An electric power wrench

Abstract

This utility model discloses an electric wrench. The front side of its front housing has a first insertion port and a clearance hole. One of the open-toothed rings and the front housing has a rotating groove, and the other has a rotating block. The rotating block rotatably positions itself in the rotating groove, causing the open-toothed ring to rotatably position itself on the front housing. The open-toothed ring has a second insertion port communicating with its inner hole. The clearance hole and the inner hole are arranged opposite each other. The inner hole wall has a clamping assembly. At least two output gears are rotatably mounted on the front housing. The teeth on the outer periphery of the open-toothed ring mesh with at least one output gear. The rotation axis of the open-toothed ring is located in front of the rotation axis of the output gear. A drive module is located on the front housing and connected to the output gears. This structure significantly reduces or avoids wear and enlargement of the clearance hole, and also significantly reduces or avoids deformation and damage to the front side of the front housing due to concentrated force.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an electric wrench. Background Technology

[0002] A rebar sleeve is a component used to connect rebars. It can replace traditional methods such as tying and welding to achieve more efficient and reliable butt connections of rebars in construction projects. In existing technology, the installation of rebar sleeves is done manually by workers by tightening them. To significantly reduce the labor intensity of workers installing rebar sleeves, the inventor designed and manufactured an electric wrench. However, through further production research, the inventor discovered that because the open toothed ring 200 is rotatably located inside the clearance hole S2 on the front side of the front housing 100 (refer to...),... Figure 6 As shown, during the process of the output gear 310 driving the open gear ring 200 to rotate, the first component force F1 of the output gear 310 on the open gear ring 200 will cause the open gear ring 200 to press against the wall of the clearance hole S2, which can easily lead to wear and enlargement of the clearance hole S2, as well as damage to the front side of the front end shell 100 due to concentrated force deformation. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an electric wrench.

[0004] An electric wrench according to an embodiment of the present invention includes a front end shell, an open toothed ring, an output gear, and a drive module. The front end shell has a first insertion port and a clearance hole communicating with each other on its front side. One of the open toothed ring and the front end shell has a rotating groove, and the other has a rotating block. The rotating block is rotatably disposed in the rotating groove so that the open toothed ring is rotatably disposed in the front end shell. The open toothed ring has a second insertion port communicating with its inner hole. The clearance hole and the inner hole are arranged opposite to each other. The inner hole has a clamping assembly on its wall. The output gear is rotatably disposed in the front end shell. There are at least two output gears. The teeth on the outer periphery of the open toothed ring mesh with at least one of the output gears. The rotation axis of the open toothed ring is located in front of the rotation axis of the output gear. The drive module is disposed in the front end shell and connected to the output gear. The drive module can drive the output gear to rotate, thereby causing the open toothed ring to rotate clockwise, so as to drive the workpiece held by the clamping assembly and placed in the inner hole and the clearance hole through the opposite first insertion port and second insertion port to rotate.

[0005] An electric wrench according to an embodiment of the present invention has at least the following features:

[0006] Beneficial effects:

[0007] With the above structure, the rotating block is rotatably mounted in the rotating groove, causing the open toothed ring to rotatably mount on the front end housing. The rotation axis of the open toothed ring is located in front of the rotation axis of the output gear. Therefore, during the process of the output gear driving the open toothed ring to rotate, the first component force of the output gear on the open toothed ring will cause the open toothed ring to press against the groove wall of the rotating groove through the rotating block, rather than the wall of the clearance hole. Thus, wear and enlargement of the clearance hole can be greatly reduced or avoided. Moreover, since the rotation axis of the open toothed ring is located in front of the rotation axis of the output gear, the part of the open toothed ring that presses against the groove wall of the rotating groove through the rotating block under the first component force is located on the middle or rear middle side of the front end housing. In other words, compared with the previously designed electric wrench, this application changes the force application position of the open toothed ring on the front end housing from the front side to the middle or rear middle side, which can greatly reduce or avoid deformation and damage to the front side of the front end housing due to force concentration. The front side of the front shell with the clearance hole has lower strength than the middle and rear sides. Therefore, changing the force application position from the front side to the middle or middle-rear side can greatly extend the service life of the front shell.

