Electric ratchet wrench

Abstract

The invention discloses an electric ratchet wrench, belongs to the field of electric ratchet wrenches, solves the problem that a head shell of the electric ratchet wrench is difficult to replace, and adopts the technical scheme that the electric ratchet wrench mainly comprises a containing bin provided with a driving motor and the head shell provided with a transmission shaft, and the containing bin is detachably connected with the head shell; the containing bin is provided with a threaded column in threaded connection with the head shell, a locking piece is arranged between the threaded column and the head shell, the head shell is provided with a first through hole for the locking piece to slide, at least part of the locking piece penetrates through the first through hole to be exposed out of the outer side of the head shell, the threaded column is provided with a positioning groove, and the locking piece slides in and out of the positioning groove along the first through hole. The locking piece enters the positioning groove to limit relative rotation of the head shell and the threaded column, a clutch is arranged between an output shaft of the driving motor and the transmission shaft, the output shaft and the transmission shaft are in transmission connection through the clutch, and the clutch can be separated in the axial direction to block power transmission. The invention is mainly used for quickly replacing the head shell to use ratchet wheel assemblies of different sizes.

Description

Technical Field

[0001] The present 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. Its application is relatively common and well-known and familiar to the public.

[0003] Currently, the existing electric ratchet wrenches generally include a head shell and a handle. A ratchet assembly and a driving mechanism are respectively arranged in the head shell and the handle. The driving mechanism further includes a driving motor. The output shaft of the driving motor is connected with a transmission shaft. The ratchet assembly includes a ratchet ring and a pawl. An eccentric push block is arranged on the transmission shaft. The rotation of the eccentric push block drives the ratchet ring to rotate. The ratchet ring is limited by the pawl in one rotation direction to restrict the relative rotation between the ratchet ring and the head shell. In the other rotation direction, the ratchet ring and the pawl are in sliding fit so that the ratchet ring can generate relative rotation with the head shell, thereby realizing the one-way output of power.

[0004] However, in the prior art, the connection between the output shaft and the transmission shaft cannot be simply disassembled, and the reconnection after disassembly is also relatively complicated. Therefore, it is difficult for an electric ratchet wrench to replace the ratchet assembly of different sizes by replacing the head shell, resulting in a relatively single use scenario for the electric ratchet wrench and it being difficult to cover a variety of use scenarios. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that it is difficult to replace the head shell of an electric ratchet wrench. For this reason, an electric ratchet wrench is provided, which can quickly replace the head shell to use ratchet assemblies of different sizes.

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

[0007] An electric ratchet wrench includes a housing. The housing includes a receiving chamber with a driving motor installed therein and a head shell with a transmission shaft installed therein. The receiving chamber and the head shell are detachably connected. The receiving chamber is provided with a threaded column that is threadedly connected to the head shell. A locking member is arranged between the threaded column and the head shell. The head shell is provided with a first through hole for the locking member to slide. At least part of the locking member passes through the first through hole and exposes outside the head shell. The threaded column is provided with a positioning groove. The locking member slides in and out of the positioning groove along the first through hole. When the locking member enters the positioning groove, the relative rotation between the head shell and the threaded column is restricted. A clutch is arranged between the output shaft of the driving motor and the transmission shaft. The output shaft and the transmission shaft are in transmission connection through the clutch. The clutch can be separated along the axial direction to block the power transmission.

