CN113601436A

CN113601436A - Spanner and control method thereof

Info

Publication number: CN113601436A
Application number: CN202110937872.0A
Authority: CN
Inventors: 何陆军
Original assignee: Zhuji Dahe Tools Co ltd
Current assignee: Zhuji Dahe Tools Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-11-05

Abstract

The invention relates to a wrench, which comprises a wrench body and a clamping component arranged at one end of the wrench body, and is characterized in that: the wrench body is provided with a clamping component for clamping the nut; the clamping member includes: the device comprises a first clamping jaw, a second clamping jaw, a sliding rail assembly, a power control part and a stroke detection part, wherein the power control part is used for controlling the first clamping jaw and the second clamping jaw to move relatively close to or away from the sliding rail assembly. The invention can automatically adjust the clamping degree of the wrench paw, is not easy to break, has strong practicability and is easier to popularize.

Description

Spanner and control method thereof

Technical Field

The invention relates to the technical field of wrenches, in particular to a wrench and a control method thereof.

Background

The wrench is called as an adjustable wrench for short, the opening width of the adjustable wrench can be adjusted within a certain range, and the adjustable wrench is a tool for fastening and loosening nuts and bolts with different specifications. The adjustable spanner comprises a head part and a handle part, wherein the head part comprises a movable plate lip, a fixed plate lip, a plate opening, a turbine and a shaft pin, the size of the plate opening can be adjusted by rotating the turbine, the specification is represented by length multiplied by maximum opening width (unit: mm), and electricians commonly use the following components: 150 mm. times.19 mm (6 '), 200 mm. times.24 mm (8'), 250 mm. times.30 mm (10 '), and 300 mm. times.36 mm (12').

After the use, the prior art has the following problems:

firstly, when the wrench is used, the external force is too large, and the thickness of the adjustable wrench is too thin, so that the rigidity of the adjustable wrench is not enough, and the holding part of the adjustable wrench can be broken;

second, the user can run into very narrow place when using the spanner to carry out the operation, can not directly stretch into the interval of the adjustment spanner hand claw of laminating reality with the hand, can only take out the approximate interval of spanner adjustment spanner hand claw, and accommodation process is also very hard simultaneously, the unable accurate object of laminating.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a wrench capable of automatically adjusting the tightness degree of a paw and a control method thereof.

The technical scheme of the invention is realized as follows: the utility model provides a wrench, includes wrench body and sets up at wrench body one end clamping part, its characterized in that: the wrench body is provided with a clamping component for clamping the nut; the clamping member includes: the device comprises a first clamping jaw, a second clamping jaw, a sliding rail assembly, a power control part and a stroke detection part, wherein the power control part is used for controlling the first clamping jaw and the second clamping jaw to move relatively close to or away from the sliding rail assembly;

in the structure, the slide rail assembly is arranged at one end of the wrench body, and the first clamping jaw and the second clamping jaw are horizontally and slidably arranged on the slide rail assembly; the power control component is arranged on the wrench body;

further, in the above structure, the stroke detecting means includes:

the photoelectric transmitting and receiving unit comprises a main control unit, a laser generator controlled by the main control unit and a position sensitive element;

the right-angle reflecting prism is arranged on one side, facing the first clamping jaw, of the second clamping jaw;

the control panel is electrically connected with the main control unit and is used for controlling the main control unit and receiving the displacement signal;

the reflecting prisms, the laser generators and the position sensitive elements are opposite in number and are arranged in one-to-one correspondence; the laser generator and the position sensitive element are both arranged on the first clamping jaw and face the second clamping jaw; the control panel and the output end of the laser generator just face to the inclined plane of the right-angle reflecting prism.

The function of the above structure is: the slide rail component can control the sliding stroke of the first clamping jaw and the second clamping jaw on the wrench body;

through being provided with displacement monitoring part, can detect the relative working distance of first clamping jaw and second clamping jaw, because the nut all is the standard component, consequently can set up the stroke parameter on control panel in advance, and first clamping jaw and second clamping jaw can be monitored by displacement monitoring part, when the data that the monitoring reachs are unanimous with the stroke parameter, the distance between first clamping jaw and the second clamping jaw just is the required distance of this bolt of operation, with the opening size of this accurate control spanner's clamping part, better adaptation bolt, improve user's user demand, and avoid in the use because the opening inaccuracy causes the phenomenon that the nut damaged, perhaps gliding phenomenon appears, with this protection user group.

Preferably: be provided with withstand voltage part on the spanner body, withstand voltage part includes: an outer sleeve body, an inner sleeve body and at least two pressure-resistant pipe fittings,

a pressure-resistant cavity for filling high-pressure gas is arranged in the pressure-resistant pipe fitting; when in use, the pressure-resistant cavity is filled with high-pressure gas for resisting the pressure conducted by the outer sleeve body;

in the structure, the inner sleeve body is accommodated in the outer sleeve body, a sealed outer sleeve cavity is arranged between the inner sleeve body and the outer sleeve body, the pressure-resistant pipe fittings are continuously arranged in the outer sleeve cavity, two adjacent pressure-resistant pipe fittings are fixedly connected, and the pressure-resistant pipe fittings are circumferentially arranged on the outer side wall of the inner sleeve part;

the function of the above structure is: the pressure-resistant cavity can be filled with high-pressure gas, so that the pressure resistance of the pressure-resistant pipe fitting is improved, the pressure-resistant pipe fitting is continuously sleeved in the outer sleeve cavity, the stability of the inside of the pressure-resistant part is ensured, and the pressure resistance of the pressure-resistant part is greatly improved;

the structure has the following effects: as the same amount of steel is known, the cylinder is more pressure-resistant than the cuboid, and the hollow steel pipe with the same mass is more pressure-resistant than the solid steel pipe; therefore, the cross section of the pressure-resistant pipe fitting is circular, so that the pressure-resistant pipe fitting is more pressure-resistant, a sealed pressure-resistant cavity is arranged in the pressure-resistant pipe fitting, and high-pressure gas can be filled into the pressure-resistant pipe fitting, so that the pressure-resistant pipe fitting can better resist the pressure applied from the outside, the pressure resistance of the pressure-resistant pipe fitting is further enhanced, and the pressure-resistant pipe fitting is arranged between the inner sleeve body and the outer sleeve body, so that the pressure-resistant pipe fitting can support the outer sleeve body; with this make the portion of holding of spanner have extremely strong crushing resistance, improved the rigidity of the portion of holding of spanner, make it difficult fracture, improved user's work efficiency, promoted user's experience and felt.

