Mining flameproof hand-held torque wrench
By isolating motor sparks through a titanium alloy explosion-proof shell and tin bronze connectors, the safety hazards and weight issues of traditional mining torque wrenches are solved, and battery power visibility and safety are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI SANCHUANG INTELLIGENT EQUIP MFG CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional mining torque wrenches lack explosion-proof performance, are prone to safety hazards due to motor sparks and impacts, and have heavy housings and invisible battery power, affecting safety and efficiency.
The explosion-proof housing is made of titanium alloy, combined with multi-layer tin bronze explosion-proof joints and tempered glass observation port, to isolate internal battery and motor sparks. A control module is set up to display the power level, and a planetary gear reduction assembly is used to prevent the spread of sparks and enhance the sealing performance.
It effectively prevents motor sparks from spreading to the outside, reduces weight, ensures battery power is visible, and improves safety and operational efficiency.
Smart Images
Figure CN224407451U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of power tools for mining, specifically relating to a mine explosion-proof handheld torque wrench. Background Technology
[0002] Chinese invention patent CN119427263A discloses a mine-use explosion-proof handheld impact torque wrench. It primarily addresses the shortcomings of traditional electric wrenches, which lack explosion-proof performance. During operation, the internal battery or motor is prone to short circuits due to overheating, generating sparks and potentially causing explosions. Furthermore, traditional electric impact wrenches, due to their high impact frequency and force, can generate sparks upon impact, posing an explosion hazard. When the impact mechanism generates sparks due to collisions, these sparks can reach the outside through the gap between the T-shaped shaft and the head housing, also creating a safety risk. Additionally, due to the harsh environment inside mines, the housing of mine torque wrenches is typically made of stainless steel, increasing their weight. Moreover, workers cannot accurately determine the remaining battery power during daily use, significantly impacting their experience. Summary of the Invention
[0003] The purpose of this invention is to provide a mine-use explosion-proof handheld torque wrench that can prevent sparks generated by the motor from reaching the outside through the cavity where the reduction assembly is located, thus preventing safety hazards.
[0004] The technical solution of this utility model is as follows: a mine explosion-proof handheld torque wrench, including an explosion-proof housing, a motor powered by a battery is installed inside the explosion-proof housing, the output shaft of the motor is connected to a torsion assembly through a reduction assembly, the explosion-proof housing is composed of a control part, a handle part and a drive part, all made of titanium alloy, the bottom of the control part is connected to a bottom cover through a first explosion-proof bonding layer, a control module is also installed inside the control part, the control module is connected to the battery and the motor, the control module is provided with a display screen and a control button, one end of the control button extends to the outside of the control part, an explosion-proof bonding surface with a width of 12~15mm is provided between the control button and the explosion-proof housing, an observation port is provided above the display screen, the observation port is opened on the explosion-proof housing, and the forward rotation, reverse rotation and speed of the motor and the battery power displayed on the display screen are observed in real time through the observation port, a second explosion-proof bonding layer is provided at the observation port, and the second explosion-proof bonding layer is located inside the control part;
[0005] The drive unit has a front housing assembly and a rear cover plate on both sides. A third explosion-proof bonding layer is provided between the rear cover plate and the drive unit. A first explosion-proof bonding member is provided between the front housing assembly and the drive unit. The front housing assembly has a transmission cavity. The motor is located inside the drive unit. The output shaft of the motor extends into the transmission cavity through the explosion-proof cavity. A second explosion-proof bonding member is provided between the motor output shaft and the inner wall of the explosion-proof cavity. The end of the motor output shaft is connected to the rotating shaft in the torsion assembly through the reduction assembly. One end of the rotating shaft is connected to a T-shaped rotor. One end of the T-shaped rotor extends to the outside of the front housing assembly. A third explosion-proof bonding member is provided between the T-shaped rotor and the inner wall of the front housing assembly. The first, second, and third explosion-proof bonding members are all made of tin bronze with a width of 15-18 mm. The first, second, and third explosion-proof bonding layers are all made of tin bronze with a width of 13-16 mm.
