48results about How to "Force balance" patented technology

The invention discloses a portable banner automatic storage device in the field of banner storage, comprising: a storage cylinder, one end of which is open and the cylinder wall of which is provided with a storage groove; the winding assembly is rotationally arranged in the storage cylinder, and a fixing structure for fixing the banner is arranged on the circumferential surface of the winding assembly; the driving assembly is arranged in the middle of the wall surface of the storage barrel, and the two ends of the winding assembly are synchronously driven through a motor structure and a transmission assembly; the winding device has the beneficial effects that the driving motor is arranged in the middle of the wall surface of the storage barrel, and the two ends of the storage barrel are synchronously rotated through the transmission assembly, so that the stress of the winding assembly and the driving motor is more balanced, the structure is more stable, and the service life is longer.

This invention relates to a dual-cylinder driven linkage type guide vane adjustment mechanism and its adjustment method, comprising a hydraulic cylinder-driven linkage drive mechanism and an electro-hydraulic servo control system. The guide vane in the hydraulic cylinder-driven linkage drive mechanism is fixed on a guide vane rotation shaft. The two ends of the guide vane rotation shaft are rotatably connected to a guide wheel support and a guide vane support seat, respectively. A fixed frame is rotatably connected to the guide vane support seat. Multiple small rotating shafts are evenly arranged along the circumference of the fixed frame, and these small rotating shafts are connected to the guide vane rotation shaft via support pins. A first hydraulic cylinder and a second hydraulic cylinder are movably connected to both sides of the fixed frame, respectively. The controller T3 in the electro-hydraulic servo control system controls the electro-hydraulic servo valve T9 to operate. The first and second hydraulic cylinders are cross-connected, thereby driving the extension of the first hydraulic cylinder and the retraction of the second hydraulic cylinder synchronously. This invention provides a guide vane adjustment mechanism with symmetrical action, rapid response, high precision, and convenient maintenance, suitable for the hydraulic speed control system of high-power wind turbine units.

A self-adaptive wind-resistant and vibration-suppressing shutter unit capable of constraining all shutters belongs to the technical field of ventilation and air conditioning and comprises a shutter unit, a driving assembly and a self-adaptive wind-resistant and vibration-suppressing device. Each shutter unit comprises a window frame and M shutters, and M is larger than or equal to 3; the shutters are hinged to the window frame through rotating shafts arranged at the upper and lower ends of the shutters; the driving assembly is connected with M shutters of the shutter unit; the self-adaptive wind-resistant vibration suppression device is a self-adaptive flexible adsorption belt and is arranged on the windward side of the shutter unit. The two ends of the self-adaptive flexible adsorption belt are fixedly connected to the leftmost shutter and the rightmost shutter of the shutter unit respectively to form flexible constraint, and the middle part of the self-adaptive flexible adsorption belt is adsorbed to the middle shutter in a self-adaptive mode through the windward side air inlet pressure effect to form single-side contact constraint; shutters at the adjacent ends of the left and right adjacent louver units are hinged through rigid connecting rods, and two-force component constraint is formed. Effective cooperative constraint of all the shutters is comprehensively achieved, and then the wind resistance and vibration suppression effects of the shutters are improved.

The application discloses a cotton feeding chain bed and a transportation method thereof, and relates to the technical field of cotton processing equipment. The cotton feeding chain bed comprises at least a first chain bed part and a second chain bed part. The first chain bed part and the second chain bed part can be connected in a transverse direction or a longitudinal direction to form a main body of the chain bed. The first chain bed part and the second chain bed part are stacked in a vertical direction to form an assembly during transportation. The first chain bed part and the second chain bed part are connected by a plurality of first toolings on one side and connected by a plurality of second toolings on the other side. The chain bed is divided into at least two parts, and the assembly is formed by stacking the two parts. The assembly can be loaded into a container, and the chain bed is protected during transportation. The structure of the combined chain bed maintains the original size, and the equipment structure strength and stability remain unchanged during use. The production efficiency remains unchanged.

