A double charging mode explosion-proof electric torque wrench
Patent Information
- Application Number
- CN202522108640.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0003]针对现有技术中存在的不足，本实用新型的目的在于提供一种双充电模式的隔爆电动扭矩扳手，具有快充和慢充两种充电模式，充电效率高，大电流快充时充电接口位置产热和损耗少，散热好，本实用新型可有效解决传统电动扭矩扳手充电效率低、无法快充以及充电口容易过热的技术问题
本实用新型提供的双充电模式的隔爆电动扭矩扳手，具有快充和慢充两种充电模式，可通过充电插口插接外部充电器，控制器板识别电压或电阻信号启用慢充模式后通过DC母座连接电池包以小电流进行缓慢充电；也可连接大电流通过控制器板识别启用快充模式，通过刀片公插与刀片母插连接电池包进行快速充电。本实用新型的隔爆电动扭矩扳手充电效率高，充电方式多样灵活，可以满足不同的充电使用需求，在大电流快充时充电接口位置产热和损耗少，散热好，充电安全性能高。
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Figure CN224765303U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power tool technology, and in particular to an explosion-proof electric torque wrench with dual charging modes. Background Technology
[0002] Electric torque wrenches are power tools that use a motor to tighten or loosen high-strength bolts and nuts. In flammable and explosive environments such as coal mines, oil fields, chemical plants, and natural gas processing plants, the safety and reliability of equipment are of paramount importance. Conventional power tools often generate sparks during use due to friction or impact, or short circuits caused by high temperatures in the internal motor and battery, easily leading to fires or even explosions, posing significant safety hazards to personnel and production facilities. Currently, most explosion-proof electric torque wrenches have their batteries encapsulated inside the wrench. During charging, they can only be slowly charged by plugging a charger into a DC connector. When fast charging with high current, the small contact points of the DC female connector and internal spring contacts result in low contact area and high resistance, making it unable to safely withstand the large current required for fast charging. Furthermore, the charging process can easily cause localized high temperatures and slow heat dissipation, posing a significant safety hazard. Therefore, there is an urgent need to develop an explosion-proof power tool with multiple charging modes and the ability to achieve fast and safe charging. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide an explosion-proof electric torque wrench with dual charging modes, featuring both fast and slow charging. It boasts high charging efficiency, minimal heat generation and loss at the charging port during high-current fast charging, and excellent heat dissipation. This invention effectively solves the technical problems of low charging efficiency, inability to fast charge, and overheating of the charging port in traditional electric torque wrenches.
[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: One technical solution of this utility model provides an explosion-proof electric torque wrench with dual charging modes, including an outer shell and a hollow explosion-proof inner shell fixed inside the outer shell. The bottom of the explosion-proof inner shell is provided with a battery compartment, and a battery mechanism is installed in the battery compartment. The battery mechanism includes a battery pack and a controller board. The controller board is fixed to the top of the battery compartment by a controller fixing plate. The battery pack is inserted inside the battery compartment and located below the controller fixing plate. The bottom opening of the battery compartment is covered with an explosion-proof bottom plate. The battery compartment has a charging port on its side, and a DC female connector is provided inside the charging port. The DC female connector is electrically connected to the battery pack and the controller board. A pin socket is fixed in the controller mounting plate, and two blade male connectors are inserted into the pin socket. The battery pack has a blade female connector, and the blade male connectors are electrically connected to the battery pack and the controller board by being inserted into the blade female connectors.
[0005] Because the contact points in the DC female connector are relatively small, with a small contact area and high resistance, they cannot safely withstand the large current required for fast charging. Therefore, the explosion-proof electric torque wrench designed in the above scheme has two charging modes: slow charging and fast charging. When the electric torque wrench is not urgently needed, slow charging is performed by plugging an external charger into the charging port. The controller board identifies the voltage or resistance signal and activates slow charging mode, connecting the battery pack through the DC female connector for slow charging with a small current. When fast charging is urgently needed, after plugging an external charger into the charging port, the controller board identifies and activates fast charging mode, connecting the battery pack through the blade male and female connectors to transmit a large current for rapid charging. In the above scheme, by setting up the blade male and female connectors for electrical connection, the blade interface has a large contact area and extremely low contact resistance, enabling it to withstand higher currents, increasing the current conduction area, and resulting in high charging efficiency. Electrical energy can be efficiently and directly delivered to the battery pack, while reducing heat generation and loss during charging, providing good heat dissipation, and avoiding high temperatures during charging.
