32results about How to "Small recoil" patented technology

The invention discloses a folding hydraulic power auto-swing fire nozzle, comprising a nozzle, a handle operating mechanism, an outlet bend pipe, a positioning locking mechanism, a inflow bend pipe, a vertical shaft, a connecting rod base I, a connecting rod I, a butterfly bolt, a connecting rod II, a connecting rod base II, a sliding block locking mechanism, a sliding block, a round driving disc, a impeller, a driving shell, a cone gear I, a cone gear II, a chassis, a horizontal locking mechanism, a mother board, a stabilizer positioning mechanism and a stabilizer. The impeller is driven by press water to rotate, a pair of cone gears which are meshed with each other are driven by the impeller to pass a horizontal rotating to a vertical direction and the nozzle is driven to swing by a crank connecting link mechanism which is composed of the sliding block, the round driving disc, the connecting rod and the inflow bend pipe. The spraying with a certain of pitch angle and swing frequency can be realized by the fire nozzle in a broad coverage area; the operation is flexible without human intervention; the folded floor area of the invention is small, thus applicable to storing and moving. The invention is especially suitable to the extinguishing situation in which people are difficult to approach and the fire nozzle needs strong mobility.

The invention discloses a multifunctional shovel which comprises a rod body, an LED lighting device, a holding portion and a handle head. The rod body structurally comprises an inner rod and an outer rod, wherein the outer rod is sleeved at one end of the inner rod, and can slide relative to the inner rod, at least one through hole is formed in the outer rod, a location portion is arranged at one end, close to the outer rod, of the inner rod, a location spring is arranged between the location portion and the inner rod, and the inner rod and the outer rod are respectively provided with anti-slip plastic. The handle head comprises a shovel surface and a shovel handle, wherein the shovel surface and the shovel handle are integrally formed, the shovel handle is hollow, is arranged at one end of the inner rod in a sleeved mode, and is fixed through a locating bolt, a tooth opening portion is arranged on the front side of the shovel surface, the holding portion is arranged at one end of the outer rod, the holding portion is a cylinder, the two ends of the holding portion are connected with the outer rod respectively through a connecting rod, a holding handle location portion is further arranged at the end of the outer rod, and the LED lighting device is arranged on the side edge of the holding portion. Therefore, the multifunctional shovel can further achieve the purpose of according with human engineering and the purpose of being comfortable in use, increases contact friction force and friction force on the surface of the rod body, can act on a smooth object, buffers recoil in use, can be used in places which are dark, and improves safety.

The invention belongs to the technical field of unmanned plane seeding, and relates to an unmanned plane airborne precision target seeding system and an operation method. The unmanned plane airborne precision target seeding system includes a high pressure gas tank, a constant voltage electric control valve, a seed storer, a ballistic trajectory and a remote wireless control system; the top of theballistic trajectory is provided with a gas inlet, the side wall of the upper part of the ballistic trajectory is provided with a seed inlet; the constant voltage electric control valve includes a constant pressure chamber, a gas inlet port of the constant pressure chamber is connected with the high pressure gas tank through a pipeline. The exhaust port of the constant pressure chamber is connected with a gas inlet of the ballistic trajectory through a steering joint; a seed discharge port of the seed storer is connected with the seed inlet of the ballistic trajectory; and the lower end of theballistic trajectory is provided with a circular-ring seal ring prepared from an elastic material. The outer diameter of the seal ring is matched with the inner diameter of the ballistic trajectory,and the inner diameter of the seal ring is smaller than the particle diameter of a seed; and the remote wireless control system includes an electric control valve signal receiver and an electric control valve controller. The electric control valve signal receiver is electrically connected with the constant voltage electric control valve. The unmanned plane airborne precision target seeding systemimproves the seed germination rate and improves the work efficiency.

