61results about How to "Anti-rotation" patented technology

The invention relates to a material testing machine-based ball screw assembly axial static stiffness testing clamp. The clamp comprises a pull-up block, wherein the pull-up block is provided with at least two pull rods; one end of each pull rod is connected with the pull-up block, and the other end of each pull rod is connected with a pressing block; the pressing block is provided with an inner hole through which a ball screw to be tested passes; the upper end of the pressing block is provided with a round chamfer; the pressing block is provided with an adjusting block; the adjusting block is provided with an inner hole through which the ball screw to be tested passes, the lower part of the inner hole is provided with a conical hole and the conical hole is contacted with the round chamfer of the pressing block; and the adjusting block is provided with a nut for connecting the ball screw to be tested. Through the clamp, the axial static stiffness of the ball screw assembly can be tested on the conventional material testing machine; the cost for testing the axial static stiffness of the ball screw assembly is reduced; the testing accuracy is improved; and the clamp has the advantage of compact structure.

The invention discloses a method for detecting and recognizing the tying of a safety belt of a driver based on interval-maximizing and multi-sample dictionary learning. The method comprises the following steps: treating a driver-containing data-concentrated part of a windshield of a left half car as an image to be processed for input; acquiring a feature vector representation of each image; performing dictionary learning process for a training data set by an interval-maximizing and multi-example manner; respectively training an SVM (Support Vector Machine) multi-classifier for each type in the training data set after clustering to obtain a classifying model; coding the training data through the acquired dictionary; training the classifier through the coded feature vectors; detecting and recognizing an image to be recognized through the trained classifier, so as to determine whether the safety belt is tied from the image to be recognized. According to the recognizing method and system for the safety belt, the safety belt can be simply and easily detected and recognized, the popularization capacity is high, the detection and recognition accuracy is high, and the speed is fast; in addition, the influences of illumination and noise and other adverse factors can be effectively overcome.

The invention relates to a hydraulic cylinder. The hydraulic cylinder comprises a cylinder barrel and a piston rod, wherein the piston rod is positioned in the cylinder barrel and is provided with a guide hole. The hydraulic cylinder further comprises a guide rod and a locking mechanism, wherein the guide rod is in match with the guide hole in the piston rod in order to limit the piston rod to rotate relatively to the guide rod; and the locking mechanism is used for controlling the guide rod and the piston rod to switch between a locking state in which the cylinder barrel can not relatively rotate and an unlocking state in which the cylinder barrel can relatively rotate. According to the technical scheme, the piston rod can be prevented from rotating under the combined action of the piston rod, the guide rod and the locking mechanism; the locking mechanism can be switched between the locking state and the unlocking state; and once the locking mechanism is in the unlocking state, the angle of the piston rod can be conveniently adjusted, so that the purpose of preventing the piston rod from rotating can be realized, and the angle position of the piston rod can be randomly adjusted.

The invention discloses a minimally-invasive lumbosacral vertebrae axial fusion inner fixing system with a lock. The system is characterized in that a multi-hole connecting block is included, a locating aiming device and a screw implanting device are arranged on the multi-hole connecting block respectively, a locating aiming mechanism is arranged on the locating aiming device, and a fixing device is arranged between the multi-hole connecting block and the screw implanting device. As an improvement, through holes are evenly formed in the multi-hole connecting block, and the locating arming aiming device and the screw implanting device are arranged on the through holes of the multi-hole connecting block respectively. Fastening holes corresponding to the through holes are formed in the multi-hole connecting block. The fastening holes are connected with the fastening bolts in a thread mode. The system is simple in structure, the number of adjustable parts is small during using, operation is easy and convenient, the fact that displacement errors are small can be guaranteed, and implantation accuracy is improved.

The invention discloses a field depth expanding method of a microscopic image, comprising the following steps: selecting a reference image to carry out colorful space conversion on a source image; matching images in a converted colorful space so as to fuse and reconstruct the image aligned to the space; and finally, obtaining an anti-color-cast result image. The invention also discloses a field depth expanding device of the microscopic image, comprising an image reference module, an image conversion mould, an image matching module, an image fusing module and an image reconstructing module. As the method and the device, disclosed by the embodiment of the invention is adopted, field depth expansion can be rapidly carried out on a blurred picture sequence which has larger rotation and scale zooming, caused by different reasons, so that a clear reconstructed image is automatically synthesized, and a color cast problem of the field depth expansion of a colorful image is effectively solved; and meanwhile, the time complexity and the space complexity of an algorithm are very low and can be realized by very low hardware cost. The field depth expanding performance, the processing speed, the cost performance and the like of the method and the device are better than those of the existing field depth expanding system.