A plurality of connecting holes matched with connecting bolts are formed in a panel body of the spare tire frame panel, the connecting holes comprise first positioning connecting holes and at least one pair of symmetrical connecting holes, the first positioning connecting holes are formed in one side of the panel body and are in a vertical strip shape, and the second positioning connecting holes are formed in the other side of the panel body and are in a vertical strip shape. The symmetrical connecting holes are formed in the other side of the panel body, and each pair of symmetrical connecting holes and the first positioning connecting hole respectively form a five-hole, six-hole or eight-hole spare tire connecting structure by taking the vertical center line of the first positioning connecting hole as an axial symmetry line. All the auxiliary connecting holes are matched with the first positioning connecting holes to form a three-point mounting structure which is matched with spare tires with different sizes and different hole numbers, and a user connects one hole position of the spare tire with the first positioning connecting holes, so that the other hole positions to be used can be quickly judged, and quick connection is realized. Meanwhile, only ten holes are used, and the hub connecting hole can be generally used for connecting holes of 10 types of hubs with different pitch circle sizes.

The utility model provides a kind of end plate structure and rotor assembly, it is related to motor technical field.End plate structure includes end plate and elastic sheet.End plate is provided with multiple through holes, multiple through holes are annularly distributed around the center of end plate, at least two elastic sheets of opposite or back-to-back setting are provided at each through hole.Multiple through holes and multiple magnetic steel holes set on rotor core are one-to-one corresponding arrangement, therefore, at least two elastic sheets set on the same through hole can effectively play buffering effect to the magnetic steel set in corresponding magnetic steel hole, and at least two elastic sheets of opposite or back-to-back setting not only can increase the contact area of elastic sheet and magnetic steel, to improve buffering effect, but also can make the stress of magnetic steel relatively balanced, ensure that magnetic steel is smoothly in place under the buffering effect of elastic sheet.Visible, the end plate structure provided in the utility model embodiment effectively avoids the problem that magnetic steel and end plate directly collide and appear breakage and jam etc during assembly, significantly improves assembly quality.

The invention relates to the field of electric connectors, in particular to an anti-loosening electromechanical equipment electric connector which comprises a male head, a female head and a locking assembly. The male head comprises a plug shell; the female head comprises a sleeve shell; the locking assembly comprises a groove, a hanging block and a steel clamp. The end surface of the hanging block close to the female head is a matching surface; the matching surface is an inclined surface inclined relative to the plugging direction of the male head and the female head; the end surface, far away from the female head, of the hanging block is a locking surface; the steel clamp comprises a rotating rod and an auxiliary structure; the middle of the rotating rod is bent towards the center of the sleeve shell to form a clamping protrusion. When the male head and the female head are connected in an inserted mode, the auxiliary structure limits rotation of the rotating rod, the clamping protrusion abuts against the locking face, the hanging block is locked in the groove, and before the male head and the female head are pulled away, the auxiliary structure exerts force in the inserting direction to drive the rotating rod to rotate, the clamping protrusion rotates away from the locking face, and the hanging block is unlocked. The direction of the unlocking action of the clamping protrusion and the hanging block of the rotating rod is parallel to the inserting direction of the male head and the female head, operation in a narrow and compact space is facilitated, and the connecting efficiency of the male head and the female head is improved.

This invention relates to the field of bathing aids technology and discloses an improved shower chair structure, including a chair frame assembly, a seat, a backrest, and armrest assemblies. The chair frame assembly is formed by hinged front and rear frames, and a load-bearing structure for mounting the seat is provided between the chair frame assemblies. The load-bearing structure includes a first pivot support at the hinge of the front and rear frames and a second pivot support composed of a first load-bearing column, a second load-bearing column, and a connecting rod. One end of the connecting rod is pivotally connected to the seat by a bolt, and the other end is fitted onto the first load-bearing column. The top end of the connecting rod is placed in a connecting rod limiting groove, and the connecting rod also has a pointed protrusion that abuts against the end of the connecting rod limiting groove when folded. This solves the technical problem in the prior art that shower chairs cannot stand freely after folding and sometimes open on their own, causing safety issues. It provides a new shower chair structure that is simple in structure, low in cost, ergonomically designed, sturdy in support, safe and stable in opening and closing, and healthy and comfortable.