The invention discloses an automatic grenade launcher carrying rotor armed unmanned aerial vehicle and belongs to the field of application of rotor unmanned aerial vehicles and automatic grenade launchers. The automatic grenade launcher carrying rotor armed unmanned aerial vehicle comprises a coaxial gasoline-electric hybrid unmanned aerial vehicle, a sight system, a fire control module, an automatic grenade launcher and a remote control firing device. An unmanned aerial vehicle platform which adopts a rotor engine and coaxial double main rotors is small in noise, compact in structure, good inhovering performance and stronger in cruising capacity and carrying capacity. The carried grenade launcher is small in recoil force, and impact on an unmanned aerial vehicle platform is further reduced through vibration reduction of a guide rod spring. The sight system and the fire control module better meet the aimed firing demand of the grenade launcher on the unmanned aerial vehicle platform.

The inventive automatic pistol relates to small arms in particular to the structural design of automatic small arms with the powder gas-operated reloading. A barrel (1) is provided with a tail (2) situated in the lower part of a face of breech and is mounted on a frame (3). A bolt (5) is designed in such a way that the front part thereof is tipped up in the extreme front position and, for this purpose, is provided with a tip up support (19). Bolt lugs (21), which are mounted on the front part of the bolt sides, enter the grooves made on the barrel shank when the barrel is closed in such a waythat they are engaged with locking lugs (23) located in the grooves. A spring-loaded gas piston is provided with a spent case ejecting window and is designed in such a way that, when moving back, it releases the bolt lugs (21) and moves the bolt back, and, when moving forward, it moves the bolt forward, a closing lug (20) being in the piston window, and to twist it downward. A gas chamber is mounted on the chase of the barrel in such a way that it encompasses the barrel, gas-discharge channels being made on the barrel circle.

The invention provides a cannon body structure of a supercritical carbon dioxide gas cannon. The cannon body structure is used for emergency rescue in earthquake relief work, emergency relief and other occasions, and is composed of three parts, namely a carbon dioxide liquid filling assembly, an accelerating section assembly and a cannon barrel assembly. According to the cannon body structure, magnesium powder in a heating pipe releases a large amount of heat after being ignited through an electric spark, so that the temperature and the pressure of carbon dioxide in the liquid filling pipe aresharply increased, and the supercritical state is quickly achieved; when the pressure exceeds the damage limit of a rupture disk, the carbon dioxide is rapidly jetted to push a cannonball; and an acceleration connecting section is composed of an acceleration section and a recoil section, so that the outlet speed of the cannonball is remarkably increased, and meanwhile the length of a cannon barrel is remarkably reduced. The cannon body structure has the advantages of simple structure, safety, reliability, rapidness in filling, portability and high efficiency, and is suitable for emergency rescue.

The invention provides a pneumatic pin shaft disassembling tool for an oil rig. An energy storage cylinder, a middle cover, a main piston cylinder body, a buffer pad, a guide cylinder, a quick exhaustpiston cylinder, a front cover and a sleeve are arranged in a series connection type structure and connected by a tightening screw into a whole to form a shell structure. A hammerhead, a piston rod,a main piston, an impacting pin and a quick exhaust piston are arranged in a series connection type structure and connected into a whole to form an impact component. The impact component is installedin an inner cavity of the shell structure. The back pressure of the piston is reduced during impact by energy storage at the back end of an air cylinder, high-speed jet release at the nozzle and fastexhaust at a front cylinder body, the impact speed of the piston is increased, the kinetic energy is promoted, a quick exhaust mechanism of the impacting pin is added at the central axis position of the piston rod, the striking intensity of the tool is guaranteed, the bounce-back force during operation is also reduced, and equipment continuous working capacity and operating personnel safety are ensured. Through the interlocking design of an air path control system of the pneumatic pin shaft disassembling tool, the single striking and continuous cyclic automatic striking functions are realized.

The invention provides an automatic fire extinguishing system. With the system, a problem of resonance easily caused by a plurality of simultaneously operating extinguishing devices in the system is solved. The automatic fire extinguishing system provided by the invention comprises an induction apparatus, a fire alarm controller, a gas fire-extinguishing control panel, a starting module, an extinguishing device, and a damper. According to the automatic fire extinguishing system provided by the invention, all extinguishing devices in a preset protected zone are started sequentially, such that the phenomenon of resonance is avoided, and a secondary disaster caused by the resonance phenomenon is avoided. Therefore, life and property safeties in the preset protected zone are ensured.