[0006] In some possible implementations, the battery compartment has an unlocking hole on its side, through which a battery unlocking button is inserted. A latch connects the battery compartment and the battery pack, with the middle of the latch pivotally connected to the inner wall of the battery compartment. One end of the latch has an opening slot, and the end of the battery unlocking button is vertically embedded in the opening slot. A first spring abuts between the battery unlocking button and the opening slot. The other end of the latch has a protruding locking block, and the side of the battery pack has a locking groove. The locking block and the locking groove are positioned correspondingly. When the battery pack is installed in the battery compartment, the locking block is engaged in the locking groove. When the battery pack needs to be removed, pressing the battery unlocking button pushes one end of the latch's opening slot inward, disengaging the locking block from the locking groove through the pivotal connection between the latch and the battery compartment, thus removing the battery pack from the battery compartment. When installing the battery pack, simply push the battery pack into the battery compartment, sliding it along the wedge-shaped surface of the locking block until the locking block is finally engaged in the locking groove, fixing the battery pack in position and preventing it from loosening.
[0007] In some possible implementations, the battery pack is provided with an external charging port for connecting to an external power source to charge the battery pack. The electric torque wrench of this invention allows the battery pack to be removed for individual charging via the external charging port, or it can be inserted into the battery compartment for online charging via the charging port.
[0008] In some possible implementations, a handle groove is provided on the surface of the battery pack adjacent to the explosion-proof base plate, and a handle ring is hinged in the handle groove. The battery pack can be removed from the battery compartment by rotating the handle ring, and the handle ring can also be stored in the handle groove, saving internal space of the battery compartment when the explosion-proof base plate covers the bottom opening of the battery compartment.
[0009] In some possible implementations, a button plate is fixed to the controller mounting plate and electrically connected to the controller board. A gear adjustment hole is provided on the side of the battery compartment, corresponding to the position of the button plate. A gear adjustment button passes through the gear adjustment hole, with one end extending out of the battery compartment and the other end connectable to the button plate. A second spring abuts against the gear adjustment button and the gear adjustment hole. Pressing the gear adjustment button adjusts the output torque, limiting the maximum output torque for each gear.
[0010] In some possible implementations, the charging port is covered with a threaded cap, which is threadedly connected to the charging port to protect the charging port and provide waterproof, moisture-proof and dustproof effects.
[0011] In some possible implementations, a motor assembly electrically connected to the battery mechanism is fixed in the upper inner cavity of the explosion-proof inner shell. The output end of the motor assembly is sequentially connected to a gearbox and a torque transmission mechanism. A head shell is fitted over the gearbox and torque transmission mechanism. The rear end of the head shell is fixedly connected to the explosion-proof inner shell. An explosion-proof rear cover is provided at the rear end of the explosion-proof inner shell. A cooling fan is provided between the outer shell and the explosion-proof rear cover for cooling purposes.
[0012] This utility model's electric torque wrench features an explosion-proof inner shell, isolating electrical components prone to short-circuit sparks or explosions from the external mine environment, achieving its own explosion-proof effect and preventing dangerous situations such as fires and explosions caused by circuit failures or explosions within the mine. During operation, it is powered by a battery mechanism, and the motor assembly drives the reduction gearbox, which in turn drives the torque transmission mechanism. This multiplies the motor's torque output to the power output shaft of the torque transmission mechanism, thereby increasing the wrench's working torque to complete the installation and removal of high-torque bolts or nuts.
[0013] In some possible implementations, a speed regulating mechanism is installed in the central cavity of the explosion-proof inner shell. The speed regulating mechanism includes a connected signal switch and a speed regulating button. The signal switch is fixedly connected to the explosion-proof inner shell through a fixing bracket. A T-shaped threaded ring is provided in the outer shell and the explosion-proof inner shell, and the speed regulating button is movably connected in the T-shaped threaded ring.