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

[0009] In the present invention, the receiving bin is threadedly connected to the head shell through threaded posts. A locking member is provided between the threaded posts and the head shell. A positioning groove is provided on the threaded posts. When the locking member enters the positioning groove, the locking member simultaneously enters the first through hole of the head shell and the positioning groove of the threaded posts, thereby restricting the relative rotation between the head shell and the threaded posts, ensuring the stable connection between the head shell and the threaded posts, reducing the possibility of the head shell and the receiving bin being disengaged at will, and helping to improve the connection stability between the head shell and the receiving bin. When it is necessary to disassemble the head shell, control the locking member to slide along the first through hole so that the locking member disengages from the positioning groove, and the locking between the head shell and the threaded posts can be released, enabling the head shell to rotate relative to the threaded posts, so that the head shell can be easily disassembled from the receiving bin, realizing the quick disassembly of the head shell. After replacing the head shell with different sizes, the connection between the head shell and the receiving bin is realized again through the threaded posts, and the locking member is used to prevent the head shell from being disengaged from the receiving bin at will, so as to realize the quick replacement of the head shell, which helps to improve the applicable range of the electric ratchet wrench and enables the electric ratchet wrench to adapt to a variety of usage scenarios. Secondly, a clutch is provided between the transmission shaft and the output shaft. When the head shell and the receiving bin are kept connected, the transmission shaft and the output shaft are kept in transmission connection through the clutch, ensuring that the power of the driving motor can be stably transmitted to the ratchet assembly. When the head shell and the receiving bin are disassembled, the clutch can be separated in the axial direction, and the clutch will not interfere with the disassembly of the head shell and the receiving bin, so that the head shell can be quickly disassembled. After replacing the head shell, the transmission shaft and the output shaft can still be in transmission connection through the clutch to realize the quick connection between the head shell and the receiving bin and the quick replacement of the head shell.

[0010] Preferably, the locking member further includes a limiting plate, and the limiting plate forms a limiting fit with the bottom wall around the first through hole to limit the limiting plate from passing through the first through hole. With the above technical solution, the limiting plate and the bottom wall around the first through hole are in limiting fit, which can prevent the locking member from falling off during use and help to improve the connection stability between the locking member and the head shell. In addition, the limiting plate and the bottom wall around the first through hole can also limit the sliding of the locking member, ensure that the locking member can slide along the length direction of the first through hole, and make the sliding of the locking member smoother, reducing the possibility of the locking member being stuck with the first through hole.

[0011] Preferably, the length direction of the first through hole is parallel to the axial direction of the head shell, the notch of the positioning groove is distributed at the end of the threaded post, and a first reset member is provided in the first through hole. The first reset member acts on the locking member to make the locking member have a tendency to slide towards the positioning groove. With the above technical solution, the first reset member can automatically reset the locking member and keep the head shell and the threaded posts in a locked state. At the same time, it can also reduce the possibility of the locking member disengaging from the positioning groove at will, help to improve the stability of the locked state between the head shell and the threaded posts, and make the use of the electric ratchet wrench safer.

[0012] Preferably, the locking member is provided with a positioning protrusion. One end of the first reset member abuts against the inner wall of the first through hole, and the other end is positioned at the positioning protrusion. With the foregoing technical solution, the positioning protrusion can position the first reset member, reducing the possibility of the first reset member detaching from the locking member, so that the first reset member can maintain a stable and reliable acting force on the locking member.

[0013] Preferably, the locking member further includes a baffle and a turning knob. The operating member of the locking member passes through the first through hole and exposes outside the head shell. The baffle is provided with a through hole for the operating portion to pass through. The baffle is sleeved on the operating portion and is used to cover the first through hole. The turning knob is fixedly connected to the operating portion and restricts the baffle from detaching from the operating portion. With the foregoing technical solution, using the baffle to block the first through hole can improve the integrity of the outer shape of the head shell, which helps to improve the aesthetic degree of the head shell; in addition, the baffle can also prevent other sundries from entering the head shell through the first through hole, reducing the possibility of wear of the internal structure of the head shell due to external sundries, which helps to improve the service life of the internal structure of the head shell; secondly, the turning knob restricts the baffle, making the connection between the baffle and the locking member more stable and reliable, and the turning knob can also increase the volume of the operating portion, thereby facilitating the user to operate the locking member, which helps to improve the user experience.

[0014] Preferably, the clutch includes a first clutch member and a second clutch member that are respectively rotationally locked with the output shaft and the transmission shaft. The opposite ends of the first clutch member and the second clutch member are provided with meshing tooth portions.

[0015] Preferably, the first clutch member is fixedly connected to the output shaft, and the second clutch member is slidably connected to the transmission shaft. A second reset member is provided in the head shell to make the second clutch member have a tendency to abut against the first clutch member. A first convex ring is provided on the outer peripheral side of the second clutch member, and a limiting member is provided on the inner wall of the head shell. The limiting member is in limiting cooperation with the second convex ring to restrict the second clutch member from detaching from the transmission shaft.