[0006] An adjustment section is also provided between the handle and the drive section. The adjustment section contains a button assembly consisting of a switch button and symmetrically arranged directional buttons. The button assembly is connected to the motor through a control module. The start and stop of the motor are controlled by the switch button. The button assembly has a rotatable direction control lever located between the two directional buttons. The direction control lever has a forward rotation position, a stop position, and a reverse rotation position. The direction control lever is rotated to the forward rotation position, the stop position, and the reverse rotation position by pushing the two directional buttons. The direction control lever controls the forward rotation, stop, and reverse rotation of the motor through the control module. One end of both the switch button and the directional buttons extends to the outside of the adjustment section. A fourth explosion-proof connector is provided between the switch button and the directional buttons and the explosion-proof housing. The fourth explosion-proof connector is made of tin bronze with a width of 15~18mm.
[0007] Preferably, the width of the explosion-proof mating surface is 12mm, the width of the first explosion-proof mating member, the second explosion-proof mating member, the third explosion-proof mating member and the fourth explosion-proof mating member are all 15mm wide tin bronze, and the width of the first explosion-proof mating layer, the second explosion-proof mating layer and the third explosion-proof mating layer are all 13mm wide.
[0008] Furthermore, the deceleration assembly includes a planetary gear composed of an internal gear and multiple external gears meshing with it. The multiple external gears are all connected to the rotating shaft through a planetary carrier. The end of the motor output shaft is provided with a rotating gear that meshes with the multiple external gears. When the motor drives the rotating gear to rotate, it drives the multiple external gears to rotate inside the internal gears that mesh with them. The multiple external gears drive the T-shaped rotating head to rotate through the rotating shaft. A pad is provided between the T-shaped rotating head and the front housing assembly. Bearings are symmetrically provided on both sides of the pad, and both the bearings and the pad are located inside the third explosion-proof joint.
[0009] Preferably, a transmission slider is sleeved on the outside of the rotating shaft. One side of the transmission slider abuts against the side wall of the front housing assembly. A rotating groove is formed on the side wall of the transmission slider, and one end of the T-shaped rotating head is located in the rotating groove. A buffer groove is formed on the other side of the transmission slider, and a buffer spring is provided in the buffer groove. The buffer spring is sleeved on the outside of the rotating shaft, and one end of the buffer spring is connected to the planetary carrier of the rotating shaft.
[0010] Furthermore, the observation port is equipped with tempered glass.
[0011] Preferably, a charging plug is provided on the side wall of the control unit, and an explosion-proof connecting ring is provided between the charging plug and the control unit. The charging plug is connected to the battery through a battery protection circuit.
[0012] Furthermore, the adjustment unit is also provided with a mounting bracket inside. One end of the mounting bracket extends vertically into a support part, which is connected to the inner wall of the adjustment unit. The other end of the mounting bracket is provided with a frame, and a button assembly is embedded inside the frame.
[0013] Preferably, the handle portion is covered with a rubber protective layer.
[0014] The beneficial effects of this utility model are as follows: the control unit is connected to the bottom cover by the first explosion-proof bonding layer at the bottom of the control unit; the tempered glass and the second explosion-proof bonding layer are set at the observation port, and an explosion-proof bonding surface is set between the control button and the control unit, so that the battery and control module in the control unit are isolated from the external environment, preventing the electric sparks generated by the battery or control module from spreading to the external environment and causing fire or explosion; at the same time, the working status of the motor and the battery charge can be observed in real time through the observation port; the third explosion-proof bonding layer set between the rear cover and the drive unit and the second explosion-proof bonding member set in the explosion-proof cavity prevent the sparks generated by the motor from spreading to the external environment and the interior of the front shell assembly; the third explosion-proof bonding member seals the T-shaped rotor and the front shell assembly, preventing the sparks generated by the torsion component in the transmission cavity from spreading to the external environment and causing safety accidents. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is the front view of the present invention;
[0018] Figure 3 This is a cross-sectional view of the main view of this utility model;
[0019] Figure 4 This is a cross-sectional schematic diagram of the front shell assembly of this utility model. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0022] When the impact mechanism generates sparks due to collision, the sparks can reach the outside through the gap between the T-shaped shaft and the head housing, which can easily cause fires, explosions, etc. In view of this, the inventors of this application provide a mine explosion-proof handheld torque wrench that can prevent the sparks generated by the motor from reaching the outside through the cavity where the reduction assembly is located, thus preventing safety hazards.