The utility model discloses a tension control device for a cable drum pay-off rack, and relates to the technical field of cable pay-off devices. The first belt pulley is mounted on an input shaft of the reduction gearbox; the mounting frame is arranged on the reduction gearbox; the air cooling cover is arranged on the mounting frame; the clutch is arranged on the mounting frame, and the clutch is located in the air cooling cover; the second belt pulley is installed at the output end of the clutch, a belt is installed between the second belt pulley and the first belt pulley, and the second belt pulley is located in the air cooling cover. According to the utility model, the technical problem of unstable tension of the cable unwinding device in the prior art is solved.

The utility model relates to a kind of lateral clamping guardrail maintenance pile machine, its structure is the hydraulic power station and positioning mechanical arm on vehicle-mounted workstation, positioning mechanical arm end extends to vehicle side surface, positioning mechanical arm end connects installation box, installation box lower part installs exciter, exciter side surface installs hydraulic motor, bottom installs lateral clamping mouth, lateral clamping mouth opening and closing direction is parallel with vehicle direction, installation box both sides are respectively provided with auxiliary support rod.The utility model has the advantages of: (1) small overall structure, suitable for loading in mobile operation vehicle, flexible operation in highway shoulder or narrow construction area;(2) lateral clamping mouth uses ladder structure, realizes the quick positioning of pile body Guiding, can be matched with progressive clamping mode, effectively improve clamping stability and operation safety;(3) auxiliary support rod and clamping mouth synchronous action, and using symmetrical double collaborative structure, can balance stress, reduce equipment body vibration and ensure the stability and safety of operation process.

The utility model belongs to the technical field of reinforcing steel bar processing, and discloses a turnover device and a processing preparation system, the turnover device comprises a seat body, a turnover frame and two driving mechanisms, the turnover frame comprises a side supporting sheet body, an edge supporting sheet body, an adapter sheet body and supporting rotating shafts, the output ends of the two driving mechanisms are connected to the two supporting rotating shafts in a one-to-one correspondence mode, and the two driving mechanisms are connected with the two supporting rotating shafts in a one-to-one correspondence mode. The processing preparation system comprises the turnover device. According to the three-dimensional net overturning device, the two driving mechanisms drive the overturning frame to be switched between the bearing state and the laying-down state, so that the stress of the overturning frame is more balanced, overturning is more stable, the side supporting sheet bodies and the edge supporting sheet bodies on the overturning frame are matched with each other, and the side supporting sheet bodies can be attached to one side face of a three-dimensional net; the temple sheet body can be attached to one end face of the three-dimensional net in the width direction, so that the three-dimensional net is evenly stressed, deformation and damage of the three-dimensional net are avoided, the quality of the three-dimensional net is guaranteed, and the three-dimensional net is safer and more reliable.

This invention provides a server liquid cooling pump, which has the advantages of self-heating using liquid medium, high pump reliability and long service life, self-balancing pump chamber pressure difference, and near-zero leakage risk. Its structure includes a pump casing, a stator-rotor assembly, and an impeller. The stator-rotor assembly is installed inside the pump casing and drives the impeller to rotate, causing the liquid medium to flow within the flow channel. A cooling channel is also provided inside the pump casing, communicating with the flow channel. The liquid medium can enter the cooling channel and immerse the stator-rotor assembly in the liquid medium, thereby dissipating heat from the stator-rotor assembly.