[0016] Preferably, the second clutch member is fixedly connected to the transmission shaft, and a second reset member is provided between the first clutch member and the output shaft to make the first clutch member have a tendency to abut against the second clutch member. The threaded post is in limiting cooperation with the first clutch member to restrict the first clutch member from detaching from the output shaft.

[0017] Preferably, two bearings are installed at intervals along the axial direction on the inner wall of the head shell. The transmission shaft is rotationally engaged with the head shell through the bearings. A second convex ring is provided on the outer peripheral side of the transmission shaft, and the second convex ring is embedded between the two bearings. With the foregoing technical solution, the transmission shaft is rotationally connected to the head shell through the bearings, and at the same time, the bearings can also limit the relative sliding between the transmission shaft and the head shell to maintain the stable connection between the head shell and the transmission shaft; in addition, the second convex ring of the transmission shaft is restricted between the two bearings, which can further reduce the possibility of the transmission shaft sliding relative to the head shell in the axial direction, ensuring that the head shell can be in transmission connection with the ratchet assembly inside the head shell.

[0018] Preferably, a ratchet assembly is provided at the end of the head shell away from the accommodation chamber. The ratchet assembly is in transmission connection with the transmission shaft. The head shell is provided with a second through hole for the ratchet assembly to enter and exit, and the head shell is detachably connected with a cover plate for covering the second through hole.

[0019] 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

[0020] The following further describes the present invention with reference to the drawings:

[0021] Figure 1 is an exploded view of an electric ratchet wrench according to the present invention;

[0022] Figure 2 is an exploded view of a locking member in an electric ratchet wrench according to the present invention;

[0023] Figure 3 is a cross-sectional view of an electric ratchet wrench according to the present invention;

[0024] Figure 4 is Figure 3 a partial enlargement in Figure 1 ;

[0025] Figure 5 is Figure 3 a partial enlargement in Figure 2 ;

[0026] Figure 6 is a schematic structural view of the interior of the head shell in an electric ratchet wrench according to the present invention;

[0027] Figure 7 is a side view of the ratchet assembly and the transmission shaft in an electric ratchet wrench according to the present invention.

[0028] Reference numerals: 11, accommodation bin; 12, head shell; 121, cover plate; 122, first through hole; 13, threaded post; 131, positioning groove; 2, drive motor; 21, output shaft; 3, drive shaft; 31, second convex ring; 32, bearing; 4, locking member; 41, limiting plate; 42, operating portion; 43, positioning projection; 44, first reset member; 45, baffle; 451, through hole; 46, toggle; 51, upper ratchet member; 511, ratchet teeth; 52, lower ratchet member; 521, bevel gear; 53, ratchet pawl; 531, elastic washer; 54, magnet; 55, jack; 61, first clutch member; 611, first convex ring; 62, second clutch member; 63, second reset member; 64, limiting member; 7, battery. Detailed implementation manners

[0029] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] As Figures 1 to 7As shown in the figure, this embodiment discloses an electric ratchet wrench, which includes a housing. The housing includes a receiving chamber 11 where a driving motor 2 is installed and a head housing 12 where a transmission shaft 3 is installed. The receiving chamber 11 and the head housing 12 are detachably connected. The receiving chamber 11 is provided with a threaded post 13 that is threadedly connected to the head housing 12. A locking member 4 is provided between the threaded post 13 and the head housing 12. The head housing 12 is provided with a first through hole 122 for the locking member 4 to slide. At least a part of the locking member 4 passes through the first through hole 122 and exposes outside the head housing 12. The threaded post 13 is provided with a positioning groove 131. The locking member 4 slides in and out of the positioning groove 131 along the first through hole 122. When the locking member 4 enters the positioning groove 131, the relative rotation between the head housing 12 and the threaded post 13 is restricted. A clutch is provided between the output shaft 21 of the driving motor 2 and the transmission shaft 3. The output shaft 21 and the transmission shaft 3 are drivingly connected through the clutch. The clutch can be separated in the axial direction to block the power transmission.