[0023] like Figure 1-4As shown, a mine-use explosion-proof handheld torque wrench includes an explosion-proof housing. Inside the explosion-proof housing is a motor 31 powered by a battery 11. The output shaft of the motor 31 is connected to a torsion assembly 36 via a reduction gear 35. The explosion-proof housing consists of a control unit 1, a handle unit 2, and a drive unit 3, all made of titanium alloy. The battery 11 is placed inside the control unit 1 and powers the entire handheld torque wrench. The bottom of the control unit 1 is connected to a bottom cover 12 via a first explosion-proof bonding layer 12-1. A control module 13 is also installed inside the control unit 2. The control module 13 is connected to the battery 11 and the motor 31... The control module 13 is connected to the machine 31 and is equipped with a display screen and a control button 14. One end of the control button 14 extends to the outside of the control unit 1. There is an explosion-proof mating surface made of tin bronze with a width of 12-15mm between the control button 1 and the explosion-proof housing. Specifically, in this embodiment, the width of the explosion-proof mating surface is 12mm. An observation port 15 is provided above the display screen. The observation port 15 is opened on the explosion-proof housing 1. A second explosion-proof mating layer 15-1 is provided at the observation port 15 and the second explosion-proof mating layer is located inside the control unit 1. Tempered glass is provided at the observation port 15.
[0024] In addition, a charging plug 16 is provided on the side wall of the control unit 1, and an explosion-proof connecting ring is provided between the charging plug 16 and the control unit 1. The charging plug 16 is connected to the battery 11 through a battery protection circuit.
[0025] Based on the above embodiments, the reverse connection protection function of battery 11 is realized through the battery protection circuit; the start and stop of the entire handheld torque wrench and the speed of motor 31 are controlled by the control button 14 and the control module 13. At the same time, the forward and reverse rotation and speed of motor 31 and the power of battery 11 are observed in real time on the display screen through the observation port 16. Meanwhile, the entire explosion-proof housing is made of titanium alloy, which reduces the weight and makes it convenient for staff to handle.
[0026] In this embodiment, the drive unit 3 has a front shell assembly 32 and a rear cover plate 33 on both sides. A third explosion-proof bonding layer 33-1 is provided between the rear cover plate 33 and the drive unit 3. A first explosion-proof bonding member 32-2 is provided between the front shell assembly 32 and the drive unit 3. The front shell assembly 32 has a transmission cavity 32-1. The motor 31 is located inside the drive unit 3. The output shaft of the motor 31 extends into the transmission cavity 32-1 through the explosion-proof cavity 34. A second explosion-proof bonding member 34-1 is provided between the output shaft of the motor 31 and the inner wall of the explosion-proof cavity 34. A reduction assembly 35 is connected to the end of the output shaft of the motor 31. The reduction assembly 35 is located inside the transmission cavity 32-1. A rotating shaft 36-1 in the torsion assembly 36 is connected to one side of the reduction assembly 35. A T-shaped rotating head 36-2 is connected to one end of the rotating shaft 36-1. One end of the T-shaped rotating head 36-2 extends to the outside of the front housing assembly 32, and a third explosion-proof connector 36-3 is provided between the T-shaped rotating head 36-2 and the inner wall of the front housing assembly 32; the first explosion-proof connector 32-2, the second explosion-proof connector 34-1 and the third explosion-proof connector 36-3 are all tin bronze with a width of 15~18mm, and the first explosion-proof bonding layer 12-1, the second explosion-proof bonding layer 15-1 and the third explosion-proof bonding layer 33-1 are all tin bronze with a width of 13~16mm. Specifically, in this embodiment, the width of the first explosion-proof connector 32-2, the second explosion-proof connector 34-1 and the third explosion-proof connector 36-3 is 15mm, and the width of the first explosion-proof bonding layer 12-1, the second explosion-proof bonding layer 15-1 and the third explosion-proof bonding layer 33-1 is 13mm.
[0027] Specifically, such as Figure 3 and Figure 4 As shown, the reduction assembly 35 includes a planetary gear consisting of an internal gear 35-1 and multiple external gears 35-2 meshing with it. The multiple external gears 35-2 are all connected to the rotating shaft 36-1 through a planetary carrier. The end of the output shaft of the motor 31 is provided with a rotating gear that meshes with the multiple external gears 35-2. When the motor 31 drives the rotating gear to rotate, it drives the multiple external gears 35-2 to rotate inside the internal gear 35-1 that meshes with them. The multiple external gears 35-2 drive the T-shaped rotating head 36-2 to rotate through the rotating shaft 36-1. A pad is provided between the T-shaped rotating head 36-2 and the front housing assembly 32. Bearings are symmetrically provided on both sides of the pad, and the bearings and the pad are both located inside the third explosion-proof joint 36-3.