The utility model relates to a composite fiber material forming die structure which comprises a male die block and a female die block which can be separated and combined, the male die block comprises a bottom plate, supporting columns, a pressing plate and inserting columns, the pressing plate is arranged on the bottom plate, and a plurality of supporting blocks are arranged on the periphery of the pressing plate and the periphery of the bottom plate; a partition area is arranged between the supporting blocks on the two sides of the male die block in the length direction, a pushing plate is arranged in the partition area, an air cylinder is arranged on the pushing plate, inserting columns are arranged at the four corners of the pressing plate, and the male die block is arranged in the middle of the surface of the pressing plate. The bearing plate is arranged on the bottom plate and matched with the pressing plate, inserting holes are formed in the four corners of the bearing plate, and concave modules matched with the convex modules are arranged on the surface of the bearing plate; and the contact surface of the convex die block and the concave die block is a concave-convex occlusal surface. The utility model has the advantages of ingenious improvement, simple design structure and convenience in processing and manufacturing.

The utility model discloses a multifunctional hook used for a double-end charging wire and a power bank, the hook comprises a main body, the main body is provided with accommodating grooves, at least two accommodating grooves are arranged side by side, the accommodating grooves can be used for accommodating a connector of a connecting wire, the accommodating grooves are provided with first notches and second notches, and the first notches are communicated with the second notches. The connector can be detachably arranged in the containing groove through the first notch and the second notch. The power bank applies the hook, and the hook is detachably connected with the power bank body. The hook is provided with the two containing grooves, two connectors of the double-end charging wire can be fixed at the same time, and the charging wire can be properly contained. In addition, the connector of the charging line and the hook are easy to disassemble and assemble, and use is convenient for users. The hook not only can be used as a storage accessory, but also can be used as a power bank to be provided for a user as an accessory of a handle, so that the functional use of the hook in different scenes is embodied.

The utility model relates to the technical field of die bonding equipment, in particular to a die bonding head assembly and a die bonder, which comprise a frame, a first moving platform mounted on the frame, a second moving platform capable of reciprocating along the horizontal direction and perpendicular to the moving direction of the first moving platform, and a third moving platform capable of moving along the vertical direction. The fixed binding head is installed on the third moving platform, the first moving platform is further provided with a buffering platform, the buffering platform can move in a reciprocating mode in the horizontal direction and is parallel to the moving direction of the second moving platform, and the buffering platform and the second moving platform move synchronously and are opposite in moving direction. The design of the buffer platform is helpful for balancing the acting force in the operation process of equipment, so that the whole die bonding head assembly is more stable during working, the stability is helpful for improving the die bonding precision, the service life of each part of the equipment can be prolonged, the mechanical wear and fault occurrence probability caused by frequent vibration are reduced, and the production efficiency is improved. The equipment maintenance cost is reduced.

The application provides a high-pressure gas pump, and belongs to the technical field of gas compression devices. The high-pressure gas pump comprises a cylinder body, a first-stage piston is slidably arranged in the cylinder body, the axial middle part of the first-stage piston is hinged to a driving part through a piston pin, the first-stage piston divides the space in the cylinder body into a first-stage cylinder and a second-stage cylinder, and the end of the first-stage cylinder away from the second-stage cylinder is provided with a third-stage cylinder. During operation, the first-stage cylinder acts, synchronously drives the second-stage cylinder and the third-stage cylinder at the two ends of the first-stage cylinder to act synchronously, and the first-stage cylinder is balanced under the combined action of the second-stage cylinder and the third-stage cylinder at the two ends. The first-stage cylinder and the second-stage cylinder are unidirectionally communicated, the second-stage cylinder and the third-stage cylinder are unidirectionally communicated, and after external gas enters the cylinder body from the first-stage cylinder, the external gas is sequentially compressed and pressurized by the second-stage cylinder and the third-stage cylinder and then discharged. The first-stage piston in the high-pressure gas pump is balanced under force, is not prone to wear and tear, and facilitates independent heat dissipation of all the cylinders, and the use performance is improved.