[0008] According to some embodiments of the present invention, the front end shell includes a connected top plate and a bottom plate. The front sides of the top plate and the bottom plate are provided with a communicating first insertion port and a clearance hole. The open toothed ring and the output gear are both disposed between the top plate and the bottom plate. At least one of the top plate and the bottom plate is provided with the rotating groove and the rotating block, which are separate from the open toothed ring. The rear sides of the top plate and the bottom plate are both connected to the drive module.

[0009] According to some embodiments of this utility model, both the top plate and the bottom plate are made of steel plate.

[0010] According to some embodiments of the present invention, two baffles are provided between the top plate and the bottom plate, and the two baffles are respectively located on the left and right sides of the open gear ring and on the left and right sides of the output gear.

[0011] According to some embodiments of this utility model, the rear sides of both the top plate and the bottom plate are detachably connected to the drive module.

[0012] According to some embodiments of the present invention, the drive module is provided with a connecting block, and the connecting block, the rear side of the top plate and the rear side of the bottom plate are respectively provided with a first hole, a second hole and a third hole, and a bolt and nut assembly is inserted through the first hole, the second hole and the third hole.

[0013] According to some embodiments of the present invention, the connecting block is provided with a slot communicating with the first hole, and the rear side of the top plate and / or the rear side of the bottom plate is provided with a plug-in part, the plug-in part is provided with a corresponding second hole or the third hole, and the plug-in part is inserted into the slot.

[0014] According to some embodiments of the present invention, a positioning component is provided between the front end shell and the clamping component, wherein the driving module can drive the output gear to rotate and drive the open toothed ring to reverse, so that the positioning component positions the open toothed ring, so that the first placement port and the second placement port are arranged opposite to each other for the workpiece to be placed.

[0015] According to some embodiments of this utility model, the positioning component includes an abutment block, a movable paddle block, a fixed paddle block, and an elastic element. The abutment block and the fixed paddle block are respectively fixed to the front end shell and the clamping component. The movable paddle block is rotatably disposed on the front end shell. The elastic element connects the movable paddle block and the abutment block, or connects the movable paddle block and the front end shell. The elastic element can drive the movable paddle block to rotate to abut against the abutment block. When the driving module drives the open toothed ring to rotate clockwise, the fixed paddle block can push the movable paddle block to rotate and release it from abutment against the abutment block, and can also push the movable paddle block to rotate and avoid the fixed paddle block so that it can move through. When the driving module drives the open toothed ring to rotate counterclockwise, the movable paddle block abutting against the abutment block can abut against the fixed paddle block to block its rotation through, so as to position the open toothed ring.

[0016] According to some embodiments of the present invention, the contact point between the movable lever and the fixed lever is located outside the top view projection of the inner hole. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural diagram of an embodiment of the electric wrench of this utility model;

[0019] Figure 2 for Figure 1 A partial exploded view of the electric wrench shown;

[0020] Figure 3 for Figure 1 The diagram shows a partial exploded view of the electric wrench after some parts have been removed.

[0021] Figure 4 for Figure 1 The diagram shows the structure of the electric wrench after some parts have been removed.

[0022] Figure 5 for Figure 1 Another exploded view of the electric wrench shown after some parts have been removed;

[0023] Figure 6A partial exploded view of an existing electric wrench designed and manufactured for the inventor.

[0024] Figure label:

[0025] Front end shell 100, top plate 110, second hole 111, bottom plate 120, third hole 121, plug-in part 122;

[0026] Open toothed ring 200, rotating block 210, inner hole 220, second inlet 230, toothed part 240;

[0027] Output gear 310, transmission gear 320, input gear 321;

[0028] Drive module 400, drive gear 410, connecting block 420, first hole 421, slot 422;

[0029] Clamping assembly 500;

[0030] 600 hoarding panels;

[0031] Positioning component 700, abutment block 710, movable lever block 720, fixed lever block 730, elastic element 740;

[0032] Bolt and nut assembly 800;

[0033] First inlet S1, clearance hole S2, rotating groove S3. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In the description of this utility model, the use of terms such as first, second, third, fourth, and fifth is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 5 This utility model provides an electric wrench, which includes a front end housing 100, an open gear ring 200, an output gear 310, and a drive module 400.