Further: at least two bulges are distributed at intervals along the circumferential direction of the pressure-resistant pipe, and the other side of the pressure-resistant pipe is provided with at least two outward-turning holes which are matched with the bulges; the bulge is provided with a round hole for communicating the pressure-resistant cavity; the plurality of bulges of the pressure-resistant pipe fitting are respectively inserted into the plurality of flanging holes of the other adjacent pressure-resistant pipe fitting, and the outer walls of the adjacent pressure-resistant pipe fittings are mutually contacted;

the function of the above structure is: the opposite two sides of the pressure-resistant pipe fitting are respectively provided with a plurality of bulges, one side of each pressure-resistant pipe fitting is convexly provided with a plurality of outward-turned holes, so that the pressure-resistant pipe fittings can be mutually connected, the circular holes are formed in the bulges, high-pressure air is introduced into the pressure-resistant cavity to be simpler, the outer walls of the adjacent pressure-resistant pipe fittings are mutually contacted, so that a closed space can be formed in all the pressure-resistant pipe fittings, and air leakage is avoided;

the effect that this structure was brought: the design that the two opposite sides of the pressure-resistant pipe fittings are respectively provided with the bulges in a protruding manner and the flanging holes in a concave manner can ensure that a plurality of pressure-resistant pipe fittings are connected with each other without being limited to only two pressure-resistant pipe fittings, and the circular holes are arranged on the bulges, so that high-pressure gas in the pressure-resistant gas cavity can be mutually circulated, and the filling efficiency of a user is improved; in addition, the outer walls of the pressure-resistant pipe fittings are contacted with each other, so that the connection between the two pressure-resistant pipe fittings is more stable, and the breakage of the bulge caused by the fact that the length of the bulge is higher than the depth of the outward-turning hole is avoided; to sum up, strengthened withstand voltage component's crushing resistance, let the difficult fracture of the portion of holding of spanner, improved user's work efficiency, promoted user's experience and felt.

Preferably, the power control means includes: a power output unit and a gear transmission unit;

in the above structure, the gear transmission unit includes a first rack, a second rack and a gear, the power output unit drives the first clamping jaw to slide, and the gear transmission unit drives the second clamping jaw and the first clamping jaw to slide in opposite directions;

the function of the above structure is: the power output unit can provide acting force for sliding the first clamping jaw, and the gear transmission unit can enable the second clamping jaw to move in the opposite direction relative to the first clamping jaw;

when the first clamping jaw moves towards the interior of the wrench through the power output unit, the first clamping jaw also moves inwards, the gear transmission unit fixedly connected with the power output unit also starts to move, and the first rack moves towards the outer side of the wrench through the second rack, so that the first rack moves towards the inner side of the wrench through the gear, and the second clamping jaw also slides towards the interior of the wrench and has the same sliding distance with the first clamping jaw;

when the first clamping jaw moves towards the outside of the wrench through the power output unit, the first clamping jaw also moves outwards, the gear transmission unit fixedly connected with the power output unit also starts to move, and the first rack moves towards the inside of the wrench through the second rack, so that the first rack moves towards the outside of the wrench through the gear, and the second clamping jaw also slides towards the outside of the wrench and has the same sliding distance with the first clamping jaw;

the effect that this structure was brought: the power output unit only needs to provide a sliding force to enable the first clamping jaw to slide; meanwhile, the gear transmission unit fixedly connected with the first clamping jaw starts to work, the second rack can perform a sliding effect corresponding to the first clamping jaw, and the second clamping jaw performs an opposite sliding effect on the first clamping jaw through the gear, so that the second clamping jaw slides in the reverse direction of the first clamping jaw.

Preferably, the power output unit includes: the stretching cylinder, the gas circuit module and the gas supply module are arranged in the stretching cylinder;

in the structure, the wrench body is internally provided with an accommodating space, and the air supply module and the air path module are both arranged in the accommodating space; the gas supply module controls a piston rod of the stretching cylinder to move back and forth through the gas circuit module; the stretching cylinder is arranged on one side of the first clamping jaw, the output end of the stretching cylinder is fixedly connected with the first clamping jaw through the connecting part, the front end and the rear end of the stretching cylinder are respectively provided with two air vent holes, and the air vent holes at each end are respectively used for air intake and air exhaust so as to realize that the piston of the stretching cylinder is driven to perform telescopic motion;

the function of the above structure is: the gas supply module is used for conveying gas to the stretching cylinder, the gas circuit module is used for conveying the gas to the stretching cylinder, the stretching cylinder controls the reciprocating movement of the piston rod by sucking or discharging the gas conveyed by the gas circuit module so as to drive the first clamping jaw to move, and the gas inlet and the gas outlet can control the air pressure change in the stretching cylinder so as to realize the reciprocating movement of the piston rod;

when a user starts to work, the gas supply module generates gas, and the gas is conveyed into the gas inlet hole of the stretching cylinder through the gas circuit module; when the gas is introduced into the gas inlet hole on the outer side of the stretching cylinder, the stretching rod can move towards the inner side of the wrench, so that the first clamping jaw slides towards the inner side of the wrench;

on the contrary, when gas is introduced into the gas inlet hole on the outer side of the stretching cylinder, the stretching rod can move towards the wrench side, so that the first clamping jaw slides towards the outer side of the wrench;

the effect that this structure was brought: the air feed module only needs to provide continuous gas for the stretching cylinder through the gas circuit module, and the gas is let in different inlet ports on the stretching cylinder to realize the flexible removal of stretching pole, thereby controlling the sliding direction of the first clamping jaw, and then realizing the reverse stretching of stretching steel by adjusting the opening and closing of the adjusting valve on the exhaust pipe corresponding to one end of the inlet port, so that the work efficiency of users is improved, and the experience of users is improved.

