduced; secondly, the first return member 43 is limited between the inner wall of the positioning groove 42 and the output shaft 21, so as to realize accurate positioning of the first return member 43 and avoid disengagement of the first return member 43.

[0039] In addition, in order to enable the one-way clutch 4 to be in a rotation-stopping fit with the output shaft 21, the cross section of the output shaft 21 is in a D shape in the embodiment, the cross section of the positioning groove 42 matches the cross section of the output shaft 21, and in order to enable the one-way clutch 4 to slide in the axial direction of the output shaft 21, there is a gap between the inner wall of the positioning groove 42 and the outer surface of the output shaft 21, so that the positioning groove 42 does not tightly fit with the output shaft 21, thereby avoiding that the one-way clutch 4 has a large sliding resistance.

[0040] As shown in Figure 3 the outer periphery of the transmission shaft 22 is provided with a clamping groove 222, the clamping groove 222 is provided with a limiting piece 223, the inner wall of the head shell 12 is provided with a stepped surface, the transmission shaft 22 is sleeved with a bearing 224, the bearing 224 is limited between the stepped surface and the limiting piece 223, the bearing 224 is sleeved on the outer periphery of the transmission shaft 22, thereby separating the transmission shaft 22 from the inner wall of the head shell 12, avoiding direct contact between the transmission shaft 22 and the head shell 12, protecting the transmission shaft 22, reducing the possibility of wear of the transmission shaft 22, and prolonging the service life of the transmission shaft 22; in addition, the bearing 224 can also position the transmission shaft 22, reduce the possibility of shaking of the transmission shaft 22, and make the movement of the transmission shaft 22 more stable and reliable.

[0041] As shown in Figures 4 to 6 the ratchet mechanism is installed at the end of the head shell 12 away from the accommodating bin 11, the outer periphery of the ratchet piece 3 is provided with a ratchet tooth engaged with the pawl 35, the head shell 12 is further provided with a second reset piece 351 acting on the pawl 35, so that the pawl 35 has a tendency to engage with the ratchet tooth, thereby ensuring that the ratchet piece 3 and the pawl 35 can be connected, the ratchet piece 3 has an upper working surface 311 and a lower working surface 321, both of which are provided with a hexagonal insertion hole 33 for the output head of the driving workpiece to extend into, the rotation axis of the insertion hole 33 coincides with the rotation axis of the ratchet piece 3, the ratchet piece 3 is limited to rotate in only one direction by cooperating with the pawl 35, since the relative rotation between the ratchet piece 3 and the head shell 12 needs to be limited under manual driving, and the relative rotation between the ratchet piece 3 and the head shell 12 needs to be maintained under electric driving, the upper working surface 311 and the lower working surface 321 can correspond to different operating states of the electric ratchet wrench respectively, so as to meet different needs of users, and at the same time, the overall structure of the electric ratchet wrench can be simpler and the operation can be more convenient; in addition, different working surfaces can also realize different rotation directions of work under the same working state, so as to realize the installation and disassembly of work.

[0042] In order to reduce the possibility of the output head from the socket 33, the two inner walls of the socket 33 in the embodiment are provided with mounting grooves, and the mounting grooves are provided with magnetic attraction members 34. The magnetic attraction members 34 can attract the output head for driving the workpiece, which helps to improve the connection stability of the ratchet member 3 and the output head, reduces the possibility of slipping of the output head when driving the workpiece, makes the electric ratchet wrench operate the workpiece more easily, and helps to improve the user experience.

[0043] As shown in Figure 4 and Figure 5 , the ratchet member 3 in the embodiment includes an upper ratchet 31 and a lower ratchet 32 fixedly connected. The upper surface of the upper ratchet 31 is an upper working surface 311, and the lower surface of the lower ratchet 32 is a lower working surface 321. The socket 33 of the upper working surface 311 is in communication with the lower working surface 321. The sockets 33 of the upper working surface 311 and the lower working surface 321 are in communication, that is, the whole socket 33 penetrates the upper ratchet 31 and the lower ratchet 32 at the same time. Therefore, the socket 33 will not limit the output head, so that the ratchet member 3 can be applied to more different types of output heads, and helps to improve the application range of the electric ratchet wrench.

[0044] As shown in Figure 5 , the end of the transmission shaft 22 towards the ratchet member 3 is provided with a bevel gear 221. The upper ratchet 31 and the lower ratchet 32 are provided with a ring groove for the end of the transmission shaft 22 to extend into. The groove wall of the ring groove is engaged with the bevel gear 221 of the transmission shaft 22 to realize the transmission connection between the ratchet member 3 and the transmission shaft 22. The transmission shaft 22 and the ratchet member 3 are connected through the bevel gear 221. The bevel gear 221 can change the rotation plane of the transmission shaft 22 and the ratchet member 3.