The invention relates to an upper sliding block pressing mechanism of a powder forming machine. The upper sliding block pressing mechanism comprises an upper sliding block ball head screw adjusting mechanism, a hydraulic cushion pressure display mechanism, a protective demoulding mechanism, a synchronous pressing and final pressurizing mechanism and a powder pressing and shifting mechanism. The invention provides the upper sliding block pressing mechanism of the powder forming machine, which has the advantages of reliability in forming products, and stable operation.

The invention discloses an integrated drink preservation barrel system. The integrated drink preservation barrel system comprises a housing and an inner container wrapped by the housing, wherein the inner container is divided into two layers, and comprises a gas storage tank arranged at the upper layer and used for storing gas and a drink barrel arranged at the lower layer and used for storing liquid drinks; the gas storage tank and the drink barrel are coaxially arranged up and down; a gas channel which can be communicated or cut off is formed between the gas storage tank and drink barrel; the drink barrel is provided with a liquid outlet end and a flow-out liquid channel which enables the liquid outlet end to be opened or closed; a control system is arranged above the gas storage tank and used for controlling the connection and disconnection of the gas channel and controlling the start and stop of the flow-out liquid channel in a linked manner. According to the integrated drink preservation barrel system, as the gas storage tank, the drink barrel and an ice cake accommodating area are sequentially arranged in the housing from top to bottom to form an integrated structure, the integrated drink preservation barrel system is compact in structure and convenient to carry, can maintain the flavor and the taste of beer to the last drop, and therefore, can be widely applied to various occasions such as parties, sport matches, caterings, feasts and outdoor tours.

The invention relates to a plug and a socket for a radio frequency connector, and a self-locking anti-rotation radio frequency connector. Through the insertion of a first anti-rotation mechanism axially disposed on the end surface of the plug housing and a second anti-rotation mechanism axially disposed on the end surface of the socket housing, the purpose of circumferential rotation of the plug housing and the socket housing is achieved; and by arranging a screw sleeve on the connecting sleeve to lock the internal teeth and arranging a screw sleeve on the screw sleeve to lock the external teeth, the anti-rotation and anti-looseness purpose between the connecting sleeve and the screw sleeve is achieved through the engagements that the screw sleeve locks the internal teeth and the screw sleeve locks the external teeth. The plug and the socket designed by the invention may quickly realize the function of locking and unlocking the screw sleeve in the process of inserting by setting the guide lock groove and the matching locking protrusion, with no need of a safety hole structure, thereby functioning as anti-rotation of the screw sleeve and anti-looseness of the thread, which not onlyimproves the fastening reliability of the product, but also greatly improves installation and disassembly speed of the product, and the work efficiency, and is very convenient to use.

The invention discloses a laser welding machine with a laser head provided with a protection assembly. The laser welding machine comprises a transverse arm, and the transverse arm is installed on thelaser welding machine. The laser head is installed at the front end of the transverse arm. A first fixing block is welded to the front end of the transverse arm, and a servo motor is fixed to the upper end of the first fixing block. The end portion of an output shaft of the servo motor is fixedly provided with a screw rod through a coupler, and the lower end, away from the servo motor, of the screw rod is rotationally connected with a supporting disc through a bearing. The supporting disc is fixed to the lower side of the laser head, and a transmission nut is connected to the screw rod in a threaded transmission manner. A moving disc is inlaid in the outer side of the transmission nut, and a through hole is formed in the center position of the moving disc. The laser head penetrates the moving disc through the through hole, and a protection cover is arranged on the outer side of the lower end face of the moving disc. The laser head is located in the center position of the interior of the protection cover, and a guide mechanism is arranged on the side, away from the screw rod, of the moving disc. The periphery is isolated and protected when the laser head works, and safety is high.