[0033] In this embodiment, the receiving chamber 11 is threadedly connected to the head housing 12 through the threaded post 13. A locking member 4 is provided between the threaded post 13 and the head housing 12. The threaded post 13 is provided with a positioning groove 131. After the locking member 4 enters the positioning groove 131, the locking member 4 simultaneously enters the first through hole 122 of the head housing 12 and the positioning groove 131 of the threaded post 13, thereby restricting the relative rotation between the head housing 12 and the threaded post 13 to ensure the stable connection between the head housing 12 and the threaded post 13, reducing the possibility of the head housing 12 being randomly separated from the receiving chamber 11, and helping to improve the connection stability between the head housing 12 and the receiving chamber 11. When it is necessary to disassemble the head housing 12, control the locking member 4 to slide along the first through hole 122 to make the locking member 4 disengage from the positioning groove 131, then the locking between the head housing 12 and the threaded post 13 can be released, enabling the head housing 12 to rotate relative to the threaded post 13, so that the head housing 12 can be easily disassembled from the receiving chamber 11, realizing the quick disassembly of the head housing 12. After replacing the head housing 12 with different sizes, the head housing 12 and the receiving chamber 11 are connected again through the threaded post 13, and the locking member 4 is used to prevent the head housing 12 from randomly detaching from the receiving chamber 11, so as to realize the quick replacement of the head housing 12, which helps to expand the applicable range of the electric ratchet wrench and enables the electric ratchet wrench to adapt to a variety of usage scenarios. Secondly, a clutch is provided between the transmission shaft 3 and the output shaft 21. When the head housing 12 and the receiving chamber 11 are kept connected, the transmission shaft 3 and the output shaft 21 are drivingly connected through the clutch to ensure that the power of the driving motor 2 can be stably transmitted to the ratchet assembly. When the head housing 12 and the receiving chamber 11 are disassembled, the clutch can be separated in the axial direction, and the clutch will not interfere with the disassembly of the head housing 12 and the receiving chamber 11, so that the head housing 12 can be quickly disassembled. After replacing the head housing 12, the transmission shaft 3 and the output shaft 21 can still be drivingly connected through the clutch to realize the quick connection between the head housing 12 and the receiving chamber 11 and the quick replacement of the head housing 12.

[0034] AsFigure 1 and Figure 2 As shown in Figure 2 , in this embodiment, the length direction of the first through hole 122 is parallel to the axial direction of the head shell 12. After the head shell 12 is tightened with the threaded post 13, the positioning groove 131 is on the side of the threaded post 13 close to the first through hole 122, and the notch of the positioning groove 131 is distributed at the end of the threaded post 13. The locking member 4 slides along the length direction of the first through hole 122 so that the locking member 4 can enter or disengage from the positioning groove 131 through the notch. The top end of the locking member 4 passes through the first through hole 122 and exposes outside the head shell 12 to form an operation part 42. The middle part of the locking member 4 is inside the first through hole 122, and the width of the middle part of the locking member 4 is adapted to the width of the first through hole 122. Furthermore, the wobbling of the locking member 4 in the width direction of the first through hole 122 can be reduced, making the sliding of the locking member 4 in the first through hole 122 smoother. A limiting plate 41 is provided at the bottom end of the locking member 4, and the width of the limiting plate 41 is greater than the width of the first through hole 122, that is, the orthographic projection of the limiting plate 41 on the first through hole 122 is at least partially on the bottom wall around the first through hole 122. The limiting plate 41 and the bottom wall around the first through hole 122 form a limiting fit to limit the limiting plate 41 from passing through the first through hole 122. The limiting fit between the limiting plate 41 and the bottom wall around the first through hole 122 can prevent the locking member 4 from falling off during use, helping to improve the connection stability between the locking member 4 and the head shell 12. In addition, the limiting plate 41 and the bottom wall around the first through hole 122 can also play a role in restricting the sliding of the locking member 4, ensuring that the locking member 4 can slide along the length direction of the first through hole 122, and also making the sliding of the locking member 4 smoother, reducing the possibility of the locking member 4 getting stuck with the first through hole 122.