Preferably, the gas supply module includes: the air source structure comprises a first air pump, a second air pump, a first main pipe and a second main pipe, an air path structure consisting of a first node, a second node, a first air supply branch pipe, a second air supply branch pipe and two air guide pipes, an air supply adjusting structure and a controller for controlling the working states of the first air pump, the second air pump, the first node, the second node and a third node;

the air supply adjusting structure comprises a switching shell consisting of a main air inlet channel;

in the structure, the input end of the first air pump is connected with a first air inlet pipe, the output end of the first air pump is connected with a first main pipe, and the free end of the first main pipe is provided with a node and is connected with a first air supply branch pipe and a second air supply branch pipe through the node to form a first-class sub air supply system;

the input end of the second air pump is connected with a second air inlet pipe, the output end of the second air pump is connected with a second main pipe, and the free end of the second main pipe is provided with a node and is connected with a plurality of air entraining pipes through the node to form a second type sub air supply system;

the switching shell is provided with a first branch port, a second branch port and a third branch port which are respectively communicated with the main air inlet channel;

a first air supply branch pipe of the first-class sub air supply system is communicated to the output end of the main air inlet channel, and the free end of a second air supply branch pipe is communicated to the stretching cylinder through an air passage structure;

the first branch port, the second branch port and the third branch port of the switching shell are respectively provided with an electromagnetic control assembly in a one-to-one correspondence manner, and the electromagnetic control assemblies are used for respectively controlling the opening and closing of the first branch port, the second branch port and the third branch port;

a circulation cavity is arranged in the switching shell; the first branch port, the second branch port and the third branch port are respectively communicated to the circulation cavity; a circulating hole is formed between the circulating cavity and the main air inlet channel;

and the free ends of the air entraining pipes of the second type sub air supply system are respectively communicated to the first branch port and the second branch port, and the air entraining pipes are respectively provided with a stop valve which is electrically connected with the controller.

The function of the above structure is: the controller can receive the electric signal, enable the first air pump and the second air pump to start working, enable the first node and the second node to select pipelines to transmit objects, and enable the main output pipeline to discharge the objects;

a user sends an electric signal to the controller, the controller controls the first air pump and the second air pump to start working, the first air pump sucks gas into a first node, then the gas is divided and introduced into the stretching air cylinder and the main gas inlet channel, meanwhile, the second air pump introduces auxiliary materials into a second node, the second node switches and introduces the auxiliary materials into the electromagnetic control assemblies corresponding to the first branch port or the second branch port, then mixed gas is introduced into the pressure-resistant cavity, after the gas is completely inflated, the user introduces a black metal rust remover into the electromagnetic control assemblies corresponding to the third branch port through the liquid inlet pipe, the three electromagnetic control assemblies are cleaned, the electromagnetic control assemblies can be repeatedly used and are difficult to damage, and then the black metal rust remover is discharged from the pressure-resistant cavity; the working efficiency is improved, and the experience of the user is improved;

the effect that this structure was brought: a user can realize the air supply of the stretching cylinder and the main air inlet channel only by controlling the first air pump through the controller and leading the air into the first type air supply subsystem; the user only needs to control the second air pump through the controller, and the air is led into the second type air supply subsystem, so that the air supply to the first branch port and the second branch port can be realized; the inside of the switching shell can be clear by introducing a ferrous metal rust remover into the liquid inlet pipe; and finally, gas and liquid are discharged through the pressure-resistant cavity, so that the working efficiency is improved, and the experience of a user is improved.

Preferably, the electromagnetic control assembly comprises: an electromagnetic coil; an iron piston; a rubber cap; the iron core, the guide sleeve and the valve seat are arranged in the switching shell;

in the structure, the electromagnetic coil is sleeved outside the guide sleeve, the iron core is installed at the lower end of the guide sleeve, the upper end of the guide sleeve is located outside the air outlet end of the main air inlet channel, the lower valve seat is installed outside the upper end of the guide sleeve, an iron piston with the upper end passing through the upper and lower closing ports is installed inside the guide sleeve, the length of the iron piston is smaller than that of the guide sleeve, a rubber cap is installed at the upper end of the iron piston, an upper valve seat is arranged at a certain distance from the upper end of the rubber cap, and a circulation cavity for conveying air is arranged between the upper valve seat and the lower valve seat; an inner cavity for placing auxiliary materials is formed in the upper end of the upper valve seat, and a heating assembly or a refrigerating assembly is arranged on the periphery of the outer side of the inner cavity;

the function of the above structure is: when the electromagnetic coil is electrified, the iron core can generate attraction force to enable the compression spring to be adsorbed on the iron core, so that the rubber cap moves downwards to close the lower valve seat, and the gas in the inner containing cavity can be introduced into the circulating cavity; when the electromagnetic coil is not electrified, the iron core can generate a repulsive force to enable the compression spring to be far away from the iron core, so that the rubber cap moves upwards to close the upper valve seat, and the auxiliary materials in the inner containing cavity can not be led into the circulation cavity; the heating component can heat the auxiliary materials flowing into the inner containing cavity to enable the inner part of the inner containing cavity to generate negative pressure; the refrigeration component can refrigerate the auxiliary material flowing into the inner cavity to generate negative pressure inside the inner cavity;

when needing to be explained: the target temperature of the heating assembly and the target temperature of the refrigerating assembly cannot influence the work of the rubber cap, the content cavity mentioned in the heating assembly refers to the content cavity communicated with the first branch port, the material cavity mentioned in the refrigerating assembly refers to the content cavity communicated with the second branch port, and when negative pressure exists, the material in the inner containing cavity can be introduced into the circulation cavity;

the effect that this structure was brought: a user can enable the iron piston to be sucked by the iron core only by electrifying the electromagnetic coil to close the lower valve seat, and can realize heating or refrigeration of the auxiliary material in the inner cavity by electrifying the heating assembly and the refrigeration assembly respectively, so that negative pressure is formed in the inner cavity, and the auxiliary material can be discharged into the circulation cavity; the user only needs to stop the circular telegram to solenoid, just can let the iron core reject the iron piston, realizes going up the closure of disk seat to this when realizing the user's operation, the spanner is warm in winter and cool in summer's demand, has improved work efficiency greatly, has promoted user's experience sense.