The invention relates to a bin penetrating structure of cable sealing. The structure is applied into an underwater propulsion motor. When power electricity or a signal is transmitted to a control driver by a power cable or a control cable of the motor, a medium in the motor and a medium in the control driver can be isolated with each other through connecting the power cable or the control cable inthe motor with the power cable or the control cable in the control driver by the structure, namely, a cable sealing structure under the condition of bin penetrating of a cable from a liquid side to an air side is achieved. The structure is simple, is convenient to install and is reliable in sealing and low in cost, the structure is convenient and flexible to install and use, a copper core is usedfor transferring an electric signal or the power electricity, two ends can employ a welding mode, and connection also can be achieved by a wiring terminal as long as a press nut is pressed; and the structure is high in reliability, materials of an insulation sealing sleeve and an insulation sealing cushion employ polytetrafluoroethylene, insulation is ensured after pressing, and meanwhile, the pressure of 20MPa or above can be borne.

The invention relates to continuous conduit type coring equipment which comprises a coring device and a continuous conduit operation device. The coring device comprises an inner pipe assembly and an outer pipe assembly, and the inner pipe assembly can be connected with the outer pipe assembly in a clamping manner; the outer pipe assembly comprises an outer pipe and a drill bit arranged on the outer pipe, and the inner pipe assembly comprises an inner pipe component and a central rod; the inner pipe component comprises a core inner cylinder, a core outer cylinder and a pressure retaining valvearranged at the bottom of the core outer cylinder; and the continuous conduit operation device comprises a continuous conduit and a guiding and injecting integrated mechanism capable of pulling the continuous conduit down or out, wherein the continuous conduit is used for lowering and lifting the inner pipe assembly. The pressure maintaining coring device is lifted up and lowered by using the continuous conduit operation device, a cable can penetrate in the continuous conduit conveniently transmit measurement and control signals, and real-time measurement of hole bottom parameters is facilitated; the guiding and injecting integrated mechanism integrates a guiding function and an injecting function, a guide gooseneck can be omitted, and the height of the equipment can be effectively reduced; and the equipment is particularly suitable for operation environments with the limited space height.

The invention relates to a bearing bushing structure, which comprises a bearing bushing cylinder 1 and a groove 1d arranged in the bearing bushing cylinder 1 and passing through two ends of the bearing bushing cylinder 1. The groove 1d has a large gap when the bearing bushing is in a free state. After the bearing bushing is mounted, radial elastic deformation is generated for the bearing bushing. As radial elastic deformation of the bearing bushing is adopted to serve as a compensation mode, radial interference quantity changes caused as different materials and working temperature changes can be automatically compensated, the applied force between the bearing bushing and the bearing is more stable, the use temperature has a wide change range, and as no particular large interference assembly stress is needed, the overall structural weight is reduced.

The invention relates to an electric cylinder anti-rotation mechanism which comprises a guide rod and a plurality of anti-rotation assemblies, wherein the guide rod is in screw-thread fit with a lead screw nut of an electric cylinder. Each anti-rotation assembly comprises a holder and idler wheels, wherein the holder is fixedly connected with a supporting shell of the electric cylinder, and the idler wheels are arranged on the holder in a rotating mode. Anti-rotation planes are arranged on the outer wall of the guide rod, each anti-rotation plane makes rolling contact with at least one idler wheel, and the center lines of the idler wheels are perpendicular to the center line of the guide rod. The rolling contact between the guide rod and the idler wheels is achieved by simultaneously utilizing the idler wheels and the guide rod, wherein the idler wheels and the guide rod are perpendicularly arranged. When the lead screw nut rotates along with a lead screw shaft, the requirement for the anti-rotation function of the guide rod is met through the contact between the idler wheels and the anti-rotation planes, therefore, rotation prevention of the lead screw nut is achieved, and the lead screw nut can do frontward and backward linear movement relative to the lead screw shaft. Under the linear movement, the guide rod makes rolling contact with the idler wheels, sliding friction produced when rotation prevention is achieved in the prior art is avoided, abrasion is reduced, the load rate and the temperature of a motor are lowered, the service life is prolonged, and reliability is improved in the working process.