[0035] As Figure 2 and Figure 3 shown in Figure 3 , in this embodiment, a positioning protrusion 43 is provided on the part of the locking member 4 inside the first through hole 122. A first reset member 44 is provided inside the first through hole 122. The first reset member 44 is a spring. One end of the first reset member 44 abuts against the inner wall of the first through hole 122, and the other end is sleeved on the outer peripheral side of the positioning protrusion 43, so that the first reset member 44 and the positioning protrusion 43 form a positioning fit. The first reset member 44 can automatically reset the locking member 4 and keep the head shell 12 and the threaded post 13 in a locked state. At the same time, it can also reduce the possibility of the locking member 4 randomly disengaging from the positioning groove 131, helping to improve the stability of the locked state between the head shell 12 and the threaded post 13, making the use of the electric ratchet wrench safer. In addition, the positioning protrusion 43 can play a positioning role for the first reset member 44, reducing the possibility of the first reset member 44 disengaging from the locking member 4, so that the first reset member 44 can maintain a stable and reliable force on the locking member 4.

[0036] As Figure 2 and Figure 3As shown, in this embodiment, the locking member 4 further includes a baffle 45 and a toggle 46. Both the baffle 45 and the toggle 46 are located on the outer peripheral side of the head shell 12. The baffle 45 is provided with a perforation 451 through which the operating portion 42 passes. The baffle 45 is sleeved on the operating portion 42 and is used to cover the first through hole 122. The toggle 46 is fixedly connected to the operating portion 42 and restricts the baffle 45 from detaching from the operating portion 42. When the head shell 12 needs to be disassembled, the user pushes the toggle 46 to drive the locking member 4 to slide along the length direction of the first through hole 122, so that the bottom end of the locking member 4 disengages from the positioning groove 131, releasing the locking between the head shell 12 and the threaded post 13, enabling the head shell 12 and the threaded post 13 to rotate relative to each other. Using the baffle 45 to block the first through hole 122 can improve the integrity of the appearance of the head shell 12 and contribute to enhancing the aesthetic degree of the head shell 12. Additionally, the baffle 45 can also prevent other sundries from entering the interior of the head shell 12 through the first through hole 122, reducing the possibility of wear of the internal structure of the head shell 12 due to external sundries and contributing to increasing the service life of the internal structure of the head shell 12. Secondly, the toggle 46 restricts the baffle 45, making the connection between the baffle 45 and the locking member 4 more stable and reliable. Moreover, the toggle 46 can also increase the volume of the operating portion 42, thereby facilitating the user to operate the locking member 4 and contributing to improving the user experience.

[0037] As Figure 3 and Figure 4 shown, in this embodiment, the clutch includes a first clutch member 61 and a second clutch member 62. The first clutch member 61 is in non-rotating fit with the output shaft 21, and the second clutch member 62 is in non-rotating fit with the transmission shaft 3, that is, the first clutch member 61 rotates synchronously with the output shaft 21, and the second clutch member 62 rotates synchronously with the transmission shaft 3. The opposite ends of the first clutch member 61 and the second clutch member 62 are provided with meshing tooth portions. After the head shell 12 is threadedly connected to the threaded post 13, the first clutch member 61 and the second clutch member 62 are engaged through the tooth portions, so that the first clutch member 61 and the second clutch member 62 remain engaged, realizing the power transmission between the output shaft 21 and the transmission shaft 3. When the head shell 12 is separated from the threaded post 13, the first clutch member 61 and the second clutch member 62 can also be directly separated, thereby realizing the disassembly of the head shell 12 and avoiding the clutch members from hindering the disassembly of the head shell 12. Therefore, during the process of replacing the head shell 12, the first clutch member 61 and the second clutch member 62 can automatically achieve engagement and separation without additional operation by the user, which can greatly reduce the difficulty of replacing the head shell 12 and thus increase the replacement speed of the head shell 12.

[0038] As Figure 3 and Figure 4As shown in the figure, in this embodiment, two bearings 32 are provided on the inner wall of the head shell 12. The outer ring of the bearing 32 is fixedly connected to the inner wall of the head shell 12. The two bearings 32 are arranged at intervals along the length direction of the head shell 12. The transmission shaft 3 passes through the two bearings 32, that is, the inner ring of the bearing 32 is fixedly connected to the outer peripheral side of the transmission shaft 3. The transmission shaft 3 is rotationally connected to the head shell 12 through the bearing 32. At the same time, the bearing 32 can also play a positioning role for the transmission shaft 3, reducing the possibility of the transmission shaft 3 sliding relative to the head shell 12 in the axial direction and improving the positioning stability of the transmission shaft 3. In addition, a second convex ring 31 is provided on the outer peripheral side of the transmission shaft 3, and the second convex ring 31 is embedded between the two bearings 32, which can further reduce the possibility of the transmission shaft 3 sliding relative to the head shell 12 in the axial direction and ensure that the head shell 12 can be in transmission connection with the ratchet assembly in the head shell 12.