[0014] This utility model has the following beneficial effects: This invention provides an explosion-proof electric torque wrench with dual charging modes, featuring both fast and slow charging. It can connect to an external charger via the charging port. The controller board recognizes the voltage or resistance signal and activates the slow charging mode, then connects to the battery pack via the DC female connector for slow charging with a small current. Alternatively, it can connect to a high-current charger, which, upon recognition by the controller board, activates the fast charging mode. The battery pack is then quickly charged via the male and female blade connectors. This explosion-proof electric torque wrench boasts high charging efficiency and diverse, flexible charging methods to meet various charging needs. During high-current fast charging, it exhibits low heat generation and loss at the charging interface, excellent heat dissipation, and high charging safety. Attached Figure Description
[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of a dual-charging mode explosion-proof electric torque wrench with a circular base. Figure 2 yes Figure 1 Rear view of an explosion-proof electric torque wrench with dual charging modes; Figure 3 yes Figure 2 Cross-sectional view of the internal structure along line "AA" in the middle; Figure 4 yes Figure 1 Exploded structure diagram of an explosion-proof electric torque wrench with dual charging modes; Figure 5 yes Figure 2 Cross-sectional view along line "BB" in the middle; Figure 6 yes Figure 2 Cross-sectional view along the "CC" line; Figure 7 yes Figure 2 Cross-sectional view along the "DD" line; Figure 8 This is a schematic diagram showing the connection between the battery unlock button and the latch in an explosion-proof electric torque wrench; Figure 9 This is a three-dimensional structural diagram of a square-bottomed, dual-charging-mode explosion-proof electric torque wrench. Figure 10 This is a schematic diagram showing the connection between the battery pack, battery unlocking button, and latch in an explosion-proof electric torque wrench. Figure 11 This is a schematic diagram showing the positions of the handle groove and handle ring in the battery pack.
[0016] Explanation of the labels in the diagram: 1. Outer shell; 2. Explosion-proof inner shell; 21. Battery compartment; 211. Charging port; 212. Unlocking hole; 213. Gear adjustment hole; 214. Gear adjustment button; 215. Button panel; 216. Second spring; 217. Threaded cover; 22. Explosion-proof base plate; 23. Speed control mechanism; 231. Signal switch; 232. Speed control button; 233. Fixing bracket; 234. T-shaped threaded ring; 3. Battery mechanism; 31. Battery pack; 311. Slot; 31 2. External charging port; 313. Handle slot; 314. Handle ring; 32. Controller board; 33. Controller mounting plate; 34. DC female connector; 35. Pin socket; 36. Blade male connector; 37. Blade female connector; 38. Battery unlock button; 39. Lock; 391. Opening slot; 392. Locking block; 393. First spring; 4. Motor assembly; 5. Gearbox; 6. Torque transmission mechanism; 7. Head housing; 8. Explosion-proof rear cover; 9. Cooling fan. Detailed Implementation
[0017] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be introduced in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment.
[0018] In the description of this embodiment, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. 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 has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0019] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0021] refer to Figures 1 to 3 One embodiment of this utility model provides an explosion-proof electric torque wrench with dual charging modes, including a housing 1 and a hollow explosion-proof inner shell 2 fixed inside the housing 1. A battery compartment 21 is provided at the bottom of the explosion-proof inner shell 2, and a battery mechanism 3 is installed inside the battery compartment 21. (Reference) Figure 3 The battery mechanism 3 includes a battery pack 31 and a controller board 32. The battery pack 31 is a lithium battery charging pack. The controller board 32 is fixed to the top of the battery compartment 21 by a controller fixing plate 33. The battery pack 31 is inserted into the battery compartment 21 and located below the controller fixing plate 33. (Reference) Figures 4 to 7 The battery compartment 21 has a charging port 211 on its side, and a DC female connector 34 is provided inside the charging port 211. The DC female connector 34 is electrically connected to the battery pack 31 and the controller board 32. A pin socket 35 is fixed in the controller fixing plate 33. Two blade male connectors 36 are inserted in the pin socket 35. The blade male connectors 36 are made of copper alloy. The battery pack 31 has a blade female connector 37. The blade male connectors 36 are electrically connected to the battery pack 31 and the controller board 32 by being inserted into the blade female connectors 37.