[0039] The front end housing 100 has a first inlet S1 and a clearance hole S2 connected on its front side. The front end housing 100 has a rotating groove S3. The open toothed ring 200 has a rotating block 210. The rotating block 210 is rotatably disposed in the rotating groove S3 so that the open toothed ring 200 is rotatably disposed on the front end housing 100. The open toothed ring 200 has a second inlet 230 connected to its inner hole 220. The clearance hole S2 and the inner hole 220 are arranged opposite to each other. The hole wall of the inner hole 220 is provided with a clamping assembly 500. The output gear 310 is rotatably disposed on the front end housing 100. There are two output gears 310. The teeth 240 on the outer periphery of the open toothed ring 200 mesh with at least one output gear 310. The rotation axis of the open toothed ring 200 is located in front of the rotation axis of the output gear 310. The drive module 400 is disposed on the rear side of the front end housing 100 and is connected to the output gear 310. The drive module 400 can drive the output gear 310 to rotate, thereby causing the open gear ring 200 to rotate in the forward direction, so as to drive the workpiece held by the clamping assembly 500, which is placed in the inner hole 220 and the clearance hole S2 through the relative first insertion port S1 and the second insertion port 230, to rotate.

[0040] Understandably, referring to Figure 1 When the second inlet 230 is rotated to be positioned opposite the first inlet S1, the workpiece can be moved through the first inlet S1 and the second inlet 230 and placed in the inner hole 220 and the clearance hole S2.

[0041] It is understood that, in this embodiment, reference is made to... Figure 3 The clearance hole S2, the open toothed ring 200, the rotating block 210, and the rotating groove S3 are all C-shaped structures.

[0042] It is understood that in this embodiment, the clamping component 500 adopts an existing fixed claw and movable claw structure (such as CN118061119B - a clamping claw structure for an electric wrench), and therefore will not be described further here. The workpiece for which this electric wrench is applicable is a rebar sleeve. Of course, in some embodiments, the manufacturer can design and replace different clamping components 500 to drive different workpieces (such as turnbuckles) to rotate.

[0043] With the above structure, the rotating block 210 is rotatably disposed in the rotating groove S3 so that the open toothed ring 200 is rotatably disposed in the front end shell 100. The rotation axis of the open toothed ring 200 is located in front of the rotation axis of the output gear 310. Therefore, during the process of the output gear 310 driving the open toothed ring 200 to rotate, the first component force F1 of the output gear 310 on the open toothed ring 200 will cause the open toothed ring 200 to press against the groove wall of the rotating groove S3 through the rotating block 210 instead of the hole wall of the clearance hole S2. Therefore, the wear and enlargement of the clearance hole S2 can be greatly reduced or avoided. Furthermore, since the rotation axis of the open toothed ring 200 is located in front of the rotation axis of the output gear, the portion of the open toothed ring 200 that is subjected to the first component force F1 and presses against the groove wall of the rotating groove S3 through the rotating block 210 is located on the middle or rear side of the front end housing 100. In other words, compared with the previously designed electric wrench, this application changes the force application position of the open toothed ring 200 on the front end housing 100 from the front side to the middle or rear side, which can greatly reduce or avoid the situation where the front side of the front end housing 100 is deformed and damaged due to force concentration. Among them, the front side of the front end housing 100 with the clearance hole S2 has lower strength than the middle and rear sides. Therefore, changing the force application position from the front side to the middle or rear side can also greatly extend the service life of the front end housing 100.

[0044] In this embodiment, the drive module 400 is connected to the output gear 310. Specifically, refer to... Figure 2 and Figure 3 Multiple transmission gears 320 are rotatably provided on the front housing 100. Among the multiple transmission gears 320, there is an input gear 321. The drive module 400 is a motor module. The drive gear 410 on the drive module 400 meshes with the input gear 321, and the corresponding transmission gear 320 meshes with the output gear 310.

[0045] In this embodiment, refer to Figure 2 and Figure 3The front end housing 100 includes a top plate 110 and a bottom plate 120 connected together. The front sides of the top plate 110 and the bottom plate 120 are provided with the aforementioned first insertion inlet S1 and the aforementioned clearance hole S2. The open toothed ring 200 and the output gear 310 are both located between the top plate 110 and the bottom plate 120. The top plate 110 and the bottom plate 120 are both provided with the aforementioned rotating groove S3. The upper and lower sides of the open toothed ring 200 are each provided with a rotating block 210. The two rotating blocks 210 are rotatably located in the two rotating grooves S3 in a one-to-one correspondence. The rear sides of the top plate 110 and the bottom plate 120 are both connected to the drive module 400.