In addition, the present invention also discloses a method for controlling a wrench, which is suitable for the wrench as claimed in the above claims, and is characterized in that: the method for controlling the wrench clamping jaw comprises the following steps:

a1: selecting corresponding stroke parameters, namely z1, on a control panel in advance according to the size of a nut to be screwed;

a2: starting the first air pump;

a3: the first air pump pressurizes outside air and sends the air to the first main pipe;

a4: the first air pump is respectively sent to the first air supply branch pipe and the second air supply branch pipe through a first node;

a5: high-pressure gas in the second air supply branch pipe enters the stretching cylinder, the piston rod is controlled to retract, and the first clamping jaw and the second clamping jaw are far away from each other;

a6: meanwhile, the laser generator is started through the control panel,

a7: the laser generator emits signals on the corresponding right-angle reflecting prism, and the position sensitive element receives the laser signals reflected by the right-angle reflecting prism, converts the laser signals into displacement signals and transmits the displacement signals to the control panel, wherein the displacement signals are recorded as z 2;

a8: z2 is compared with z1 in the control panel, when z2 is equal to z1, the first air pump stops working, and the clamping jaw stops at a proper position;

the control method has the following functions: the first air pump can pressurize outside air, the first node can shunt air, and the piston rod is used for controlling the moving direction of the clamping jaw;

when a user works, the user presses a button in the control switch group, the controller sends an electric signal to the first air pump, the first air pump starts to pressurize outside air, and meanwhile, an adjusting valve on a second air supply branch pipe connected with the inner side of an air inlet end in the stretching air cylinder is opened, so that the pressurized air enters the stretching air cylinder, and the piston rod retracts; conversely, an adjusting valve on a second air supply branch pipe connected to the outer side of the air inlet end in the stretching cylinder is opened, pressurized air enters the stretching cylinder, and a piston rod extends out, so that the tightness operation of the clamping jaw is realized;

meanwhile, the stroke of the first clamping jaw and the stroke of the second clamping jaw can be quickly and accurately controlled and adjusted according to the size of the nut by presetting parameters and monitoring the stroke of the displacement monitoring part, so that the use convenience is improved.

The control method has the following effects: the user only needs to start first air pump, just can aerify stretching cylinder, and the rethread adjusts the governing valve on the second air feed branch pipe that the inlet end both sides are connected, just can realize that the retraction of piston rod stretches out, has improved work efficiency greatly, has promoted user's experience and has felt.

In a specific embodiment of the invention: the method for enhancing the pressure resistance and the bending strength of the wrench comprises the following steps:

b1: before use, starting the first air pump;

b2: the first air pump pressurizes outside air and sends the air to the first main pipe;

b3: high-pressure gas is respectively sent to the first air supply branch pipe and the second air supply branch pipe through the first node;

b4: and high-pressure gas in the first air supply branch pipe enters the complete pressure-resistant cavity, so that the work is stopped after the air pressure in the pressure-resistant cavity reaches a rated value.

The control method has the following functions: the first air pump can pressurize outside air, the first node can shunt gas, the pressure-resistant cavity can contain high-pressure gas, and the high-pressure gas can improve the rigidity of the wrench;

before a user starts to work, the user presses a button in the control switch group, the controller sends an electric signal to the stop valves on the first air pump and the first air supply branch pipe, the first air pump starts to pressurize outside air, meanwhile, the stop valve on the first air supply branch pipe is opened, high-pressure air in the first air supply branch pipe is completely introduced into the pressure-resistant cavity, the high-pressure air reaches a rated value, and the stop valve on the first air supply branch pipe is closed;

the control method has the following effects: the user only need start first air pump, opens the stop valve on the first air feed branch pipe simultaneously, just can let in high-pressure gas in withstand voltage cavity, and when high-pressure gas reached the rated value, closed the stop valve on the first air feed branch pipe, just the rigidity of promotion spanner that can furthest makes it be difficult for receiving external pressure's influence to the spanner fracture has promoted user's experience and has felt.

In a specific embodiment of the invention: the temperature control method of the wrench body comprises the following steps:

c1: starting the second air pump;

c2: the second air pump extrudes and conveys the outside air to the second main pipe;

c3: the second main pipe is respectively sent to each air-entraining pipe through a second node;

c4: according to the external environment requirement, the required stop valve is opened, when the external air is cold, the air is sent into the first branch port, the heating is carried out, the air is sent into the pressure-resistant cavity, when the external air is cold and hot, the air is sent into the second branch port, the cooling is carried out, and the air is sent into the pressure-resistant cavity.

The control method has the following functions: for the external air extruded by the second air pump, the control method can heat or cool the external air so as to meet the requirement of the external environment and finally send the external air into the pressure-resistant cavity;

in summer, a user presses a button in the control switch group, the controller transmits an electric signal to the second air pump and the stop valves on the two air guide pipes, the second air pump starts to pressurize outside air, meanwhile, the stop valves on the air guide pipes corresponding to the second branch openings are opened, high-pressure gas in the second main pipe is completely introduced into the second branch openings and is subjected to cooling treatment, then the high-pressure gas is introduced into the pressure-resistant cavity, and when the high-pressure gas reaches a rated value, the stop valves on the air guide pipes corresponding to the second branch openings are closed;

when winter, the user is through pressing the button in the control switch group, the controller conveys an electric signal to the stop valve on second air pump and two bleed pipes, the outside air of second air pump begin to pressurize, the stop valve on the bleed pipe that first branch mouth corresponds simultaneously is opened, the high-pressure gas in the second is responsible for lets in first branch mouth completely and carries out heat treatment, let in high-pressure gas to withstand voltage cavity again, when high-pressure gas reaches the rated value, close the stop valve on the bleed pipe that first branch mouth corresponds.

Compared with the prior art, the invention has the following beneficial effects:

1. a user can introduce high-pressure gas into the pressure-resistant cavity through the gas supply module, and the high-pressure gas can act on the wrench to offset the acting force of external pressure on the wrench, so that the wrench is not easy to break due to the influence of the external pressure, and the rigidity of the wrench is improved; meanwhile, the temperature of the high-pressure gas introduced into the pressure-resistant cavity can be changed artificially along with different seasons, so that the temperature can adapt to the working requirements of users in different seasons;

2. the user can let in high-pressure gas in toward tensile cylinder through the air feed module to this makes tensile pole retract and stretch out the motion, controls the centre gripping work of clamping jaw with this, and the displacement monitoring part through the installation on the clamping jaw lets the size of the nut of the required centre gripping of the perfect adaptation of clamping jaw opening simultaneously, improves the centre gripping precision of spanner, has avoided the damage of spanner and the incident problem of use, has improved work efficiency greatly, has promoted user's experience and has felt.