The invention relates to the field of pretreatment equipment in sugar making industry, and discloses a rotary ball-seat hydraulic impact discharging device which comprises a high-pressure spray gun, a ball seat, a horizontal rotating shaft and a supporting frame, wherein the high-pressure spray gun is installed on the ball seat; the ball seat is flexibly supported by the supporting frame; an injection port of the high-pressure spray gun is connected with a water inlet pipe; the horizontal rotating shaft penetrates through the center of the ball seat and is integrally formed with the ball seat; both ends of the horizontal rotating shaft are provided with bearings; the ball seat is installed onto the supporting frame through the bearings, and can horizontally rotate around the horizontal rotating shaft; an extension part is fixed to the lower part of the supporting frame, and falls into a sleeve arranged on the ground; the whole supporting frame can vertically rotate around the sleeve; the horizontal rotating shaft and the extension part of the supporting frame are respectively connected with a horizontal motor and a vertical motor in a driving mode; and the dead weight of the ball seat is 3-10 times of the maximum recoil force borne by the high-pressure spray gun. The rotary ball-seat hydraulic impact discharging device has the characteristic of small recoil force, and is convenient to control.

The invention provides an integrated explosive type reverse-thrust bullet and an emission gun thereof. The bullet comprises a bullet head, a gunpowder cavity and a primer, wherein the gunpowder cavityis a sealed cavity enclosed by the bullet head and a cavity shell; a gun propellant or an explosive is filled in the gunpowder cavity; the cavity shell and the bullet head are integrally formed; a destroying port and a primer groove are further formed in the cavity shell; the primer is loaded in the primer groove; and the primer groove is sealed by a primer cover. According to the integrated explosive type reverse-thrust bullet and the emission gun thereof provided by the invention, the bullet is made to be of an integrated structure, and no disposable cartridge case needs to be specially arranged, so that the recoil is greatly reduced, the shooting frequency, precision and range are improved, the materials are saved, the carrying weight is reduced, and the structure of the gun is simplified.

The invention discloses an oil-mist-free energy-saving and low-consumption pusher leg drill, which has the main technical scheme that a piston is of a three-cylinder structure; support friction pairs are arranged between a beating rod arranged at the front part of the piston and a guide sleeve inner hole, and between a gas distributing rod arranged at the back part of the piston and a valve body inner hole; a gap of the support friction pairs is smaller than a gap between a large circle of the middle part of the piston and a gas cylinder inner hole; the large circle of the middle part of the piston is suspended; a front oil chamber and a back oil chamber are respectively and additionally arranged in vacant positions of a guide body and a valve body and are not mutually communicated; and the dimension of the back end of the gas distributing rod arranged at the back part of the piston meets the requirement that when the piston forwards moves to a state that the back end surface of the large circle of the middle part of the piston is positioned at the back boundary of a gas cylinder exhaust opening, the back end surface of the tail part of the piston lags several millimeters of the back boundary of a valve body return gas inlet. The invention provides the oil-mist-free energy-saving and low-consumption pusher leg drill with the advantages that economization (gas saving) is achieved; the working efficiency is higher; oil-mist-free exhaust can also be realized; good environment-friendly and ecological effects are achieved; in addition, resources are saved; and the structure is more reasonable.

A powder drive type fire extinguishing cannon comprises a powder containing box, a cannon pipe and a main pressure source; the main pressure source pressurizes a cannon pipe from the cannon tail of the cannon pipe, the powder containing box is fixed to the peripheral face of the cannon pipe, the powder containing box comprises an auxiliary pressurizing pipe, a box body, a flow control plate and a steering engine, the auxiliary pressurizing pipe is communicated with the top of the box body, the box body is communicated with the cannon pipe, the connecting position of the box body and the cannon pipe is a flow combining fork, the flow control plate partitions a channel for communicating the box body with the cannon pipe, and the steering engine controls the flow control plate. Powder fire extinguishing agents can be continuously sprayed out, and the beneficial effects of being small in recoil and small in weight are achieved.