[0046] It is understandable that the clearance hole S2 and the inner hole 220 are arranged opposite to each other, and the clearance hole S2 of the top plate 110, the inner hole 220 and the clearance hole of the bottom plate 120 are arranged opposite to each other from top to bottom.

[0047] In some embodiments, both the top plate 110 and the bottom plate 120 are provided with a rotating block 210, and the upper and lower sides of the open toothed ring 200 are provided with a rotating groove S3, and the two rotating blocks 210 are rotatably disposed in the two rotating grooves S3 in a one-to-one correspondence.

[0048] In some embodiments, the top plate 110 is provided with a rotating block 210, the bottom plate 120 is provided with a rotating groove S3, the upper side of the open toothed ring 200 is provided with a rotating groove S3, and the lower side is provided with a rotating block 210. The two rotating blocks 210 are rotatably disposed in the two rotating grooves S3 in a one-to-one correspondence.

[0049] In some embodiments, only the top plate 110 is provided with a rotating block 210, and only the upper side of the open toothed ring 200 is provided with a rotating groove S3, and the rotating block 210 is rotatably disposed in the rotating groove S3.

[0050] In some embodiments, only the bottom plate 120 is provided with a rotating groove S3, and only the lower side of the open toothed ring 200 is provided with a rotating block 210, which is rotatably disposed in the rotating groove S3.

[0051] In this embodiment, both the top plate 110 and the bottom plate 120 are made of steel plates.

[0052] Understandably, the previously designed electric wrench used an aluminum shell for its front end housing 100. However, an aluminum shell 100 requires a larger size to achieve higher strength. This larger size causes inconvenience when installing workpieces, and the mold costs for producing a larger front end housing 100 are also high. Therefore, this application uses steel plates for both the top plate 110 and the bottom plate 120 of the front end housing 100. This leverages the advantages of steel plates—small size and high strength—to make the overall front end housing 100 more compact. Furthermore, the cost of producing steel plates by cutting is far lower than the cost of producing aluminum shells by molding.

[0053] In this embodiment, refer to Figure 2 and Figure 3 Two baffle plates 600 are provided between the top plate 110 and the bottom plate 120. The two baffle plates 600 are respectively located on the left and right sides of the open gear ring 200 and on the left and right sides of the output gear 310.

[0054] With the above structure, the two baffles 600 can, on the one hand, prevent external debris from entering between the top plate 110 and the bottom plate 120 from the left or right side, thus providing some protection for the output gear 310 and the open gear ring 200; on the other hand, they can cover the output gear 310 and the open gear ring 200, thereby improving the overall aesthetic appearance of the electric wrench.

[0055] In this embodiment, the rear sides of both the top plate 110 and the bottom plate 120 are detachably connected to the drive module 400. Specifically, refer to... Figure 2 and Figure 3 The drive module 400 is provided with a connecting block 420, which has a first hole 421 and a slot 422 communicating with the first hole 421. The rear side of the top plate 110 is provided with a second hole 111, and the rear side of the bottom plate 120 is provided with a plug-in part 122, which has a third hole 121. The rear side of the top plate 110 abuts against the top side of the connecting block 420, and the plug-in part 122 is inserted into the slot 422. A bolt and nut assembly 800 passes through the first hole 421, the second hole 111, and the third hole 121.

[0056] It is understandable that when the plug part 122 is inserted into the slot 422, the third hole 121 is positioned opposite to the first hole 421 so that the bolt and nut assembly 800 can pass through, and the input gear 321 meshes with the drive gear 410.

[0057] With the above structure, the front shell 100 and the drive module 400 can be detached, so as to reduce the space occupied during transportation and reduce the cost of transportation packaging.

[0058] In some embodiments, the connecting block 420 has a first hole 421 and a slot 422 communicating with the first hole 421. The rear side of the top plate 110 has a plug-in portion 122 with a second hole 111. The rear side of the bottom plate 120 has a third hole 121. The rear side of the bottom plate 120 abuts against the bottom side of the connecting block 420. The plug-in portion 122 is inserted into the slot 422. A bolt and nut assembly 800 passes through the first hole 421, the second hole 111, and the third hole 121. When the plug-in portion 122 is inserted into the slot 422, the second hole 111 is positioned opposite to the first hole 421 to facilitate the insertion of the bolt and nut assembly 800.