3. The user can quickly and accurately have the size of the nut and control the opening size of the clamping jaw; the control is accurate high, efficient, the security is high, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a pressure-resistant member according to the present invention;

FIG. 3 is a schematic structural view of the cross section C of the present invention;

FIG. 4 is a schematic view of the power control component of the present invention;

FIG. 5 is a schematic illustration of a power take-off configuration according to the present invention;

FIG. 6 is a schematic view of the gas supply system of the present invention;

FIG. 7 is a schematic diagram of an electromagnetic control assembly according to the present invention.

The examples in the figure are: 1-wrench body, 2-pressure-resistant component, 3-external sleeve body, 4-external sleeve cavity, 5-pressure-resistant pipe fitting, 6-pressure-resistant cavity, 7-internal sleeve body, 8-installation space, 9-round hole, 10-bulge, 11-outward hole, 12-first clamping jaw, 13-second clamping jaw, 14-pressure sensor, 15-stretching cylinder, 16-slide rail component, 17-piston rod, 18-controller, 19-first air pump, 20-first main pipe, 21-first node, 22-second air supply branch pipe, 23-first air supply branch pipe, 24-main air inlet channel, 25-first branch port, 26-second branch port, 27-third branch port, 28-second air pump, 29-second main pipe, 30-second node, 31-water inlet pipe, 32-iron core, 33-sleeve cavity, 34-compression spring, 35-electromagnetic coil, 36-rubber cap, 37-liquid discharge pipe, 38-first rack, 39-gear, 40-second rack, 41-air inlet hole, 42-air outlet hole, 43-air exhaust pipe, 44-regulating valve, 45-liquid inlet pipe, 46-air inlet pipe, 47-air inlet pipe, 48-air guide pipe, 49-inner cavity, 50-heating component, 51-refrigerating component, 52-upper valve seat, 53-transmission pipe, 54-circulation cavity, 55-water outlet pipe, 56-third node, 57-lower valve seat, 58-iron piston, 59-upper and lower closing-in, 60-circulation hole, 61-stop valve, 100-main control unit, 101-laser generator, 102-position sensitive element, 103-right angle reflecting prism and 104-control panel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1-3, the present invention discloses a wrench, which comprises a wrench body 1, wherein in the present embodiment, a clamping member for clamping a nut is disposed on the wrench body; the clamping member includes:

a first jaw 12;

a second jaw 13;

a slide rail assembly 16;

a power control component for controlling the first clamping jaw 12 and the second clamping jaw 13 to move relatively close to or away from each other on the sliding rail assembly 16;

and displacement control means for monitoring and controlling the distance of movement between the first jaw 12 and the second jaw 13;

the slide rail assembly 16 is installed at one end of the wrench body 1, the pressure sensor 14 is installed on the first clamping jaw 12 or/and the second clamping jaw, and both the first clamping jaw 12 and the second clamping jaw 13 are horizontally and slidably arranged on the slide rail assembly 16; the power control component is arranged on the wrench body;

the stroke detection part includes:

the photoelectric transmitting and receiving unit comprises a main control unit 100, a laser generator 101 controlled by the main control unit 100 and a position sensitive element 102;

a right-angle reflecting prism 103 mounted on a side of the second jaw 13 facing the first jaw 12;

and a control panel 104 electrically connected to the main control unit 100, and configured to control the main control unit 100 and receive the displacement signal;

the reflecting prisms 103, the laser generators 101 and the position sensitive elements 102 are arranged in a one-to-one correspondence manner and are opposite in number; the laser generator 101 and the position sensitive element 102 are both mounted on the first clamping jaw 12 and face the second clamp 13; the control panel 104 and the output end of the laser generator 101 are just facing the inclined plane of the right-angle reflecting prism 103.

Example 2 differs from example 1 in that

As shown in fig. 1 to 3, in an embodiment of the present invention, a pressure-resistant member 2 is provided on the wrench body 1, and the pressure-resistant member 2 includes:

an outer sheath 3;

an inner sheath 7;

at least two pressure-resistant pipe fittings 5, wherein a pressure-resistant cavity 6 for filling high-pressure gas is arranged in the pressure-resistant pipe fittings; when in use, the pressure-resistant cavity 6 is filled with high-pressure gas for resisting the pressure conducted by the outer sleeve 3;

in the structure, the inner sleeve body 7 is accommodated in the outer sleeve body 3, a sealed outer sleeve cavity 4 is arranged between the inner sleeve body and the outer sleeve body, the pressure-resistant pipe fitting 5 is continuously arranged in the outer sleeve cavity 4, at least two bulges 10 distributed at intervals along the circumferential direction of the pressure-resistant pipe fitting 5 are convexly arranged on one side of two opposite sides of the pressure-resistant pipe fitting 5 which are circumferentially arranged on the outer side wall of the inner sleeve part 7, and at least two outward-turning holes 11 which are matched with the bulges are respectively arranged on the other side of the pressure-resistant pipe fitting 5;

the bulge 10 is provided with a round hole 9 for communicating with the pressure-resistant cavity 6; the plurality of protrusions 10 of the pressure-resistant pipe 5 are inserted into the plurality of burring holes 11 of the adjacent other pressure-resistant pipe 5, respectively, and the outer walls of the adjacent pressure-resistant pipes 5 are in contact with each other.

Example 3, the difference from example 1 is:

in a specific embodiment of the present invention, the power control means includes:

a power output unit;

a gear transmission unit;

wherein the power output unit drives the first clamping jaw 12 to slide, and drives the second clamping jaw 13 and the first clamping jaw 12 to slide reversely through the gear transmission unit.

In a specific embodiment of the present invention, the power output unit includes: the stretching cylinder 15, the gas circuit module and the gas supply module;

the wrench body 1 is internally provided with an accommodating space 8, and the air supply module and the air path module are both arranged in the accommodating space 8; the air supply module controls a piston rod 17 of the stretching cylinder 15 to move back and forth through the air path module; the stretching cylinder 15 is arranged on one side of the first clamping jaw 12, and the output end of the stretching cylinder is fixedly connected with the first clamping jaw 12 through a connecting part.

The stretching cylinder 15 specifically comprises a stretching cylinder body, two air vent holes are respectively arranged at the front end and the rear end of the stretching cylinder body, and the air vent holes at each end are respectively used for air intake and air exhaust, so that a piston of the stretching cylinder is driven to perform telescopic motion.