[0028] In addition, a transmission slider 36-4 is sleeved on the outside of the rotating shaft 36-1. One side of the transmission slider 36-4 abuts against the side wall of the front housing assembly 32. A rotating groove 36-6 is opened on the side wall of the transmission slider 36-4. One end of the T-shaped rotating head 36-2 is located in the rotating groove 36-6. A buffer groove is opened on the other side of the transmission slider 36-4. A buffer spring 36-5 is installed in the buffer groove. The buffer spring 36-5 is sleeved on the outside of the rotating shaft 36-1. One end of the buffer spring 36-5 is connected to the planetary carrier of the rotating shaft 36-1.
[0029] Based on the above embodiments, when the motor 31 malfunctions and generates sparks, the third explosion-proof bonding layer 33-1 provided between the rear cover plate 33 and the drive unit 3 prevents the sparks generated by the motor 31 from entering the external environment and causing a fire or explosion; a second explosion-proof bonding member 34-1 is provided between the motor 31 and the reduction assembly 35 to prevent the sparks generated by the motor 31 from entering the interior of the front shell assembly 32.
[0030] In this embodiment, the handle part 2 is fitted with a rubber protective layer 21. An adjustment part 4 is also provided between the handle part 2 and the drive part 3. The adjustment part 4 is provided with a button assembly formed by a switch button 41 and symmetrically arranged turn buttons 42. The button assembly is connected to the motor 31 through the control module 13. The switch button 41 controls the start and stop of the motor 31, and the two turn buttons 42 control the forward rotation, stop and reverse rotation of the motor 31 respectively. One end of the switch button 41 and the turn buttons 42 extend to the outside of the adjustment part 4. A fourth explosion-proof joint 43 is provided between the switch button 41 and the turn buttons 42 and the explosion-proof housing. The fourth explosion-proof joint 43 is made of tin bronze with a width of 15~18mm. Specifically, in this embodiment, the width of the fourth explosion-proof joint 43 is 15mm.
[0031] The adjustment unit 4 is equipped with a mounting bracket 44 inside. One end of the mounting bracket 44 extends vertically into a support part 44-1, which is connected to the inner wall of the adjustment unit. The other end of the mounting bracket 44 is equipped with a frame 44-2. A button assembly is embedded inside the frame 44-2. The button assembly has a rotatable direction control lever 45. The direction control lever 45 is located between two turn buttons 42 and has a forward rotation position, a stop position, and a reverse rotation position. The direction control lever 45 is rotated to the forward rotation position, the stop position, and the reverse rotation position by pushing the two turn buttons 42. The direction control lever 45 controls the forward rotation, stop, and reverse rotation of the motor 11 through the control module 13.
[0032] Based on the above embodiments, the anti-static function of the handle part 2 is achieved by the rubber protective layer 21; by pressing the turn button 42 to push the direction control lever 45 to rotate to different positions, the forward rotation, stop, and reverse rotation of the motor 31 are achieved; in the initial position, the direction control lever 45 is in the stop position; when the turn button 42 on the right side of the adjustment part 4 is pushed, the end of the turn button 42 pushes the direction control lever 45 to rotate, and pushes the turn button 42 on the left side of the adjustment part 4 to the left side of the adjustment part 4, so that the direction control lever 45 is in the forward rotation position. At this time, the motor 31 rotates forward, stops, and reverses. The machine 31 rotates forward under the control of the control module 13. When the steering button 42 on the left side of the adjustment section 4 is pushed, the end of the steering button 42 pushes the direction control lever 45 to rotate and pushes the steering button 42 on the right side of the adjustment section 4 to the right side of the adjustment section 4, so that the direction control lever 45 is in the stop position, and the control motor 31 stops running. If the steering button 42 on the left side of the adjustment section 4 is pushed again, the direction control lever 45 will rotate to the reverse position, and the control motor 31 will rotate in the reverse direction. The forward rotation, stop and reverse rotation of the motor 11 are controlled by three-level adjustment.