The invention specifically relates to a base station component for an individualized implant. The mounting in the manner of adopting an external octagon of a subperiosteal implant for connecting the individualized implant is limited. The base station component comprises a base station main body and a central fixing bolt; an internal octagonal counter bore is formed in a lower end face of the base station main body; a through hole and a stepped hole are formed at the center of the base station main body; the through hole, the stepped hole and the internal octagonal counter bore are communicated with each other. In a mounting process, after the internal octagonal counter bore is nested and fixed with an external octagonal prism arranged at the center of a neck platform of the individualized implant, the central fixing bolt passes through the through hole, the stepped hole and the internal octagonal counter bore in the base station, the lower part of a screw rod is screwed into alveolar bone and is fixedly connected with the alveolar bone and the upper part of the screw rod is screwed into the neck platform of the individualized implant. Due to the dual fixing of the central fixing bolt and the implant as well as the alveolar bone, the connecting strength between the base station and the implant as well as the alveolar bone is increased, the connecting stability is increased, the positioning and anti-rotating properties of the implant are better and bacteria growth is prevented so that the postoperative complication can be effectively reduced.

The invention relates to a method for identifying fingerprints on the basis of a four feature point topological structure, in particular to a method for indentifying the fingerprints to solve the problems in a method for identifying the fingerprints on the basis of feature points that the influence of redundant eigen points is bigger, the noise resisting ability is bad, the reliability is worse and spatial information is not considered. The method comprises: correcting with a pair of center points and triangulation points in two images, respectively arranging the feature points in a database image and an image which needs identifying after correction according to the distance from the image center points in an ascending order, respectively constructing four-point models for the database image and the image which needs identifying after the correction, matching the features points in the database image and the image which needs identifying after the correction, stating the logarithm of matched feature points in the database image and the image which needs identifying after the correction, and judging whether the two images are from one fingerprint. The invention reduces the dependency of a matching algorithm to the location of the core, increases the reliability and the noise resisting ability of the algorithm, and considers the spatial information of the feature points.

The invention discloses a limiting device for a hopper car bottom door opening and closing mechanism, and belongs to the technical field of freight vehicles. The limiting device specifically comprisesan upper transmission shaft, the upper transmission shaft drives a bottom door to be opened or closed through rotation, the limiting device comprises a limiting swing arm fixedly connected with a swing block, and a limiting mechanism which comprises a deflector rod device and a positioning block, and the deflector rod device drives the positioning block to longitudinally move along the guide structure so that the positioning block moves to different positioning gears; the swing block of the upper transmission shaft drives the limiting swing arm to rotate to the positioning blocks of differentgears so that the rotating angle of the upper transmission shaft is limited, and the opening state of the bottom door is controlled. The opening angle and the ballast unloading flow of a ballast unloading bottom door are achieved by controlling the rotating angle of the transmission shaft, and the functions of mistaken rotation prevention, multi-gear ballast unloading flow control and limiting when the bottom door is located at the full-open position are achieved.

The invention relates to the technical field of electric machines, in particular to a motor shaft reduction mechanism including a motor shaft, a motor rear end cover, The motor shaft end part is provided with a friction sleeve which is in contact with the motor shaft end face, the friction sleeve is connected with the motor rear end cover, an elastic member which causes the friction sleeve to be attached on the motor shaft end face is arranged between the motor rear end cover and the friction sleeve, the end face is frictionally, and the motor shaft has self-locking force under the power-off state, the rotational inertia is eliminated, and the effect of decelerating or stopping rotation is good.

The invention discloses a fine adjustment fixing device for machining a capacitor. The device comprises card boards, fixing chucks, locking screws, a fixed assembly head and an adjustment knob, wherein the fixed assembly head is cuboid, the fixing chucks are connected with left and right sides of the top end of the fixed assembly head in a buckling manner, the adjustment knob is connected with themiddle part of the front end in the buckling manner, two card boards are separately arranged on opposite inner side ends of the fixing chucks, opposite outer ends of the fixing chucks are locked andconnected via the locking screws penetrating through the fixing chucks. When the device is in use, synchronous control and fixing of the device by using the single knob can be achieved via a gear anda spring mechanism of the device; when a workpiece is fixed, position adjustment can be more accurate, and the device can be automatically buckled and connected with clamping teeth to prevent backwardrotation when in fine adjustment; and when returning is needed, releasing can be achieved through pulling a little of control knob out, so that the device is convenient to use.