Example 4, the difference from example 3 is:

as shown in fig. 6, in an embodiment of the present invention, the gas supply module includes: the air supply structure comprises a first air pump 19, a second air pump 28, a first main pipe 20 and a second main pipe 29, an air path structure comprising a first node 21, a second node 30, a first air supply branch pipe 23, a second air supply branch pipe 22 and two air guide pipes 48, and an air supply adjusting structure comprising a switching shell with a main air inlet channel 24;

a controller 18 for controlling the operating states of the first air pump 19, the second air pump 28, the first node 21, the second node 30 and the third node 56;

the input end of the first air pump 19 is connected with a first air inlet pipe 46, the output end of the first air pump 19 is connected with a first main pipe 20, the free end of the first main pipe 20 is provided with a node, and the first air supply branch pipe 23 and the second air supply branch pipe 22 are connected through the node to form a first type sub air supply system;

the input end of the second air pump 28 is connected with a second air inlet pipe 47, the output end of the second air pump 28 is connected with a second main pipe 29, the free end of the second main pipe 29 is provided with a node, and the node is connected with a plurality of air guide pipes 48 to form a second type sub air supply system;

the switching shell is provided with a first branch port 25, a second branch port 26 and a third branch port 27 which are communicated with the main air inlet channel 24 respectively;

a first air supply branch pipe 23 of the first-class sub air supply system is communicated to the output end of the main air inlet channel 24, and the free end of a second air supply branch pipe 22 is communicated to the stretching cylinder 15 through an air passage structure;

the first branch port 25, the second branch port 26 and the third branch port 27 of the switching shell are respectively provided with electromagnetic control assemblies in one-to-one correspondence, and the electromagnetic control assemblies are used for respectively controlling the opening and closing of the first branch port 25, the second branch port 26 and the third branch port 27;

a circulation chamber 54 is arranged inside the switching shell; the first branch port 25, the second branch port 26 and the third branch port 27 are respectively communicated to the circulating cavity 54; a flow hole 60 is formed between the flow cavity 54 and the main air inlet passage 24;

the free ends of the air-entraining pipes 48 of the second type sub air supply system are respectively communicated to the first branch port 25 and the second branch port 26, and the air-entraining pipes 48 are respectively provided with a stop valve which is electrically connected with the controller.

A wrench as claimed in claim 6, wherein said electromagnetic control assembly includes:

an electromagnetic coil 35;

a ferrous piston 58;

a rubber cap 38;

a core 32;

the guide sleeve 33 is used for enabling the iron piston 58 to slide up and down, and an upper closing-in port 59 and a lower closing-in port are arranged on the inner side of the upper end of the guide sleeve;

and valve seats including an upper valve seat 52 and a lower valve seat 57;

the electromagnetic coil 35 is sleeved outside the guide sleeve 33, the iron core 32 is mounted at the lower end of the guide sleeve 33, the upper end of the guide sleeve 33 is located outside the air outlet end of the main air inlet channel 24, the lower valve seat 52 is mounted outside the upper end of the guide sleeve 33, an iron piston 58 with the upper end passing through an upper closing port 59 and a lower closing port 59 is mounted inside the guide sleeve 33, the length of the iron piston 58 is smaller than that of the guide sleeve 33, the rubber cap 38 is mounted at the upper end of the iron piston 58, the upper valve seat 52 is arranged at a certain distance from the upper end of the rubber cap 38, and a circulation cavity 54 for conveying air is arranged between the upper valve seat 52 and the lower valve seat 57; an inner containing cavity 49 for containing auxiliary materials is formed in the upper end of the upper valve seat 52, and a heating assembly 50 or a refrigerating assembly 51 is arranged on the periphery of the outer side of the inner containing cavity 49.

Example 5

In addition, in an embodiment of the present invention, a method for controlling a wrench is further disclosed, which is suitable for the wrench, and is characterized in that: the method for controlling the wrench clamping jaw comprises the following steps:

a1: selecting corresponding stroke parameters, namely z1, on the control panel 104 in advance according to the size of the nut to be screwed;

a2: starting the first air pump 19;

a3: the first air pump 19 pressurizes the outside air and sends it to the first main pipe 20;

a4: the first air pump 19 is respectively sent to a first air supply branch pipe 23 and a second air supply branch pipe 22 through a first node 21;

a5: high-pressure gas in the second air supply branch pipe 22 enters the stretching cylinder 15, the piston rod 17 is controlled to retract, and the first clamping jaw and the second clamping jaw are far away from each other;

a6: at the same time, the laser generator 102 is activated via the control panel 104,

a7: the laser generator 101 emits signals on the corresponding right-angle reflecting prism 103, and the position sensitive element 10 receives the laser signals reflected by the right-angle reflecting prism 103, converts the signals into displacement signals and transmits the displacement signals to the control panel 104, wherein the displacement signals are recorded as z 2;

a8: z2 is compared with z1 in the control panel, when z2 is equal to z1, the first air pump stops working, and the clamping jaw stops at a proper position.

In a specific embodiment of the invention: the control method of the wrench comprises a method for enhancing the pressure resistance and the bending strength of the wrench, and comprises the following steps:

b1: before use, the first air pump 19 is activated;

b2: the first air pump 19 pressurizes the outside air and sends it to the first main pipe 20;

b3: the first air pump 19 is respectively sent to the first air supply branch pipe 23 and the second air supply branch pipe 22 through the first node 21;

b4: the high-pressure gas in the first air supply branch pipe 23 completely enters the pressure-resistant cavity 6, so that the pressure inside the pressure-resistant cavity 6 stops working after reaching the rated value.

In a specific embodiment of the invention: the control method of the wrench comprises a temperature control method of the wrench body, and comprises the following steps:

c1: the second air pump 28 is started;

c2: the second air pump 28 pumps the outside air to the second main pipe 29;

c3: the second main pipe 29 is respectively sent to each air-entraining pipe 48 through the second node 30;

c4: according to the requirement of the external environment, the required stop valve 61 is opened, when the external air is cold, the air is sent to the first branch port 25 to be heated and sent to the pressure-resistant cavity 6, and when the external air is cold and hot, the air is sent to the second branch port 26 to be cooled and sent to the pressure-resistant cavity 6.

In addition, after a certain time, the rust remover can be fed into the main flow pipeline along the third branch port, the first air pump is started, air is filled into the main flow pipeline, the rust remover is pushed into the pressure-resistant chamber, and the corrosion phenomenon caused by wet and cold air in the pressure-resistant chamber is clear.