The application discloses a kind of blank active double-point incremental forming processing device and method, belongs to the field of incremental forming.The application provides a kind of blank active double-point incremental forming processing device and method, with double-point work, two 4 degrees of freedom tool head, tool head is actively rotated when processing, spindle can also drive blank rotation, relative friction between tool head and blank, promote material flow and continuous deformation, reduce the requirement of transmission mechanism, improve processing precision;While processing module controls tool head has great flexibility, tool head can be in any spatial position and spindle cooperates and processes, two forming tool heads can be processed according to predetermined rule synchronously or independently, with flexible processing path selection, facilitate the processing of complex shape parts, can greatly improve production efficiency;At the same time, using double tool head hybrid processing, can make blank force more balanced, is conducive to improving forming precision.

This utility model relates to the field of encoder design technology, and more particularly to a hollow encoder with a push-button switch function. It includes a switch body, which comprises a base and a hollow shaft mounted above the base; a rotating shaft, movably sleeved on the outside of the hollow shaft, allowing the rotating shaft to rotate relative to the hollow shaft and move along its axial direction; a pressing plate, movably sleeved on the outside of the hollow shaft and located below the rotating shaft, so that when the rotating shaft moves towards the pressing plate along the axial direction of the hollow shaft, it drives the pressing plate to move towards the base; and a switch signal output component, which includes multiple silicone buttons and signal contacts evenly distributed between the pressing plate and the base for being pressed when the pressing plate moves towards the base.

A kind of charging device for sharing massage device storage device, including outer casing, the storage box for carrying waistband type massager is retractably arranged in outer casing, the power of battery is guaranteed by external socket, the bottom of storage box is fixedly provided with support plate, support plate is formed with the load groove for placing waistband type massager at the center of storage box, the charging port for charging wire to go out is opened in the bottom center of load groove;Between battery and charging port, charging wire is provided, charging wire includes charging head in charging port and soft wire for connecting charging head and battery.The beneficial effects of the utility model are: charging port is set in the bottom center of load groove, optimization returns process, user does not need additional adjustment position to aim at charging head, improves convenience;Soft wire connects charging head and battery, can flexibly bend or stretch when storage box retracts and moves.

The utility model discloses a main shaft of high-speed friction washing equipment, and relates to the technical field of plastic recovery equipment. A plurality of pairs of blade assemblies which are arranged in a 180-degree staggered mode are fixed to the circumference of the outer shaft at equal intervals, each pair of blade assemblies comprises two blades, the two blades are located outside the same circumferential section of the outer shaft, the two blades are arranged in a 180-degree mode, the blades and the axis of the outer shaft are arranged in a 90-degree mode, and the two blades are fixed to a first fixing plate through first bolts. A first reinforcing plate is arranged on one side of the first fixing plate, and the first fixing plate and the first reinforcing plate are welded to a shaft body of the outer shaft. And a pair of discharging blades which are arranged at an angle of 180 degrees are arranged outside the same circumferential section of the discharging end of the outer shaft, and the discharging blades and the blades in the same circumferential direction are arranged at an angle of 180 degrees. According to the utility model, materials can be uniformly dispersed, a stable flow field and multi-angle friction are formed, vibration and abrasion are reduced, and the equipment stability is improved.

The application belongs to the technical field of PCB processing technology and equipment, and particularly relates to a conveying line carrier, which comprises a carrier and a plurality of clamping jigs, the carrier comprises a bearing main body, a plurality of avoiding through grooves are uniformly arranged in the bearing main body, and the bearing main body is used for bearing a PCB substrate; the clamping jig comprises a connecting bottom plate, the connecting bottom plate is located at the lower end of the bearing main body, a jig backing plate is fixed to the upper end of the connecting bottom plate, a plurality of vacuum cavities and a plurality of airflow channels are uniformly arranged in the interior of the jig backing plate, an air valve is fixed to the end of each airflow channel, a plurality of adsorption blocks are uniformly fixed to the upper end of the jig backing plate, and the vacuum cavities and the adsorption blocks are in one-to-one correspondence. The application can be applied to various processing equipment on a PCB substrate processing production line, the number of carriers is reduced, the types of carriers are unified, the compatibility of the application to the PCB substrate is improved, and the purchase cost of the carriers is reduced.