The invention provides a lateral support structure for an eighteen-roll mill. Sectional spindles are connected by seam allowances so as to form a whole spindle; a plurality of backing bearings are uniformly distributed on the spindle; the backing bearings are free from inner ring; separating plates, sealing baffle rings and adjusting rings are designed at the two ends of each of the backing bearings; a hole is formed on each of the adjusting rings; pin shafts penetrate through the holes; grooves are formed on the separating plates and the sealing baffle rings; the pin shafts are blocked in the grooves, so as to achieve an anti-rotating function. The lateral support structure is free from the thickness of the inner ring, the diameter of the spindle can be effectively increased and the support rigidity of the spindle can be increased; due to the design of the sectional spindles, the quantity of the lubricating points corresponding each independent lubricating pipeline is halved and the lubricating efficiency is doubled; the bearings away from the oil gas inlet also can be effectively lubricated; the reliability of the lateral support structure is obviously increased; the lateral support structure especially can stably and reliably support under the serious working conditions, such as, rolling for wider strips and larger support force on the rolling side.

The present invention provides a cylindrical battery negative electrode end cover and a cylindrical battery thereof. The cylindrical battery negative electrode end cover comprises a top cover sheet, ariveting block located above the top cover sheet and isolated from the top cover sheet, and a negative electrode column fixedly connected with the riveting block, wherein the top cover sheet is provided with a first negative electrode installation hole and a second negative electrode installation hole; the negative electrode columns comprise a first negative electrode column and a second negativeelectrode column which are respectively installed in the first negative electrode installation hole and the second negative electrode installation hole in an insulating manner, and the top cover sheet is provided with an overturning sheet located between the first negative electrode column and the second negative electrode column. When the internal air pressure of the battery exceeds a preset value, the overturning sheet is driven by air pressure to overturn towards the riveting block and is in contact with the riveting block so as to be electrically connected with the top cover sheet and thenegative pole. Due to the arrangement of the multi-negative-pole structure, the overcurrent capacity can be improved, the anti-rotation effect can be achieved, the riveting block can serve as an external output component and can also be combined with the overturning piece to form a safety device, the structure is good in compactness, the extra height size is not increased, the volume energy density is high, and the requirements of an existing high-energy-density battery can be met.

The invention discloses a ball valve upstream and downstream seal control method and a control system. According to the method, each of an overhaul seal entering cavity pipeline, an overhaul seal exiting cavity pipeline, a working seal entering cavity pipeline and a working seal exiting cavity pipeline located between a ball valve pressure oil tank and a seal control cabinet is provided with a first valve, a second valve, a third valve and a fourth valve; and during regular check and defect elimination of a unit, the seal control cabinet is manually shielded through closing the first valve, the second valve, the third valve and the fourth valve. The control system comprises the ball valve pressure oil tank, the seal control cabinet, the overhaul seal entering cavity pipeline, the overhaul seal exiting cavity pipeline, the working seal entering cavity pipeline and the working seal exiting cavity pipeline, and each pipeline is provided with the first valve, the second valve, the third valve and the fourth valve. When being used for overhauling the unit, the ball valve ball valve upstream and downstream seal control method and the control system not only can be used for improving the safety, but also have the advantages of high overhaul efficiency, short unit exiting time, low manpower cost and high generating capacity.

A correlation detector of infrared consists of circuit board set with infrared emission circuit, tube body, optical filtering board, top tube cup, bottom tube cup, base and indication lamp. It is featured as setting said tube cups on tube shaft in integral mode, inserting tube shaft set on base into support, enabling tube body to rotate for adjusting tube body to be on optimum correlation angle and enabling to stop rotating of tube body after erection.

The invention relates to an anti-rotation threaded radio-frequency coaxial connector, which comprises a plug and a socket butted with the plug, wherein the plug comprises a first shell, a threaded sleeve, a connecting sleeve and a spring; the socket comprises a second shell; an annular inner tooth belt is arranged on an inner wall of the connecting sleeve; an annular outer tooth belt is arranged on an outer wall of the second shell; the annular inner tooth belt can be meshed with the annular outer tooth belt; L-shaped guide locking grooves are arranged in the threaded sleeve; locking bumps arearranged on the connecting sleeve; and the connecting sleeve elastically moves in the L-shaped guide locking grooves through the spring, thereby achieving locking and unlocking of the threaded sleeve. The invention further relates to a circumferential anti-rotation mechanism, which comprises the second shell and the connecting sleeve, wherein the annular inner tooth belt is arranged on the connecting sleeve; the annular outer tooth belt is arranged on the second shell; and the annular inner tooth belt can be meshed with the annular outer tooth belt. The anti-rotation threaded radio-frequencycoaxial connector is convenient and fast to disassemble, assemble and use, small in volume, reliable in connection and stable in signal, and the self-locking anti-loose function on the threaded sleeveand the anti-rotation function between the shells when the plug and the socket are in a plug-in deadlocking state can be achieved.