[0022] Because the contact points in the DC female connector are relatively small, with a small contact area and high resistance, they cannot safely withstand the large current required for fast charging. Therefore, the explosion-proof electric torque wrench designed in this utility model has two charging modes: a slow charging mode and a fast charging mode. When the electric torque wrench is not urgently needed, slow charging is performed by plugging an external charger into the charging port 211. The controller board 32 identifies the voltage or resistance signal and activates the slow charging mode, connecting the battery pack 31 through the DC female connector 34 for slow charging with a small current. When fast charging is urgently needed, after plugging an external charger into the charging port 211, the controller board 32 identifies and activates the fast charging mode, connecting the battery pack 31 through the blade male connector 36 and blade female connector 37 to transmit a large current for fast charging. The design of the blade male connector 36 and blade female connector 37 in this utility model has a large contact area and extremely low contact resistance, which can withstand higher currents, increase the current conduction area, and achieve high charging efficiency. Electrical energy can be efficiently and directly delivered to the battery pack. At the same time, it can reduce heat generation and loss during the charging process, and has a good heat dissipation effect, avoiding high temperature during charging.
[0023] refer to Figure 3 and Figure 4In this embodiment, a motor assembly 4 electrically connected to the battery mechanism 3 is fixed in the upper inner cavity of the explosion-proof inner shell 2. A reduction gearbox 5 and a torque transmission mechanism 6 are sequentially connected to the output end of the motor assembly 4. A head shell 7 is fitted over the reduction gearbox 5 and the torque transmission mechanism 6. The rear end of the head shell 7 is fixedly connected to the explosion-proof inner shell 2. An explosion-proof bottom plate 22 covers the bottom opening of the battery compartment 21, and an explosion-proof rear cover 8 covers the rear end of the explosion-proof inner shell 2. A cooling fan 9 is provided between the outer shell 1 and the explosion-proof rear cover 8 to dissipate heat and cool the motor assembly 4 during operation. (Reference) Figure 1 and Figure 9 In this utility model, the bottom of the explosion-proof inner shell 2 and the explosion-proof base plate 22 can be designed with a circular structure to form an electric wrench with a circular bottom, or they can be designed with a square structure to form an electric wrench with a square bottom.
[0024] This embodiment features an explosion-proof inner shell 2 that isolates electrical components prone to short-circuit sparks or explosions from the external mine environment, achieving its own explosion-proof effect and preventing dangerous situations such as fires and explosions caused by circuit failures or explosions within the mine. During operation, power is supplied by the battery mechanism 3, and the motor assembly 4 drives the reduction gearbox 5, which in turn drives the torque transmission mechanism 6. This multiplies the motor's torque output to the power output shaft of the torque transmission mechanism 6, thereby increasing the wrench's working torque to complete the installation and removal of high-torque bolts or nuts.
[0025] refer to Figure 4 , Figure 8 and Figure 10 In some embodiments, the battery compartment 21 has an unlocking hole 212 on its side, and a battery unlocking button 38 passes through the unlocking hole 212. A latch 39 is provided between the battery compartment 21 and the battery pack 31. The latch 39 may be made of zinc alloy. The middle part of the latch 39 is pivotally connected to the inner wall of the battery compartment 21. One end of the latch 39 has an opening groove 391, and the end of the battery unlocking button 38 is vertically embedded in the opening groove 391. A first spring 393 abuts between the battery unlocking button 38 and the opening groove 391. The other end of the latch 39 has a protruding locking block 392. The side of the battery pack 31 has a locking groove 311. The locking block 392 and the locking groove 311 are positioned correspondingly. When the battery pack 31 is installed in the battery compartment 21, the locking block 392 is locked inside the locking groove 311. When the battery pack 31 needs to be removed, press the battery unlock button 38 to push one end of the opening slot 391 of the latch 39 inward. Through the pivotal connection between the latch 39 and the battery compartment 21, one end of the locking block 392 is disengaged from the slot 311, thus removing the restriction on the battery pack 31 and allowing the battery pack 31 to be removed from the battery compartment 21. When installing the battery pack 31, simply push the battery pack 31 into the battery compartment 21 and slide it along the wedge-shaped surface of the locking block 392 until the locking block 392 is finally inserted into the slot 311, fixing the position of the battery pack 31 and preventing it from coming loose.