[0039] Of course, it can be understood that in other embodiments, the rotating shaft can also be rotationally connected to the head shell 12 only through one bearing 32.

[0040] As Figure 4 shown in the figure, in this embodiment, the cross-section of the output shaft 21 is D-shaped. A connection hole adapted to the output shaft 21 is provided at the end of the first clutch member 61 close to the output shaft 21. The output shaft 21 is inserted into the connection hole to achieve anti-rotation fit with the first clutch member 61, ensuring that the first clutch member 61 can rotate synchronously with the output shaft 21. In addition, a cross groove for inserting the second clutch member 62 is provided at the end of the transmission shaft 3 close to the second clutch member 62. The structure at the end of the second clutch member 62 is adapted to the cross groove. The second clutch member 62 can be inserted into or disengaged from the cross groove along the axial direction of the transmission shaft 3. A first convex ring 611 is provided on the outer peripheral side of the second clutch member 62, and a limiting member 64 is provided on the inner wall of the head shell 12. The limiting member 64 is a snap ring, and the limiting member 64 is in limiting fit with the second convex ring 31 to limit the second clutch member 62 from disengaging from the transmission shaft 3. It should be noted that when the second convex ring 31 abuts against the limiting member 64, there is a gap between the second clutch member 62 and the transmission shaft 3, that is, the second clutch member 62 can slide slightly between the transmission shaft 3 and the limiting member 64. A second reset member 63 is also provided in the head shell 12. The second reset member 63 is restricted between the first convex ring 611 and the inner wall of the head shell 12. The second reset member 63 acts on the first convex ring 611, so that the second reset member 63 has a tendency to slide towards the limiting member 64. Further, it can be ensured that after the head shell 12 and the accommodation bin 11 are connected, the second clutch member 62 can remain engaged with the first clutch member 61, reducing the possibility of slipping between the second clutch member 62 and the first clutch member 61 and making the power transmission more stable and reliable.

[0041] Of course, it is understandable that in other embodiments, the second clutch member 62 may also be fixedly connected to the transmission shaft 3, and the second reset member 63 may also be arranged between the first clutch member 61 and the output shaft 21. The second reset member 63 acts on the first clutch member 61 to make the first clutch member 61 have a movement tendency to maintain resistance to the second clutch member 62, and the threaded column 13 cooperates with the first clutch member 61 to limit the first clutch member 61 from disengaging from the output shaft 21.

[0042] like Figures 5 to 7 As shown, in this embodiment, the end of the head shell 12 away from the accommodating chamber 11 is provided with a ratchet assembly that is transmission-connected to the transmission shaft 3, and the ratchet assembly includes an upper ratchet member 51, a lower ratchet member 52, a pawl 53 and an elastic washer 531, wherein the upper ratchet member 51 and the lower ratchet member 52 are spliced ​​together to form a ratchet member, and the middle part of the ratchet member forms a socket 55 for installing the output head. In order to improve the connection stability between the ratchet member and the output head, a magnet 54 for adsorbing the output head is installed between the upper ratchet member 51 and the lower ratchet member 52, and the magnet 54 is annular and fixed to the inner wall of the socket 55.

[0043] The pawl 53 described in this embodiment is annular, and the pawl 53 is sleeved on the upper ratchet member 51. The pawl 53 is located between the upper ratchet member 51 and the head shell 12, and the pawl 53 and the inner wall of the shell are anti-rotationally matched through a spline. The elastic washer 531 acts on the upper surface of the pawl 53, so that the pawl 53 has a downward movement tendency to close to the upper ratchet member 51. The surface of the upper ratchet member 51 facing the pawl 53 is provided with a ratchet tooth 511 adapted to the pawl 53. The pawl 53 cooperates with the upper ratchet member 51 so that the ratchet member can only produce rotation with the head shell 12 in one direction. The lower ratchet member 52 is provided with bevel teeth 521 which are transmission-connected to the transmission shaft 3, and the transmission shaft 3 drives the lower ratchet member 52 to rotate through the bevel teeth 521. After the lower ratchet member 52 is spliced ​​with the upper ratchet member 51, the upper ratchet member 51 is driven to rotate synchronously; a second through hole for the ratchet assembly to enter and exit is provided on the lower side of the end of the head shell 12, and the head shell 12 is detachably connected with a cover plate 121 for covering the second through hole, and the cover plate 121 can be used to facilitate the user to repair and replace the ratchet assembly, which helps to improve the efficiency of repairing and replacing the ratchet assembly.