[0033] The working principle of this utility model is as follows: Pressing the control button 14 opens the entire handheld torque wrench. At this time, the battery 11 provides power to the motor 31 through the control module 13, and the operating status of the motor 31 is observed on the display screen through the observation port 15. The bottom of the control unit 1 is connected to the bottom cover 12 through the first explosion-proof bonding layer 12-1. The observation port 15 is provided with tempered glass and the second explosion-proof bonding layer 15-1. An explosion-proof bonding surface is provided between the control button 14 and the control unit, so that the battery 11 and the control module 13 in the control unit 1 are isolated from the external environment, so as to prevent the electric sparks generated by the battery 11 or the control module 13 from spreading to the external environment and causing fire or explosion. Pressing the switch button 41 allows the switch button 41 to control the start and stop of the motor 31 through the control module 13. At the same time, the working status of the motor 31 is controlled through the direction button 42 and the control module 13. The speed of the motor 31 is controlled through the control button 14 and the control module 13, and the operating status and speed of the motor 31 are observed in real time through the observation port 15.
[0034] When the motor 31 is running, the rotating gear at the output end of the motor 31 drives multiple external gears 35-2 that mesh with it to rotate together inside the internal gear 35-1. During this process, the third explosion-proof joint layer provided between the rear cover plate 33 and the drive part 3 and the second explosion-proof joint 34-1 provided in the explosion-proof cavity 34 prevent the sparks generated by the motor 31 from spreading to the external environment and the interior of the front shell assembly 32. While the multiple external gears 35-2 are rotating, they drive the rotating shaft 36-1 to rotate. When the rotating shaft 36-1 rotates, it drives the T-shaped rotating head 36-2 to rotate. During this process, the transmission slider 36-4 and the buffer spring 36-5 ensure the stability of the rotation of the T-shaped rotating head 36-2. At the same time, the third explosion-proof joint 36-3 prevents the sparks generated by the torsion assembly 36 in the transmission cavity 32-1 due to collision from spreading to the external environment.
[0035] This utility model uses an explosion-proof housing to isolate the internal battery 11, control module 13, motor 31, reduction assembly 35, and torsion assembly 36 from the external environment. Simultaneously, the first explosion-proof bonding layer 12-1, the second explosion-proof bonding layer 15-1, the explosion-proof bonding surface, and the explosion-proof bonding ring respectively seal the control unit 1 and the bottom cover 12, the observation port 15 of the control unit 1, the control unit 1 and the control button 14, and the control unit 1 and the charging plug 16. The third explosion-proof bonding layer 33-1, the first explosion-proof connector 32-2, and the second explosion-proof connector 34-1 respectively seal the... The drive unit 3 is sealed with the rear cover plate 33, the drive unit 3 with the front shell assembly 32, and the drive unit 3 with the transmission cavity 32-1; the T-shaped turn head 36-2 and the front shell assembly 32 are sealed by the third explosion-proof joint 36-3; the switch button 41 and the turn button 42 are sealed with the adjustment unit 4 by the fourth explosion-proof joint 43, which enhances the sealing performance of the explosion-proof housing and prevents the sparks generated by the battery 11, control template 13, motor 31, deceleration assembly 35 or torsion assembly 36 inside the explosion-proof housing from spreading to the external environment and causing safety accidents.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A mine-use explosion-proof handheld torque wrench, comprising an explosion-proof housing, wherein a motor powered by a battery is installed inside the explosion-proof housing, and the output shaft of the motor is connected to a torsion assembly via a reduction gear assembly, characterized in that, The explosion-proof housing is composed of a control unit, a handle unit, and a drive unit, all made of titanium alloy. The bottom of the control unit is connected to a bottom cover through a first explosion-proof bonding layer. The control unit also contains a control module, which is connected to the battery and the motor. The control module is equipped with a display screen and a control button. One end of the control button extends to the outside of the control unit. There is an explosion-proof bonding surface with a width of 12-15mm between the control button and the explosion-proof housing. An observation port is provided above the display screen and is located on the explosion-proof housing. The observation port allows for real-time observation of the motor's forward and reverse rotation, rotation speed, and battery charge displayed on the display screen. A second explosion-proof bonding layer is provided at the observation port and is located inside the control unit. The drive unit has a front housing assembly and a rear cover plate on both sides. A third explosion-proof bonding layer is provided between the rear cover plate and the drive unit. A first