The utility model discloses a kind of special-shaped automobile tail light plate transport tray, belong to transport tray technical field, including tray body, the transition groove and several limit slots are set in the tray body, the transition groove is through several limit slots, and is communicated with limit slot, limit slot includes several first positioning slot, second positioning slot and third positioning slot, tail light plate bottom is provided with first convex body, several second convex body and several third convex body, the first convex body is positioned in the first positioning slot, several second convex body is positioned in the second positioning slot, several third convex body is positioned in the third positioning slot.The utility model is by profiling design inside limit slot, so that two adjacent tail light plates are reversely placed in limit slot, balance the stress of the both ends of tray body, avoid that transport tray deforms, influence transportation and handling.

The application relates to the technical field of structural engineering, in particular to a mixed wind power tower anchoring conversion node and a construction method thereof. The mixed wind power tower anchoring conversion node comprises a concrete tower cylinder, a lower steel tower cylinder arranged at the top of the concrete tower cylinder, and a conversion section arranged at the top of the concrete tower cylinder. A prestressed anchoring assembly is arranged in the conversion section and comprises an anchor fixed at the outer side of the bottom of the lower steel tower cylinder and at the inner wall of the conversion section, and a connecting piece fixed at the inner side of the bottom of the lower steel tower cylinder. The anchor is designed as a J-shaped structure, the upper end of the anchor is fixed to the lower steel tower cylinder near the outer side of the cylinder wall, and the lower end of the anchor is anchored into the inner side of the cylinder wall of the conversion section through an arc path, so that force is directly transmitted from the outside to the inner wall along the path of the anchor itself without the need of a lower anchor plate, thereby eliminating stress concentration in the area of the lower anchor plate.

This utility model relates to the field of spiral scrapers, specifically a detachable scraper structure for scraper discharge centrifuges. It includes a base with a tapered shape (smaller at the top, larger at the bottom), on which a scraper assembly is detachably mounted. The scraper assembly has a limiting component, and a flange is fixedly connected to the top of the base. The scraper assembly includes several blades arranged in a circular array. Several dovetail grooves are formed on the base, also arranged in a circular array. Each dovetail groove contains a dovetail block, which is fixedly connected to its corresponding blade. The blades and dovetail blocks are integrally cast or welded together. The limiting component includes several threaded posts located above the base, arranged in a circular array, with their bottom ends fixedly connected to the top of the base. Compared to existing technologies, this patent, by designing the scraper assembly, allows personnel to individually replace worn blades according to their degree of wear.

The application relates to an electric connector, which comprises a terminal, an insulating seat and a shell, the shell wraps the side wall of the insulating seat, the insulating seat is provided with a positioning socket and a plurality of insertion holes, each insertion hole is configured with a terminal; the terminal comprises a plate body, two ends of the plate body each extend an elastic arm, the end of the elastic arm away from the plate body extends a contact welding part, the lower end of the plate body further extends a spacing arm, the two elastic arms are symmetrically arranged on one side of the plate body, the spacing arm and the elastic arm of the lower end have a U-shaped groove, the elastic arms each comprise a large bending arm and a reverse bending arm in the direction away from the plate body, the large bending arm bends forward, the reverse bending arm bends backward, and the contact welding part bends forward; one side of the lower end of the insertion hole is provided with a first sunken groove, the other side is provided with an insertion slot, and the upper end of the insertion hole is provided with a second sunken groove; the contact welding part extends into the first sunken groove or the second sunken groove, and the plate body is in plug-in fit with the insertion slot.