[0059] In some embodiments, the connecting block 420 is provided with a first hole 421 and a slot 422 communicating with the first hole 421. Both the rear side of the top plate 110 and the rear side of the bottom plate 120 are provided with insertion portions 122. The insertion portion 122 on the rear side of the top plate 110 is provided with a second hole 111, and the insertion portion 122 on the rear side of the bottom plate 120 is provided with a third hole 121. The insertion portions 122 are inserted into the slots 422 in a corresponding manner. A bolt and nut assembly 800 passes through the first hole 421, the second hole 111, and the third hole 121. When the insertion portions 122 are inserted into the slots 422 in a corresponding manner, the second hole 111 and the third hole 121 are positioned opposite to the first hole 421 to facilitate the insertion of the bolt and nut assembly 800.

[0060] To facilitate the reset of the electric wrench, the first input port S1 and the second input port 230 are positioned opposite each other, refer to Figure 4 and Figure 5 A positioning component 700 is provided between the base plate 120 and the clamping component 500. The drive module 400 can drive the output gear 310 to rotate and drive the open gear ring 200 to reverse, so that the positioning component 700 positions the open gear ring 200, so that the first placement port S1 and the second placement port 230 are arranged opposite to each other for the workpiece to be placed.

[0061] It is understandable that the electric wrench reset causes the first inlet S1 and the second inlet 230 to be positioned opposite each other, that is, the electric wrench reset causes the first inlet S1 of the top plate 110, the second inlet 230 and the first inlet S1 of the bottom plate 120 to be positioned opposite each other from top to bottom.

[0062] The positioning component 700 includes an abutment block 710, a movable paddle block 720, a fixed paddle block 730, and an elastic element 740.

[0063] Reference Figure 4 and Figure 5 The abutment block 710 and the fixed lever block 730 are respectively fixed to the base plate 120 and the clamping assembly 500. The movable lever block 720 is rotatably mounted on the base plate 120. The elastic element 740 connects the movable lever block 720 and the abutment block 710. The elastic element 740 can drive the movable lever block 720 to rotate to abut against the abutment block 710. The elastic element 740 is a torsion spring.

[0064] When the drive module 400 drives the open gear ring 200 to rotate forward, the fixed lever 730 can push the movable lever 720 to rotate and release it from contact with the abutment block 710, and can also push the movable lever 720 to rotate and avoid the fixed lever 730 so that it can move through.

[0065] When the drive module 400 drives the open toothed ring 200 to reverse, the movable paddle 720, which abuts against the abutting block 710, can abut against the fixed paddle 730 to block its rotation, thereby positioning the open toothed ring 200 and causing the second placement inlet 230 to rotate to be positioned opposite to the first placement inlet S1 for the workpiece to be placed.

[0066] With the above structure, the positioning component 700 of this application contains fewer parts and has a simple and ingenious structure. In other words, this application can realize the reset work of the electric wrench by using the positioning component 700, which has a low design and production cost.

[0067] In some embodiments, the elastic element 740 connects the movable lever 720 and the base plate 120.

[0068] In some embodiments, the abutment block 710 and the fixed lever block 730 are respectively fixed to the top plate 120 and the clamping assembly 500, the movable lever block 720 is rotatably disposed on the top plate 120, and the elastic member 740 connects the movable lever block 720 and the abutment block 710. The elastic member 740 can drive the movable lever block 720 to rotate to abut against the abutment block 710. The elastic member 740 is configured as a torsion spring.

[0069] In this embodiment, refer to Figure 4 The contact points of the movable lever 720 and the fixed lever 730 are located outside the top view projection of the inner hole 220, which can greatly reduce or avoid interference of the contact points on the workpiece placed in the inner hole 220, and can greatly reduce the probability of the contact points colliding with objects.