This invention relates to an automatic pistol, which comprises gun barrel [2], big recuperator means [4], bolt [26], small recuperator mean [12], pistol body [25], box magazine [24] and firing [27], characterized in that outside the middle of the gun barrel [2] it fixes pipe skirt [3], while in the rear it has air duct hole [6] and lockout convex slot [7]; the big recuperator [4] is covered in the middle of the gun barrel [2], and the bolt [26] is in the middle of the pistol body [25]; the middle of the pistol body [25] has a freeing convex slot [8] whose front is wide, rear is narrow, middle is flat gradient shaped; the box magazine [24] is like the 92-type box magazine, and the firing [27] is in the middle and rear of the pistol body [25]; the hammer [15] and hammer spring [14] is in the lower rear of the bolt [26]; the middle of the sear [17] is like a gourd, having elliptical safety lock [16] in it, and in the left lower of the sear it has sear spring [18]; the firing [27] is tangent with the rear of the sear. Said pistol is locking and reliable with small recoil; besides, it can emit several kinds of cartridge, and can be single-shot or pot-shot.

A general cartridge receiver assembly for front-air-guide firearms is characterized in that a gun barrel is arranged in a cartridge receiver, an air guide protection bush is arranged on the lower side of the front end of the cartridge receiver, a piston rod is arranged in the air guide protection bush, a piston is arranged at the front end of the piston rod, a cavity air guide chamber is reserved on the rear side of the piston, a communication air guide hole is formed between the gun barrel and the air guide chamber, a connecting rod and a firearm bolt shifting rod are arranged at the rear end of the piston rod, a reset spring is arranged on the firearm bolt shifting rod, a firearm bolt is arranged on the rear side of the upper end of the firearm bolt shifting rod, and a cartridge holder is arranged on the lower side of the firearm bolt. An axial firearm bolt spring is arranged on the rear portion of the firearm bolt, an axial firearm bolt lock is arranged in the firearm bolt, an axial firing pin is arranged in the firearm bolt lock, a firing hammer is arranged at the position, arranged at the rear end of the firing pin, of the rear side of the firearm bolt, and a firing gear is arranged at the lower end of the firing hammer. A front-arrangement pushing rod is arranged on the right side of the lower portion of the firing gear, and a trigger is arranged at the front end of the pushing rod. The problem that when a rear-air-guide type firearm performs shooting, a back seat of the firearm bolt affects the firing accuracy is solved, and the general cartridge receiver assembly is suitable for being used by the manufactured firearms such as rifles and submachine guns.

The invention discloses a folding hydraulic power auto-swing fire nozzle, comprising a nozzle, a handle operating mechanism, an outlet bend pipe, a positioning locking mechanism, a inflow bend pipe, avertical shaft, a connecting rod base I, a connecting rod I, a butterfly bolt, a connecting rod II, a connecting rod base II, a sliding block locking mechanism, a sliding block, a round driving disc,a impeller, a driving shell, a cone gear I, a cone gear II, a chassis, a horizontal locking mechanism, a mother board, a stabilizer positioning mechanism and a stabilizer. The impeller is driven by press water to rotate, a pair of cone gears which are meshed with each other are driven by the impeller to pass a horizontal rotating to a vertical direction and the nozzle is driven to swing by a crank connecting link mechanism which is composed of the sliding block, the round driving disc, the connecting rod and the inflow bend pipe. The spraying with a certain of pitch angle and swing frequencycan be realized by the fire nozzle in a broad coverage area; the operation is flexible without human intervention; the folded floor area of the invention is small, thus applicable to storing and moving. The invention is especially suitable to the extinguishing situation in which people are difficult to approach and the fire nozzle needs strong mobility.