[0044] 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 including a receiving chamber in which a drive motor is installed and a head housing in which a transmission shaft is installed, characterized in that, The accommodation bin and the head shell are detachably connected. The accommodation bin is provided with a threaded post that is threadedly connected to the head shell. A locking member is provided between the threaded post and the head shell. The head shell is provided with a first through hole for the locking member to slide. At least a part of the locking member passes through the first through hole and exposes outside the head shell. The threaded post is provided with a positioning groove. The locking member slides in and out of the positioning groove along the first through hole. When the locking member enters the positioning groove, the relative rotation between the head shell and the threaded post is restricted. A clutch is provided between the output shaft of the driving motor and the transmission shaft. The output shaft and the transmission shaft are drivingly connected through the clutch. The clutch can be separated in the axial direction to block power transmission.

2. The electric ratchet wrench according to claim 1, characterized in that, The locking member further includes a limiting plate. The limiting plate forms a limiting fit with the bottom wall around the first through hole to limit the limiting plate from passing through the first through hole.

3. The electric ratchet wrench according to claim 1, wherein The length direction of the first through hole is parallel to the axial direction of the head shell. The notch of the positioning groove is distributed at the end of the threaded post. A first reset member is provided in the first through hole. The first reset member acts on the locking member to make the locking member have a tendency to slide towards the positioning groove.

4. An electric ratchet wrench according to claim 3, characterized in that, The locking member is provided with a positioning protrusion. One end of the first reset member abuts against the inner wall of the first through hole, and the other end is positioned at the positioning protrusion.

5. An electric ratchet wrench according to claim 1, wherein, The locking member further includes a baffle plate and a turning knob. The operating member of the locking member passes through the first through hole and exposes outside the head shell. The baffle plate is provided with a through hole for the operating part to pass through. The baffle plate is sleeved on the operating part and is used to cover the first through hole. The turning knob is fixedly connected to the operating part and restricts the baffle plate from detaching from the operating part.

6. An electric ratchet wrench according to claim 1, characterized in that, The clutch includes a first clutch member and a second clutch member that are respectively in non-rotating fit with the output shaft and the transmission shaft. The opposite ends of the first clutch member and the second clutch member are provided with meshing tooth parts.

7. The electric ratchet wrench according to claim 6, wherein, The first clutch member is fixedly connected to the output shaft. The second clutch member is slidably connected to the transmission shaft. A second reset member is provided in the head shell to make the second clutch member have a tendency to keep abutting against the first clutch member. A first convex ring is provided on the outer peripheral side of the second clutch member. A limiting member is provided on the inner wall of the head shell. The limiting member and the second convex ring are in limiting fit to prevent the second clutch member from detaching from the transmission shaft.

8. An electric ratchet wrench according to claim 6, wherein, The second clutch member is fixedly connected to the transmission shaft. A second reset member is provided between the first clutch member and the output shaft to make the first clutch member have a tendency to keep abutting against the second clutch member. The threaded post and the first clutch member are in limiting fit to prevent the first clutch member from detaching from the output shaft.

9. An electric ratchet wrench according to claim 1, characterized in that, Two bearings are installed at intervals along the axial direction on the inner wall of the head shell. The transmission shaft is rotationally fitted with the head shell through the bearings. A second convex ring is provided on the outer peripheral side of the transmission shaft. The second convex ring is embedded between the two bearings.

10. An electric ratchet wrench according to claim 1, characterized in that, A ratchet assembly is provided at the end of the head shell away from the accommodation bin. The ratchet assembly is drivingly connected to the transmission shaft. The head shell is provided with a second through hole for the ratchet assembly to enter and exit. The head shell is detachably connected with a cover plate for covering the second through hole.

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