explosion-proof bonding member is provided between the front housing assembly and the drive unit. The front housing assembly has a transmission cavity. The motor is located inside the drive unit. The output shaft of the motor extends into the transmission cavity through the explosion-proof cavity. A second explosion-proof bonding member is provided between the motor output shaft and the inner wall of the explosion-proof cavity. The end of the motor output shaft is connected to the rotating shaft in the torsion assembly through the reduction assembly. One end of the rotating shaft is connected to a T-shaped rotor. One end of the T-shaped rotor extends to the outside of the front housing assembly. A third explosion-proof bonding member is provided between the T-shaped rotor and the inner wall of the front housing assembly. The first, second, and third explosion-proof bonding members are all made of tin bronze with a width of 15-18 mm. The first, second, and third explosion-proof bonding layers are all made of tin bronze with a width of 13-16 mm. An adjustment section is also provided between the handle and the drive section. The adjustment section contains a button assembly consisting of a switch button and symmetrically arranged directional buttons. The button assembly is connected to the motor through a control module. The start and stop of the motor are controlled by the switch button. The button assembly has a rotatable direction control lever located between the two directional buttons. The direction control lever has a forward rotation position, a stop position, and a reverse rotation position. The direction control lever is rotated to the forward rotation position, the stop position, and the reverse rotation position by pushing the two directional buttons. The direction control lever controls the forward rotation, stop, and reverse rotation of the motor through the control module. One end of both the switch button and the directional buttons extends to the outside of the adjustment section. A fourth explosion-proof connector is provided between the switch button and the directional buttons and the explosion-proof housing. The fourth explosion-proof connector is made of tin bronze with a width of 15~18mm.
2. The explosion-proof handheld torque wrench for mining as described in claim 1, characterized in that, The width of the explosion-proof mating surface is 12mm. The width of the first explosion-proof mating member, the second explosion-proof mating member, the third explosion-proof mating member, and the fourth explosion-proof mating member are all 15mm wide tin bronze. The width of the first explosion-proof mating layer, the second explosion-proof mating layer, and the third explosion-proof mating layer are all 13mm wide.
3. The explosion-proof handheld torque wrench for mining as described in claim 1, characterized in that, The deceleration assembly includes a planetary gear consisting of an internal gear and multiple external gears meshing with it. The multiple external gears are all connected to the rotating shaft through a planetary carrier. The end of the motor output shaft is provided with a rotating gear that meshes with the multiple external gears. When the motor drives the rotating gear to rotate, it drives the multiple external gears to rotate inside the internal gears that mesh with them. The multiple external gears drive the T-shaped rotor to rotate through the rotating shaft. A pad is provided between the T-shaped rotor and the front housing assembly. Bearings are symmetrically provided on both sides of the pad, and both the bearings and the pad are located inside the third explosion-proof joint.
4. The explosion-proof handheld torque wrench for mining as described in claim 3, characterized in that, A transmission slider is fitted around the outside of the rotating shaft. One side of the transmission slider abuts against the side wall of the front housing assembly. A rotating groove is provided on the side wall of the transmission slider, and one end of the T-shaped rotating head is located in the rotating groove. A buffer groove is provided on the other side of the transmission slider, and a buffer spring is provided in the buffer groove. The buffer spring is fitted around the outside of the rotating shaft, and one end of the buffer spring is connected to the planetary carrier of the rotating shaft.
5. The explosion-proof handheld torque wrench for mining as described in claim 4, characterized in that, The observation port is fitted with tempered glass.
6. The explosion-proof handheld torque wrench for mining as described in claim 5, characterized in that, A charging plug is provided on the side wall of the control unit, and an explosion-proof connecting ring is provided between the charging plug and the control unit. The charging plug is connected to the battery through a battery protection circuit.
7. The explosion-proof handheld torque wrench for mining as described in claim 6, characterized in that, The adjustment unit is also equipped with a mounting bracket inside. One end of the mounting bracket extends vertically into a support part, which is connected to the inner wall of the adjustment unit. The other end of the mounting bracket is equipped with a frame, and a button assembly is embedded inside the frame.
8. The explosion-proof handheld torque wrench for mining as described in claim 7, characterized in that, The handle is covered with a rubber protective layer.