The invention provides an anti-low-small-slow-target air-defense missile system for a 40mm rocket launcher and an interception method. A seeker, a battle guiding system, a steering engine, a control cabin, a flight engine, an empennage assembly and a solid rocket launching engine are sequentially connected to form a guided rocket projectile; a ground fire control instrument is fixedly connected to the 40mm rocket launcher and is used for tracking a target, resolving and predicting a target track and providing initial target alignment information for the guided rocket projectile; the solid rocket launching engine is ignited to launch the guided rocket projectile, power is provided by the flight engine after the guided rocket projectile leaves a cylinder, the control cabin takes the initial alignment information as a reference, the real-time position of the guided rocket projectile is calculated, closed-loop control is formed by the real-time position and a predicted target position, and the guided rocket projectile enters a mid-guidance mode; after the target is locked through the seeker, the rocket projectile enters a self-seeking guidance mode, flies to the target and destroys the target through the battle guiding system. According to the anti-low-small-slow-target air-defense missile system for the 40mm rocket launcher and the interception method, the seeker can capture and lock a long-distance infrared characteristic weak target.

The invention relates to a coal mine supporting variable-angle spray structure that uses a sliding ring to change angles of a plurality of arc tubes so as to change the spray angle so that that the spray efficiency of coal mine surrounding rock can be improved effectively. A fixed frame is a concave arc plate; a through hole is formed in a middle portion of the fixed frame; and a plurality of clamping rings are respectively arranged at the outer side of the fixed frame. The clamping rings are arranged obliquely and are connected with the fixed frame at lowest heights; and the clamping rings are made of rigid materials. A plurality of supporting wheels are respectively arranged at the fixed frame and are arranged in the plurality of clamping rings in a one-to-one correspondence manner; andlimiting blocks are arranged at the inner rings of the clamping rings and are opposite to the supporting wheels. One end of a hollow tube is arranged in the through hole of the fixed frame and is connected with the fixed frame and has an enclosed structure. A sliding ring is arranged at the other end of the hollow tube; and a guiding plate is arranged at the sliding ring right above the fixed frame.

An automatic pistol essentially consists of an immovable barrel, a breech with a firing pin and a cartridge extractor, a breech frame, a spring-loaded device for the removal of gas with a gas piston and a gas cylinder, a firing mechanism and a magazine. The barrel is fitted with an end piece, which is located in the lower part of the rear end of the barrel. The design of the breech allows for the displacement of its front part downwards, when the breech is in its front end position. The front part of the breech is fitted with side locking lugs. The corresponding locking grooves are located in the cavities on the end piece of the barrel. The gas piston has an opening for ejecting the cartridge casing. In the course of the backward movement, the gas piston unlocks the breech and draws it back. In the forward movement, the breech is carried forward and pushed downwards. The gas cylinder is located at the front part of the barrel and encompasses the barrel. Along the length of the barrel gas ducts are fixed.

The invention relates to a non-refillable steel cylinder with a safety valve and a self-adaptive pressure relief method for the non-refillable steel cylinder with the safety valve, and the non-refillable steel cylinder can automatically adapt to pressure relief, conveniently controls leakage amount of filled objects, and is relatively high in safety performance. According to the technical scheme adopted by the invention, the non-refillable steel cylinder with the safety valve comprises a steel cylinder body with a pressure relief hole. The non-refillable steel cylinder with the safety valve is characterized in that the safety valve which automatically adapts to pressure relief is arranged in the pressure relief hole, wherein the safety valve is welded to the pressure relief hole of the steel cylinder body. The non-refillable steel cylinder can realize control on leakage amount of the filled objects, and greatly reduces occurrence of potential safety hazards.

The invention is applicable to the technical field of hammers, and provides a hand hammer capable of reducing recoil. The hand hammer comprises a handle and a mounting sleeve fixed to the end part of the handle, wherein a sliding body is arranged in the mounting sleeve, a mounting rod is arranged in the middle of the sliding body in a penetrating manner, a first spring and a second spring which are arranged on the mounting rod in a sleeving manner are arranged at the two ends of the sliding body, and a first hammer head and a second hammer head are arranged at the two ends of the mounting sleeve respectively. According to the hand hammer capable of reducing recoil, recoil can be greatly reduced, noise is low, and a user can easily adapt to the hand hammer.