[0045] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification of the function and structure principle without deviating from the present application will be included in the scope of the claims.

Claims

1. An electric ratchet wrench, comprising a housing, the housing including a receiving chamber and a head shell joined together, a drive motor installed in the receiving chamber, the output axis of the drive motor extending into the head shell, and a ratchet mechanism and a drive shaft connected in a transmission connection being provided in the head shell, the drive shaft being connected in a transmission connection to the output shaft of the drive motor, characterized in that, The single-way clutch is arranged at one end of the transmission shaft and is in rotation-stopping cooperation with one of the transmission shaft and the output shaft and is movable along the axial direction of the transmission shaft, and the first reset member acts on the single-way clutch to make the single-way clutch abut against the other one of the transmission shaft and the output shaft and keep driving connection, and when the output shaft is the driving end, the output shaft and the transmission shaft keep driving connection through the single-way clutch; and when the transmission shaft is the driving end, the single-way clutch blocks the power transmission between the output shaft and the transmission shaft.

2. The electrically powered ratchet wrench of claim 1, wherein One end of the single-way clutch is provided with a positioning groove, the output shaft extends into the positioning groove and is in rotation-stopping cooperation with the single-way clutch, and the first reset member is limited between the inner wall of the positioning groove and the output shaft to make the single-way clutch have a movement tendency of abutting against the transmission shaft, and the other end of the single-way clutch is engaged with the transmission shaft.

3. The electrically powered ratchet wrench of claim 2 wherein, The end of the single-way clutch and the transmission shaft abutting against each other are provided with a plurality of teeth, each of the teeth has an engagement tooth surface and a disengagement tooth surface, when the output shaft is the driving end, the engagement tooth surface of the single-way clutch acts on the engagement tooth surface of the transmission shaft to make the single-way clutch keep engagement with the transmission shaft; and when the transmission shaft is the driving end, the disengagement tooth surface of the transmission shaft acts on the disengagement tooth surface of the single-way clutch to make the single-way clutch move away from the transmission shaft.

4. The electrically powered ratchet wrench of claim 3 wherein, The engagement tooth surface keeps parallel with the axial direction of the single-way clutch, and the disengagement tooth surface is inclined and intersects with the axial direction of the single-way clutch.

5. The electrically powered ratchet wrench of claim 1, wherein, One end of the single-way clutch is in rotation-stopping cooperation with the transmission shaft, and the first reset member is limited between the transmission shaft and the single-way clutch to make the single-way clutch have a movement tendency of abutting against the output shaft, and the other end of the single-way clutch is engaged with the output shaft.

6. The electrically powered ratchet wrench of claim 1, wherein, The ratchet mechanism is mounted at the end of the head shell away from the accommodating cavity, the ratchet mechanism comprises a ratchet member and a pawl, the outer circumferential side of the ratchet member is provided with a ratchet tooth engaged with the pawl, the pawl cooperates with the ratchet tooth to limit the ratchet member to rotate in only one direction, the rotation axis of the ratchet member is perpendicular to the axial direction of the transmission shaft, and the ratchet member has an upper working surface and a lower working surface, and the upper working surface and the lower working surface are provided with insertion holes for the output head of the driving workpiece to extend into.

7. The electrically powered ratchet wrench of claim 6 wherein, The end of the transmission shaft towards the ratchet member is provided with a bevel gear, the outer circumferential side of the ratchet member is provided with a ring groove for the end of the transmission shaft to extend into, and the groove wall of the ring groove is engaged with the bevel gear of the transmission shaft to realize the driving connection between the ratchet member and the transmission shaft.

8. The electrically powered ratchet wrench of claim 6 wherein, The ratchet member comprises a fixedly connected upper ratchet and a lower ratchet, the upper surface of the upper ratchet is the upper working surface, the lower surface of the lower ratchet is the lower working surface, and the insertion holes of the upper working surface and the lower working surface are connected in communication.

9. The electrically powered ratchet wrench of claim 6 wherein, The two opposite inner walls of the insertion hole are provided with mounting grooves, and magnetic attraction members are mounted in the mounting grooves.

10. The electrically powered ratchet wrench of claim 1, wherein, The outer circumferential side of the transmission shaft is provided with a clamping groove, a limiting member is mounted in the clamping groove, the inner wall of the head shell is provided with a stepped surface, the transmission shaft is sleeved with a bearing, and the bearing is limited between the stepped surface and the limiting member.

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