The invention discloses a double-row octagonal pipe gripping apparatus. The double-row octagonal pipe gripping apparatus comprises a connecting plate, four double-row octagonal pipes, connecting assemblies, connecting pieces and a plurality of clamping units. A frame is defined by the four double-row octagonal pipes, and the four corners of the frame are fixed through the connecting assemblies. The connecting plate is located at the center position of the frame, and the two ends of the connecting plate make contact with the two double-row octagonal pipes correspondingly. The multiple clampingunits are fixed to the lower ends of the four corners of the frame and the lower end of the connecting plate through the connecting pieces. The double-row octagonal pipe gripping apparatus can conveniently grip workpieces and can be flexibly mounted, demounted and adjusted. The stability and the strength of the frame of the gripping apparatus can be effectively improved, and the safety of the equipment is improved.

The invention relates to a bin penetrating structure of cable sealing. The structure is applied into an underwater propulsion motor. When power electricity or a signal is transmitted to a control driver by a power cable or a control cable of the motor, a medium in the motor and a medium in the control driver can be isolated with each other through connecting the power cable or the control cable inthe motor with the power cable or the control cable in the control driver by the structure, namely, a cable sealing structure under the condition of bin penetrating of a cable from a liquid side to an air side is achieved. The structure is simple, is convenient to install and is reliable in sealing and low in cost, the structure is convenient and flexible to install and use, a copper core is usedfor transferring an electric signal or the power electricity, two ends can employ a welding mode, and connection also can be achieved by a wiring terminal as long as a press nut is pressed; and the structure is high in reliability, materials of an insulation sealing sleeve and an insulation sealing cushion employ polytetrafluoroethylene, insulation is ensured after pressing, and meanwhile, the pressure of 20MPa or above can be borne.

The invention discloses a high-efficiency bolt installation structure, which comprises a screw of which the top end is a nut and the tail end is a threaded section, and also comprises a spacing mechanism; the spacing mechanism comprises a baffle; the diameter of the baffle is greater than that of the nut; the top end of the baffle is fixedly connected with a handle; the bottom part of the baffle is evenly and fixedly connected with a plurality of spacing boards; the spacing boards are attached to the side wall of the nut. According to the high-efficiency bolt installation structure disclosed by the invention, through the handle and the spacing boards, the screw can be prevented from rotating when the nut is screwed on the threaded section, therefore the installation efficiency of the nut is effectively improved, and the connection efficiency of the bolt is further improved.

The invention provides an anti-loosening connecting mechanism. The anti-loosening connecting mechanism is used for achieving penetrating of a connecting body with a thread end and being fixed in a mounting hole of a panel. The anti-loosening connecting mechanism comprises an anti-loosening gasket and an anti-loosening nut. The anti-loosening nut is arranged at the bottom of the thread end. The anti-loosening gasket is arranged at the thread end in a sleeving manner and is located at the position between the anti-loosening nut and the panel. A fixed hole allowing the thread end to penetrate isformed in the middle of the anti-loosening gasket. A locating convex block is arranged on the edge of the fixed hole. A locating groove matched with the locating convex block is formed in one side ofthe thread end. Turnup folded corner portions attached to the surface of the panel are arranged on the corners of the periphery of the anti-loosening gasket. According to the anti-loosening connectingmechanism, button switches or indication lamps or other component products fixed by nuts can be effectively prevented from loosening, potential safety hazards caused by loosening can be avoided, meanwhile, the subsequent equipment maintenance cost is greatly reduced, the structure is simple, and popularization is convenient.

The invention discloses a valve-equipped cylinder special for a polisher, comprising a cylinder body, wherein a piston rod is arranged in the cylinder body, one end of the piston rod passes through the cylinder body, the other end of the piston rod is sleeved with a piston, a piston-near end is provided with a rear cover, and the upper end of the cylinder body is provided with an air inlet valve for controlling an air circuit; and the piston rod is provided with a reset spring. The cylinder has the advantages of durability, energy-saving, no impact sound and small volume, can prevent the piston rod from rotating.