[0026] refer to Figure 4 and Figure 10 In some embodiments, the battery pack 31 is provided with an external charging port 312 near the blade socket 37 for connecting to an external power source to charge the battery pack 31. The electric torque wrench of this invention can remove the battery pack 31 for separate charging through the external charging port 312, or insert the battery pack into the battery compartment 21 for online charging through the charging socket 211.
[0027] refer to Figure 11 In some embodiments, a handle groove 313 is provided on the surface of the battery pack 31 adjacent to the explosion-proof base plate 22, and a handle ring 314 is hinged in the handle groove 313. The battery pack 31 can be removed from the battery compartment 21 by rotating the handle ring 314, and the handle ring 314 can also be stored in the handle groove 313, saving internal space of the battery compartment 21 when the explosion-proof base plate 22 covers the bottom opening of the battery compartment 21.
[0028] refer to Figure 4 , Figure 5 , Figure 7 and Figure 10 In some embodiments, a vertically arranged button plate 215 is fixed on the controller mounting plate 33. The button plate 215 is electrically connected to the controller plate 32. A horizontal adjustment hole 213 is provided on the side of the battery compartment 21, and the adjustment hole 213 corresponds to the position of the button plate 215. An adjustment button 214 is inserted into the adjustment hole 213. One end of the adjustment button 214 extends out of the battery compartment 21, and the other end can be vertically connected to the button plate 215. A second spring 216 abuts against the adjustment button 214 and the adjustment hole 213. The connection surface between the adjustment button 214 and the adjustment hole 213 is an explosion-proof mating surface. By pressing the adjustment button 214, the output torque of the electric wrench can be adjusted, limiting the maximum output torque at each gear.
[0029] refer to Figure 3 , Figure 6 and Figure 10 In some embodiments, the charging port 211 is covered with a threaded cover 217, which is threadedly connected to the charging port 211 to protect the charging port 211 and provide waterproof, moisture-proof and dustproof effects. The connection surface between the threaded cover and the charging port 211 is an explosion-proof joint surface.
[0030] refer to Figure 1 , Figure 3 and Figure 4In some embodiments, a speed regulating mechanism 23 is installed in the central cavity of the explosion-proof inner shell 2. The speed regulating mechanism 23 includes a connected signal switch 231 and a speed regulating button 232. The signal switch 231 is fixedly connected to the explosion-proof inner shell 2 via a fixing bracket 233, which may be made of zinc alloy. A T-shaped threaded ring 234 is provided in both the outer shell 1 and the explosion-proof inner shell 2. An explosion-proof mating surface is provided between the T-shaped threaded ring 234 and the explosion-proof inner shell 2 to ensure the explosion-proof effect of the threaded mating surface. The speed regulating button 232 is movably connected within the T-shaped threaded ring 234. By manually adjusting the amount of pressure applied to the speed regulating button 232, the motor speed can be changed in real time, thereby achieving flexible control of the output torque of the electric torque wrench.
[0031] In this utility model, the head housing 7, the explosion-proof inner housing 2, the explosion-proof rear cover 8, and the explosion-proof base plate 22 are all made of stainless steel. The explosion-proof performance of the electric torque wrench provided by this utility model meets the relevant provisions of standards GB / T3836.1-2021 "Explosive Atmospheres - Part 1: Equipment - General Requirements" and GB / T3836.2-2021 "Explosive Atmospheres - Part 2: Equipment Protected by Explosion-proof Enclosures 'd'".
[0032] Although the preferred embodiments of this utility model have been disclosed above, they are not intended to limit this utility model. Any person skilled in the art can make possible changes and modifications to the technical solutions of this utility model by utilizing the methods and techniques disclosed above without departing from the spirit and scope of this utility model. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solutions of this utility model shall fall within the protection scope of the technical solutions of this utility model.