It should also be noted that:

working principle of the pressure-resistant member: when the spanner is used by a user, high-pressure gas is introduced into the pressure-resistant cavity inside the pressure-resistant sleeve, and then in the using process of the user, the high-pressure gas can generate force to resist the pressure applied outside the spanner, so that the spanner cannot break.

The working principle of the clamping component is as follows: the displacement monitoring part can detect the relative running distance of the first clamping jaw and the second clamping jaw, because the nuts are standard parts, stroke parameters can be set on the control panel in advance, the first clamping jaw and the second clamping jaw can be monitored by the displacement monitoring part, and when the monitored data are consistent with the stroke parameters, the distance between the first clamping jaw and the second clamping jaw is the distance required by operating the bolt, so that the size of an opening of the clamping part of the wrench is accurately controlled, and the size of the nut is matched;

the working principle of the power control part is as follows: the gas pipe lets in gas toward the inlet port in the stretch cylinder outside, makes the piston rod move to the outside, drives first clamping jaw and slides on slide rail assembly, and then drives the gear drive part motion that links to each other with first clamping jaw for the second clamping jaw is reverse equidistance motion with first clamping jaw.

The working principle of the gas supply system is as follows: the controller receives the electrical signal, control first air pump and second air pump and begin work, first air pump lets in the first node with the gas of absorption, the controller conveys an electrical signal to first node this moment, let first node with gaseous transmission to withstand voltage cavity or main inlet channel in, simultaneously, the auxiliary material that the second air pump will absorb lets in the second node, the controller conveys an electrical signal to the second node, let the second node with the material transmission to first branch mouthful with the second branch mouthful in the corresponding electromagnetic control assembly of arbitrary one, let last obtained gas let in withstand voltage cavity through main output channel again, the rethread withstand voltage cavity is discharged to external environment.

The working principle of the electromagnetic control assembly is as follows: the iron core can generate an attractive force or a repulsive force to the iron piston through the electrifying state of the electromagnetic coil so as to control the up-and-down movement of the rubber cap to close or open the upper valve seat and the lower valve seat, when the upper valve seat is closed, gas is introduced into the circulation cavity, and the gas in the inner containing cavity is heated or refrigerated through the heating assembly or the refrigerating assembly, so that negative pressure is generated inside the inner containing cavity; when the lower valve seat is closed, the gas in the inner cavity can be introduced into the circulating cavity under the action of negative pressure.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a wrench, includes wrench body (1) and sets up at wrench body one end clamping part, its characterized in that: the clamping member includes:

a first jaw (12);

a second jaw (13);

a slide rail assembly (16);

the power control part is used for controlling the first clamping jaw (12) and the second clamping jaw (13) to move relatively close to or away from the sliding rail assembly (16);

and a stroke detection part;

the sliding rail assembly (16) is mounted at one end of the wrench body (1), the pressure sensor (14) is mounted on the first clamping jaw (12) or/and the second clamping jaw (13), and the first clamping jaw (12) and the second clamping jaw (13) are horizontally arranged on the sliding rail assembly (16) in a sliding manner; the power control component is arranged on the wrench body, and a pressure-resistant component (2) is arranged on the wrench body (1);

the stroke detection part includes:

the photoelectric transmitting and receiving unit comprises a main control unit (100), a laser generator (101) controlled by the main control unit (100) and a position sensitive element (102);

a right-angle reflecting prism (103) installed on one side of the second clamping jaw (13) facing the first clamping jaw (12);

and a control panel (104) electrically connected with the main control unit (100) and used for controlling the main control unit (100) and receiving the displacement signal;

the reflecting prisms (103), the laser generators (101) and the position sensitive elements (102) are arranged in a one-to-one correspondence manner and are opposite in number; the laser generator (101) and the position sensitive element (102) are both mounted on the first clamping jaw (12) and face the second clamp (13); the control panel (104) and the output end of the laser generator (101) are just towards the inclined plane of the right-angle reflecting prism (103).

2. A wrench as claimed in claim 1, wherein:

the pressure-resistant member (2) includes:

an outer sheath (3);

an inner sleeve body (7);

at least two pressure-resistant pipe fittings (5), wherein a pressure-resistant cavity (6) for filling high-pressure gas is arranged in the pressure-resistant pipe fittings; when in use, the pressure-resistant cavity (6) is filled with high-pressure gas for resisting the pressure conducted by the outer sleeve body (3);

the inner sleeve body (7) is accommodated in the outer sleeve body (3), a sealed outer sleeve cavity (4) is arranged between the inner sleeve body and the outer sleeve body, the pressure-resistant pipe fitting (5) is continuously arranged in the outer sleeve cavity (4), and the pressure-resistant pipe fitting is circumferentially arranged on the outer side wall of the inner sleeve member (7).

3. A wrench as claimed in claim 1 or 2,

at least two bulges (10) which are distributed along the circumferential direction of the pressure-resistant pipe fitting (5) at intervals are convexly arranged on one side of two opposite sides of the pressure-resistant pipe fitting (5), and at least two outward-turning holes (11) which are mutually matched with the bulges (10) are respectively arranged on the other side of the pressure-resistant pipe fitting;

the bulge (10) is provided with a round hole (9) used for communicating the pressure-resistant cavity (6); the plurality of bulges (10) of the pressure-resistant pipe fitting (5) are respectively inserted into the plurality of flanging holes (11) of the other adjacent pressure-resistant pipe fitting (5), and the outer walls of the adjacent pressure-resistant pipe fittings (5) are contacted with each other.

4. A wrench as claimed in claim 3, wherein said power control means comprises:

a power output unit;

a gear transmission unit;

wherein the power output unit drives the first clamping jaw (12) to slide, and drives the second clamping jaw (13) and the first clamping jaw (12) to slide reversely through the gear transmission unit.

5. A wrench as claimed in claim 4, wherein said power take-off unit comprises:

a stretching cylinder (15);

a gas circuit module;

a gas supply module;

the wrench comprises a wrench body (1), an air supply module and an air path module, wherein the wrench body (1) is internally provided with an accommodating space (8), and the air supply module and the air path module are both arranged in the accommodating space (8); the air supply module controls a piston rod (17) of the stretching cylinder (15) to move back and forth through the air circuit module; the stretching cylinder (15) is arranged on one side of the first clamping jaw (12), and the output end of the stretching cylinder is fixedly connected with the first clamping jaw (12) through a connecting part.