The pneumatic pin shaft dismounting tool used for petroleum drilling rigs of the present invention includes an energy storage cylinder, a middle cover, a main piston cylinder, a buffer pad, a guide cylinder, a quick-displacement piston cylinder, a front cover and a sleeve in a serial structure The shell structure is arranged and connected as a whole with a tension screw. The hammer head, piston rod, main piston, firing pin and snap piston are arranged in series and connected together to form an impact part; the impact part is installed in the inner cavity of the shell structure. The invention utilizes energy storage at the rear end of the cylinder, high-speed jet release at the nozzle, and quick exhaust of the front cylinder body to reduce the back pressure of the piston during impact, increase the impact speed of the piston and increase the kinetic energy, and increase the force of the striker on the central axis of the piston rod. The rapid exhaust mechanism ensures that the force of the tool is eliminated and reduces the recoil force during operation, ensuring the continuous working ability of the equipment and the safety of the operator; through the interlocking design of the air circuit control system of the pneumatic pin dismounting tool, it is realized It has the functions of single cancellation and continuous cycle automatic cancellation.

The invention relates to a coal mine supporting variable-angle spray structure that uses a sliding ring to change angles of a plurality of arc tubes so as to change the spray angle so that that the spray efficiency of coal mine surrounding rock can be improved effectively. A fixed frame is a concave arc plate; a through hole is formed in a middle portion of the fixed frame; and a plurality of clamping rings are respectively arranged at the outer side of the fixed frame. The clamping rings are arranged obliquely and are connected with the fixed frame at lowest heights; and the clamping rings are made of rigid materials. A plurality of supporting wheels are respectively arranged at the fixed frame and are arranged in the plurality of clamping rings in a one-to-one correspondence manner; andlimiting blocks are arranged at the inner rings of the clamping rings and are opposite to the supporting wheels. One end of a hollow tube is arranged in the through hole of the fixed frame and is connected with the fixed frame and has an enclosed structure. A sliding ring is arranged at the other end of the hollow tube; and a guiding plate is arranged at the sliding ring right above the fixed frame.

The invention discloses a novel nozzle for a high-pressure washer. The novel nozzle comprises a nozzle body. The nozzle body is provided with a jet hole and a guide channel. One end of the guide channel is provided with a guide channel inlet, and the other end of the guide channel is provided with a guide channel outlet. The guide channel inlet is communicated with the guide channel outlet. The guide channel outlet is communicated with the jet hole. The guide channel is arc-shaped. The center line of the guide channel inlet of the guide channel and the axis of the jet hole form an included angle beta of 60-120 degrees. The novel nozzle for the high-pressure washer and a high-pressure spray gun have the advantages that the arc-shaped guide channel is formed in the front of the jet hole, and accordingly pressure loss of high-pressure water is low; the high-pressure water never bounces back, a jet jetted from the jet hole has a small radiation angle smaller than 5 degrees; the radiation angle of the jet jetted from the jet hole is small, and accordingly stress of the jet is concentrated, the jet can produce large impact force, and cleaning effect is better; the jet is concentrated, and accordingly point-to-point cleaning is achieved.

The invention discloses a 3D-printed muffler device, which mainly relates to the field of mufflers. It includes a cylindrical muffler body, and a main air passage that penetrates the muffler body along the axial direction of the muffler body is provided in the middle of the muffler body; the muffler body One end of the muffler is provided with an air inlet end face; the annular array on the outer wall of the muffler body is provided with several curved expansion chamber air passage walls, and the air passage walls between the two adjacent curved expansion chamber air passage walls, the air inlet end face and the outer wall of the muffler main body are arranged in an annular array. The space is a coupled curved surface expansion chamber air channel, and each of the coupled curved surface expansion chamber air channels and the main air channel is provided with several connecting air channels; the annular array in the muffler body is provided with a number of resonance cavities, each of which is A resonance cavity airway is arranged between the resonant cavity and all the coupled curved surface expansion chamber airways; the present invention can separate the air flow in a small space, realize the shunting and mutual coupling of the inner and outer airways, thereby reducing the noise. At the same time, reducing the pressure increase can effectively control the increase in recoil.