According to the air spring rigidity valve and the vehicle system thereof, the design of the air spring rigidity valve structure is improved, the buffering piece is provided with the body part and the abutting parts, the notch is formed between every two adjacent abutting parts, and when the air spring rigidity valve is fully opened, the abutting parts can elastically deform so as to abut against the end face of the sealing plug and / or the end socket part to achieve buffering; on the basis, the cavity on one side of the buffering piece can be communicated with the cavity on the other side of the buffering piece through the notch, it can be relatively guaranteed that stress on the two sides of the sealing plug is relatively balanced, and during electrification, the sealing plug can close the valve port part through small electromagnetic force driving.

The utility model relates to push -and -pull type folding door technical field especially uses punching device of broken bridge aluminium door and window, including support frame, still including work piece, support frame top fixedly connected with first motor, first motor output top fixedly connected with pivot, pivot periphery fixedly connected with gear, two racks are connected with gear both ends meshingly, two clamping plates are fixedly connected with two racks one end away from gear, two clamping plates symmetrical distribution work piece both sides, support frame top one end fixedly connected with second motor, the utility model discloses through setting up two clamping plates, clamp the both sides of work piece, prevent work piece from shifting in horizontal direction, lead to not accurate positioning, punching position error becomes big, and two clamping plates have absorbed the impact and vibration produced in the punching process, prevent work piece fracture or deformation, and utilize two card position keys to carry out accurate fixing in the vertical direction of work piece, realized accurate positioning work piece from multiple directions.

The application discloses an eccentricity-preventing steel plate winding and unwinding machine and belongs to the technical field of steel plate winding. The winding and unwinding machine comprises a winding roller, the winding roller is driven to rotate by external force to perform a winding action on a steel plate roll body, two limiting ring plates are arranged on the two sides of the winding roller, four supporting blocks are arranged on the two sides of the corresponding limiting ring plates, and the supporting blocks are driven to rise by external force to support the wound steel plate roll body. The application effectively solves the problem that, in the prior art, unwinding needs to be performed from one side of the winding roller, the winding roller only relies on single support of a driving structure, long-term use easily causes serious unilateral settlement due to uneven stress, and further causes eccentric force of the winding machine to fail to work normally, realizes the effect that the steel roll is supported to balance stress of the winding roller and avoid unilateral settlement, and eliminates the influence of the eccentric force on equipment operation.

A kind of auxiliary device for disassembling piston ring belongs to piston ring installation tool technical field, including the first handle and second handle of first connecting shaft rotation connection, first handle, second handle are respectively fixedly connected with one strutting arm by second connecting shaft, first handle and second handle are connected with two strutting arms by slide bar;Slide bar includes the vertical horizontal bar portion and vertical bar portion, the head of vertical bar portion is fixedly connected with horizontal bar portion, horizontal bar portion is slidably connected with two second connecting shafts, the middle part of vertical bar portion is slidably connected with first connecting shaft;Two strutting arms are slidably connected with the tail of vertical bar portion by one connecting rod.Horizontal bar portion and the sliding connection of second connecting shaft, can make the action of handle synchronous transmission to two strutting arms, reduce the intensity difference of two sides strutting arms;The sliding connection of vertical bar portion and first connecting shaft and connecting rod, further guarantee the stability of device in the process of movement, so that piston ring can realize symmetrical opening and closing.

The invention relates to the technical field of centrifugal fans, in particular to a multi-wing centrifugal fan which comprises a volute and an impeller. The volute is provided with an air outlet and two air inlets; the impeller comprises a hub disc, a hub, two reinforcing rings and two sets of blade assemblies, the hub is fixedly connected to the center of the hub disc, the two sets of blade assemblies are arranged on the two opposite side faces of the hub disc in a staggered mode, and each set of blade assembly is fixedly connected with the inner ring of one reinforcing ring; each blade assembly comprises a plurality of blades, and the blades of the two blade assemblies are the same in structure. The impeller is installed in the volute according to the preset size proportion and structure parameters. The structural design of the impeller and the volute is optimized, key size parameters are accurately matched, the positioning relation of all parts is defined, the aerodynamic performance, operation stability and assembly consistency of the fan are improved, and operation noise and abrasion are reduced.