Claims
1. A dual-charging mode explosion-proof electric torque wrench, characterized in that, It includes an outer shell (1) and a hollow explosion-proof inner shell (2) fixed inside the outer shell (1). The bottom of the explosion-proof inner shell (2) is provided with a battery compartment (21), and a battery mechanism (3) is installed inside the battery compartment (21). The battery mechanism (3) includes a battery pack (31) and a controller board (32). The controller board (32) is fixed to the top of the battery compartment (21) by a controller fixing plate (33). The battery pack (31) is inserted inside the battery compartment (21) and located below the controller fixing plate (33). The bottom opening of the battery compartment (21) is covered with an explosion-proof bottom plate (22). The battery compartment (21) has a charging port (211) on its side. The charging port (211) has a DC female connector (34) inside. The DC female connector (34) is electrically connected to the battery pack (31) and the controller board (32). The controller fixing plate (33) has a pin socket (35) fixed in it. Two blade male connectors (36) are inserted in the pin socket (35). The battery pack (31) has a blade female connector (37). The blade male connector (36) is electrically connected to the battery pack (31) and the controller board (32) by being inserted into the blade female connector (37).
2. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, The battery compartment (21) has an unlocking hole (212) on its side, and a battery unlocking button (38) is inserted through the unlocking hole (212). A latch (39) is provided between the battery compartment (21) and the battery pack (31). The middle part of the latch (39) is pivotally connected to the inner wall of the battery compartment (21). One end of the latch (39) has an opening groove (391). The end of the battery unlocking button (38) is vertically embedded in the opening groove (391). A first spring (393) abuts between the battery unlocking button (38) and the opening groove (391). The other end of the latch (39) has a protruding locking block (392). The side of the battery pack (31) has a locking groove (311). The locking block (392) and the locking groove (311) are positioned correspondingly. When the battery pack (31) is installed in the battery compartment (21), the locking block (392) is locked inside the locking groove (311).
3. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, The battery pack (31) is provided with an external charging port (312) for connecting to an external power source to charge the battery pack (31).
4. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, A handle groove (313) is provided on the surface of the battery pack (31) adjacent to the explosion-proof base plate (22), and a handle ring (314) is hinged in the handle groove (313).
5. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, A button plate (215) is fixed on the controller fixing plate (33). The button plate (215) is electrically connected to the controller plate (32). A gear adjustment hole (213) is provided on the side of the battery compartment (21). The position of the gear adjustment hole (213) corresponds to that of the button plate (215). A gear adjustment button (214) is provided inside the gear adjustment hole (213). One end of the gear adjustment button (214) extends out of the battery compartment (21) and the other end can be connected to the button plate (215). A second spring (216) abuts against the gear adjustment button (214) and the gear adjustment hole (213).
6. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, The charging port (211) is covered by a threaded cover (217), and the threaded cover (217) is threadedly connected to the charging port (211).
7. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, The upper inner cavity of the explosion-proof inner shell (2) is fixed with a motor assembly (4) electrically connected to the battery mechanism (3). The output end of the motor assembly (4) is sequentially connected to a reduction gearbox (5) and a torque transmission mechanism (6). The reduction gearbox (5) and the torque transmission mechanism (6) are fitted with a head shell (7). The rear end of the head shell (7) is fixedly connected to the explosion-proof inner shell (2). The rear end of the explosion-proof inner shell (2) is covered with an explosion-proof rear cover (8). A cooling fan (9) is provided between the outer shell (1) and the explosion-proof rear cover (8).
8. The explosion-proof electric torque wrench with dual charging modes according to claim 1, characterized in that, A speed regulating mechanism (23) is installed in the middle inner cavity of the explosion-proof inner shell (2). The speed regulating mechanism (23) includes a connected signal switch (231) and a speed regulating button (232). The signal switch (231) is fixedly connected to the explosion-proof inner shell (2) through a fixing bracket (233). A T-shaped threaded ring (234) is provided in the outer shell (1) and the explosion-proof inner shell (2). The speed regulating button (232) is movably connected in the T-shaped threaded ring (234).