The invention discloses an air-leg rock drill without oil mist, energy saving and low consumption. The technical points of the present invention are: the piston has a three-cylindrical structure, the support friction pair is between the striking rod at the front of the piston and the inner hole of the guide sleeve, and between the air distribution rod at the rear of the piston and the inner hole of the valve body, and the gap is larger than the middle part of the piston. The gap between the inner holes of the cylinder is small, and the middle part of the piston is suspended in a large circle; the front oil chamber and the rear oil chamber are respectively added in the gaps between the guide body and the valve body, and the front oil chamber and the rear oil chamber are not connected to each other; the rear part of the piston is air-distributed. The size of the rear end of the rod satisfies: when the piston moves forward to the rear boundary of the cylinder exhaust port, the rear end surface of the piston tail lags behind the rear boundary of the return air inlet of the valve body by several millimeters. The invention provides an oil-mist-free, energy-saving, low-gas-consumption leg that saves (gas) and has higher working efficiency, and realizes exhaust without oil mist, which is good for environmental protection and ecology, saves resources, and has a more reasonable structure. rock drill.

The invention discloses a straight stream water gun used for firefighting. The straight stream water gun comprises a water spraying barrel, a gun base and a handle. An external thread is arranged at one end of the water spraying barrel. One end of the gun base is internally provided with an internal thread matched with the external thread. The water spraying barrel is connected with the gun base through the threads. The water spraying barrel is internally provided with a water spraying channel to communicate with an inner cavity of the gun base. A water inlet is formed in the end, connected with the gun base, of the water spraying channel, and a water spraying outlet is formed in the other end, connected with the gun base, of the water spraying channel. The water inlet is located in one end of the gun base. The water spraying outlet is located in one end of the water spraying channel. The outer wall of the water spraying barrel is sleeved with a rotatable flow adjusting sleeve. A protruding switch knob is further arranged at the front end of the water spraying barrel. The handle comprises a fixed handle body and a movable handle body which are fixed to the upper portion and the lower portion of the gun base correspondingly. A dual-pressure nozzle is installed at the water spraying outlet. According to the straight stream water gun used for firefighting, the range of the water spraying gun can be increased, and the firefighting water gun is simple in structure, convenient to operate, capable of saving time and effort and high in working efficiency.

The invention discloses a multifunctional electric drill. The multifunctional electric drill comprises an electric drill body, a handle, a chuck, a drill bit and a switch, wherein the chuck is arranged at the left end of the electric drill body; an illumination lamp device is arranged at the left end of the chuck; the handle is located at the right end of the electric drill body, and the handle and the electric drill body are of an integrated structure; the switch is located in the connecting position of the electric drill body and the handle; a shock absorption device is arranged in the electric drill body and is composed of two shock absorption springs which are installed side by side. The multifunctional electric drill has the advantages that the shock absorption device is installed, part of recoil generated by the drill bit is counteracted by the elasticity of the springs, the recoil is greatly reduced, and therefore the work efficiency is improved. The added illumination device brings great convenience to workers, and meanwhile the work efficiency of the workers is improved. The handle is provided with a groove, multiple drill bits can be arranged inside to be used, the groove can be also used for containing the original drill bit, and the loss rate of the drill bit is reduced.

The invention discloses a self-aligning universal bearing. The self-aligning universal bearing comprises a seat body, wherein a circular groove is formed in the seat body, a circular disc is arrangedin the circular groove, a plurality of steel balls are arranged between the side edge of the circular disc and the inner wall of the circular groove in an inlaid mode, and a rod end body is arranged at the top of the circular disc; and the rod end body penetrates through the seat body to extend to the position above the seat body, a hollowed-out through hole is formed in the upper part of the rodend body, a movable hole penetrating ball is arranged in the through hole, and a self-lubricating component is arranged between the hole penetrating ball and the rod end body in an inlaid mode. The self-aligning universal bearing has the beneficial effects that besides the functions of rotating and swinging of a common bearing, a head part and a handle part of the seat body are designed and manufactured in a split mode, the head part can perform 360-degree rotation action in the handle, and the firing dead angle is completely eliminated.