[0070] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A power wrench characterized by: include The front end housing (100) has a first insertion port (S1) and a clearance hole (S2) connected on the front side; An open toothed ring (200) and the front end shell (100) are provided with a rotating groove (S3) on one side and a rotating block (210) on the other side. The rotating block (210) is rotatably disposed in the rotating groove (S3) so that the open toothed ring (200) is rotatably disposed in the front end shell (100). The open toothed ring (200) has a second insertion port (230) communicating with its inner hole (220). The clearance hole (S2) and the inner hole (220) are arranged opposite to each other. The hole wall of the inner hole (220) is provided with a clamping assembly (500). An output gear (310) is rotatably disposed on the front end housing (100). At least two output gears (310) are provided. The teeth (240) on the outer peripheral side of the open toothed ring (200) mesh with at least one of the output gears (310). The rotation axis of the open toothed ring (200) is located in front of the rotation axis of the output gear (310). A drive module (400) is disposed on the front end housing (100), and the drive module (400) is connected to the output gear (310), wherein, The drive module (400) can drive the output gear (310) to rotate, thereby causing the open gear ring (200) to rotate in the forward direction, so as to drive the workpiece held by the clamping assembly (500) to rotate through the opposite first insertion port (S1) and second insertion port (230) placed in the inner hole (220) and the clearance hole (S2).

2. The electric wrench according to claim 1, characterized in that: The front end housing (100) includes a top plate (110) and a bottom plate (120) connected together. The front sides of the top plate (110) and the bottom plate (120) are provided with the first insertion port (S1) and the clearance hole (S2) that are connected. The open toothed ring (200) and the output gear (310) are both provided between the top plate (110) and the bottom plate (120). At least one of the top plate (110) and the bottom plate (120) is provided with the rotating groove (S3) and the rotating block (210) respectively with the open toothed ring (200). The rear sides of the top plate (110) and the bottom plate (120) are both connected to the drive module (400).

3. An electric wrench according to claim 2, characterized in that: Both the top plate (110) and the bottom plate (120) are made of steel plate.

4. An electric wrench according to claim 2, characterized in that: Two baffles (600) are provided between the top plate (110) and the bottom plate (120). The two baffles (600) are respectively located on the left and right sides of the open gear ring (200) and on the left and right sides of the output gear (310).

5. An electric wrench according to claim 2, characterized in that: The rear sides of both the top plate (110) and the bottom plate (120) are detachably connected to the drive module (400).

6. An electric wrench according to claim 4, characterized in that: The drive module (400) is provided with a connecting block (420). The connecting block (420), the rear side of the top plate (110) and the rear side of the bottom plate (120) are respectively provided with a first hole (421), a second hole (111) and a third hole (121). A bolt and nut assembly (800) passes through the first hole (421), the second hole (111) and the third hole (121).

7. An electric wrench according to claim 6, characterized in that: The connecting block (420) is provided with a slot (422) communicating with the first hole (421). The rear side of the top plate (110) and / or the rear side of the bottom plate (120) are provided with a plug-in part (122). The plug-in part (122) is provided with a corresponding second hole (111) or the third hole (121). The plug-in part (122) is inserted into the slot (422).

8. An electric wrench according to claim 1, characterized in that: A positioning component (700) is provided between the front end shell (100) and the clamping assembly (500), wherein, The drive module (400) can drive the output gear (310) to rotate and cause the open gear ring (200) to reverse, so that the positioning component (700) positions the open gear ring (200) so that the first placement port (S1) and the second placement port (230) are arranged opposite to each other for the workpiece to be placed.

9. An electric wrench according to claim 8, characterized in that: The positioning component (700) includes an abutment block (710), a movable lever block (720), a fixed lever block (730), and an elastic element (740). The abutment block (710) and the fixed lever block (730) are respectively fixed to the front end shell (100) and the clamping component (500). The movable lever block (720) is rotatably disposed on the front end shell (100). The elastic element (740) connects the movable lever block (720) and the abutment block (710), or connects the movable lever block (720) and the front end shell (100). The elastic element (740) can drive the movable lever block (720) to rotate to abut against the abutment block (710). When the drive module (400) drives the open gear ring (200) to rotate clockwise, the fixed lever (730) can push the movable lever (720) to rotate and release it from contact with the abutment block (710), and can also push the movable lever (720) to rotate and avoid the fixed lever (730) so that it can move through. When the drive module (400) drives the open toothed ring (200) to reverse, the movable paddle (720) that abuts against the abutting block (710) can abut against the fixed paddle (730) to block its rotation and thus position the open toothed ring (200).

10. An electric wrench according to claim 9, characterized in that: The abutment of the movable dial (720) and the fixed dial (730) is located outside the top view projection of the inner hole (220).

Images