6. A wrench as claimed in claim 5, wherein said gas supply module comprises:

an air supply structure comprising a first air pump (19), a second air pump (28), a first main pipe (20) and a second main pipe (29);

the air path structure comprises a first node (21), a second node (30), a first air supply branch pipe (23), a second air supply branch pipe (22) and two air guide pipes (48);

a supply air regulating structure comprising a switching housing having a main intake passage (24);

a controller (18) for controlling the operating states of the first air pump (19), the second air pump (28), the first node (21), the second node (30) and a third node (56);

the air supply system comprises a first air pump (19), a first main pipe (20), a first air inlet pipe (46), a first air supply branch pipe (23), a second air supply branch pipe (22), a second air supply branch pipe (46), a second air supply branch pipe (22) and a third air supply branch pipe (20), wherein the input end of the first air pump (19) is connected with the first air inlet pipe (46), the output end of the first air pump (19) is connected with the first main pipe (20), and the free end of the first main pipe (20) is provided with a node and is connected with the first air supply branch pipe (23) and the second air supply branch pipe (22) through the node to form a first type sub air supply system;

the input end of the second air pump (28) is connected with a second air inlet pipe (47), the output end of the second air pump (28) is connected with a second main pipe (29), and the free end of the second main pipe (29) is provided with a node and is connected with a plurality of air guide pipes (48) through the node to form a second type sub air supply system;

the switching shell is provided with a first branch port (25), a second branch port (26) and a third branch port (27) which are communicated with the main air inlet channel (24) respectively;

a first air supply branch pipe (23) of the first type sub air supply system is communicated to the output end of the main air inlet channel (24), and the free end of a second air supply branch pipe (22) is communicated to the stretching cylinder (15) through an air passage structure;

the first branch port (25), the second branch port (26) and the third branch port (27) of the switching shell are respectively provided with electromagnetic control assemblies in one-to-one correspondence, and the electromagnetic control assemblies are used for respectively controlling the opening and closing of the first branch port (25), the second branch port (26) and the third branch port (27);

a circulation cavity (54) is arranged in the switching shell; the first branch port (25), the second branch port (26) and the third branch port (27) are respectively communicated to a circulation cavity (54); a circulating hole (60) is arranged between the circulating cavity (54) and the main air inlet channel (24);

the free ends of air entraining pipes (48) of the second type of sub air supply system are respectively communicated to the first branch port (25) and the second branch port (26), and stop valves electrically connected with the controller are respectively arranged on the air entraining pipes (48).

7. A wrench as claimed in claim 6, wherein said electromagnetic control assembly includes:

an electromagnetic coil (35);

a ferrous piston (58);

a rubber cap (38);

a core (32);

the guide sleeve (33) is used for enabling the iron piston (58) to slide up and down, and an upper closing port and a lower closing port (59) are arranged on the inner side of the upper end of the guide sleeve;

and a valve seat comprising an upper valve seat (52) and a lower valve seat (57);

the electromagnetic coil (35) is sleeved on the outer side of the guide sleeve (33), the iron core (32) is installed at the lower end of the guide sleeve (33), the upper end of the guide sleeve (33) is located on the outer side of the air outlet end of the main air inlet channel (24), the lower valve seat (52) is installed on the outer side of the upper end of the guide sleeve (33), an iron piston (58) with the upper end penetrating through an upper closing port and a lower closing port (59) is installed inside the guide sleeve (33), the length of the iron piston (58) is smaller than that of the guide sleeve (33), the upper end of the iron piston (58) is provided with a rubber cap (38), an upper valve seat (52) is arranged at a certain distance from the upper end of the rubber cap (38), and a circulating cavity (54) for conveying air is arranged between the upper valve seat (52) and the lower valve seat (57); the upper end of the upper valve seat (52) is provided with an inner cavity (49) for placing auxiliary materials, and the outer side of the inner cavity (49) is circumferentially provided with a heating component (50) or a refrigerating component (51).

8. A method of controlling a wrench, which is suitable for use in a wrench as claimed in any one of claims 1 to 7, characterized in that: the method for controlling the wrench clamping jaw comprises the following steps:

a1: selecting corresponding stroke parameters, namely z1, on a control panel (104) in advance according to the size of a nut to be screwed;

a2: starting the first air pump (19);

a3: a first air pump (19) for pressurizing the outside air and sending the air to a first main pipe (20);

a4: the first air pump (19) is respectively sent to the first air supply branch pipe (23) and the second air supply branch pipe (22) through a first node (21);

a5: high-pressure gas in the second air supply branch pipe (22) enters the stretching cylinder (15), the piston rod (17) is controlled to retract, and the first clamping jaw (12) and the second clamping jaw (13) are far away from each other;

a6: meanwhile, the laser generator is started through the control panel,

a7: the laser generator (101) emits signals on the corresponding right-angle reflecting prism (103), and the position sensitive element (102) receives the laser signals reflected by the right-angle reflecting prism (103), converts the signals into displacement signals and transmits the displacement signals to the control panel (104), wherein the displacement signals are recorded as z 2;

a8: z2 is compared with z1 in the control panel (104), when z2 is equal to z1, the first air pump (19) stops working, and the clamping jaws stop at proper positions.

9. A method of controlling a wrench as claimed in claim 8, wherein: the method for enhancing the pressure resistance and the bending strength of the wrench also comprises the following steps:

b1: before use, the first air pump (19) is started;

b2: a first air pump (19) for pressurizing the outside air and sending the air to a first main pipe (20);

b3: the first air pump (19) is respectively sent to the first air supply branch pipe (23) and the second air supply branch pipe (22) through a first node (21);

b4: the high-pressure gas in the first air supply branch pipe (23) completely enters the pressure-resistant cavity (6), so that the work is stopped after the air pressure in the pressure-resistant cavity (6) reaches a rated value.

10. A method of controlling a wrench as claimed in claim 9, wherein: the method also comprises a temperature control method of the wrench body, and comprises the following steps:

c1: starting the second air pump (28);

c2: the second air pump (28) pumps and conveys the outside air to the second main pipe (29);

c3: the second main pipe (29) is respectively sent to each air guide pipe (48) through a second node (30);

c4: according to the requirement of the external environment, the required stop valve (61) is opened, when the external air is cold, the air is sent into the first branch port (25), the air is heated and sent into the pressure-resistant cavity (6), and when the external air is cold and hot, the air is sent into the second branch port (26), the air is cooled and sent into the pressure-resistant cavity (6).