41results about How to "Guaranteed level status" patented technology

The invention relates to the technical field of unmanned aerial vehicle structure design, in particular to an unmanned aerial vehicle self-adaptive undercarriage and adjusting system. The undercarriage assembly is arranged at the end of the unmanned aerial vehicle and comprises a storage box fixed to the end of the unmanned aerial vehicle, and a servo motor and a turnover plate are arranged in the storage box; comprehensive information is provided for the control module through the sensor module, the control module accurately controls a servo motor, a driving motor and an adjusting motor through a strategy based on feedback of the sensor module, the turnover plate is controlled to move in the storage box, the turnover plate is stored in the storage box during take-off, flight resistance is reduced, the overall size is reduced during transportation, and transportation is facilitated. The height of a driving motor and supporting legs in the supporting component can be adjusted, stability is guaranteed through cooperation with a limiting structure, and an adjusting piece can enable a disc to adapt to concave-convex ground and is matched with the supporting legs to keep the horizontal state of the unmanned aerial vehicle.

The utility model relates to a steel pipe necking machine which comprises a bottom plate, a hydraulic cylinder, a fixed plate, a clamping structure and templates, the templates comprise a fixed template and a movable template, necking dies are respectively arranged on the fixed template and the movable template, the clamping structure is located between the fixed template and the movable template, and the movable template and the clamping structure are respectively connected with the bottom plate in a sliding mode. The fixed plate and the fixed template are fixedly connected with the bottom plate, the hydraulic cylinder is fixedly connected with the fixed plate, and the movable template is fixedly connected with the output end of the hydraulic cylinder. According to the steel pipe necking machine, the pipe orifice of the steel pipe is not easy to break, and the forming quality of the steel pipe after necking is improved.

The application belongs to the field of circuit breakers, and particularly relates to a conveniently-installed pole-mounted circuit breaker, which comprises a circuit breaker body, a support arranged below the circuit breaker body, a bottom plate fixedly arranged at the upper end surface of the support, a base fixedly arranged at the upper end surface of the bottom plate, a butt joint piece fixedly arranged at the lower end surface of the circuit breaker body, a trapezoidal butt joint groove arranged at the upper end surface of the base below the butt joint piece, a plurality of guide inclined surfaces arranged in cooperation with the trapezoidal butt joint groove, an arc-shaped groove arranged on the sidewall of the base at both sides of the trapezoidal butt joint groove, a clamping roller slidingly and clamped in each arc-shaped groove, and an elastic tensioning assembly arranged between the clamping roller and the butt joint piece. Through the arrangement of the clamping roller and other components, the horizontal state of the circuit breaker body during butt joint can be ensured when the butt joint piece arranged below the circuit breaker body is butt jointed with the base, and the pre-fixing of the circuit breaker body during installation is formed through the elastic limiting clamping of the arc-shaped groove and the clamping roller.

The utility model relates to pile diameter control device technical field, propose a kind of cement-soil compaction pile construction pile diameter control device, including pile driver and stake pipe, pile driver includes base, lifting mechanism is set on base, stake pipe is liftable and is set in the one side of base by lifting mechanism, lifting mechanism includes lifting head, further include connecting plate, fixed base and clamping mechanism, the one end of connecting plate is fixedly connected with the one end of lifting head, fixed base is rotationally arranged below connecting plate by adjusting mechanism, placement slot is opened in fixed base, for accommodating the one end of stake pipe, clamping mechanism is set on fixed base, for clamping fixed stake pipe, fixed base is installed with inclination sensor, clamping groove that cooperates with limiting ring is opened in stress plate. By the above technical scheme, for solving the pile diameter in prior art often due to equipment sway, perpendicularity is insufficient to lead to the deviation of pile diameter, the problem that partial diameter is too large or too small by inclined pile hole.

The utility model relates to straightening press technical field discloses straightening press suitable for soft quality steel straightening, including work table, the top of work table is provided with adjusting mechanism, the top of adjusting mechanism is provided with down -the -press subassembly, down -the -press subassembly is used for rectifying soft quality steel, the right side of work table is provided with fixed component, fixed component is used for fixed adjusting mechanism, the back of work table is provided with detection component, detection component is used for detecting soft quality steel bending degree, the bottom fixed connection of work table has support seat, the bottom of support seat is provided with horizontal component, horizontal component is used for adjusting device is in horizontal state. In the utility model, when straightening soft quality steel, rotating the rotary disc adjusts the adjusting pad block interval to adapt to the hardness of steel, the steel is put into the correction groove, the detection head is pressed into the groove to measure the bending degree, the down -the -press subassembly is pressed down, the adjusting pad block cooperation increases the deformation of the bending place, satisfies the straightening demand.

The utility model relates to the technical field of tunnel construction, in particular to a tunnel drilling deviation rectifying device which comprises a supporting disc, a rotating plate is movably connected to the interior of the supporting disc, a first connector is fixedly connected to one face of the rotating plate, a second connector is fixedly connected to the other face of the rotating plate, and an inserting rod is connected to the surface of the supporting disc in a penetrating mode. Under the connection of the rotating plate and the first connector, the horizontal rotating effect on the drill rod is achieved, it is guaranteed that a drill hole is horizontal, deviation is avoided, under the connection of the adjusting groove and the adjusting frame, the contact area of the drill rod and a tunnel face is increased through the action of the contact plate, the stable supporting performance of the inserting rod to the supporting disc is improved when the inserting rod is used in an inserted mode, and the service life of the drill rod is prolonged. And through abutting contact of the pressing block and the inserting rod, the connecting position between the inserting rod and the supporting disc is fixed, the supporting disc moves along with movement of the position of the inserting rod, and the regulation and control accuracy of the using levelness of the supporting disc is improved.

The utility model discloses a surveying and mapping device suitable for complex terrains, which comprises a leveling base, a ball head piece is embedded in the center of the leveling base, and the top of the ball head piece is fixedly connected with a supporting platform; a plurality of extension springs are arranged between the supporting platform and the leveling base, and the extension springs are symmetrically arranged relative to the center of the leveling base; the mounting platform is rotatably arranged on the supporting platform and is used for mounting a surveying instrument; the supporting legs are hinged to the leveling base, and the supporting legs are symmetrically arranged relative to the center of the leveling base; the supporting leg is of a telescopic structure, the lower end of the supporting leg is rotationally connected with an anchoring assembly, and the anchoring assembly can rotate to one side or the lower portion of the supporting leg; and first non-slip mats are arranged on the bottom surfaces of the supporting legs. The surveying instrument can meet the stability requirement of complex terrains, is easy and convenient to install and operate, and can guarantee the horizontal state of the surveying instrument in the surveying process.

The utility model provides a kind of bagged powder height adjusting device, including lifting mechanism, conveying mechanism and bottom plate, lifting mechanism is installed on bottom plate, conveying mechanism is installed on lifting mechanism, further include guiding assembly, the upper end of guiding assembly is installed at the lower end of conveying mechanism, guiding assembly includes: connecting plate, connecting plate is fixed at the lower end of conveying mechanism;Connecting rod mechanism, two connecting rod mechanisms are equipped between connecting plate and bottom plate, and connecting rod mechanism is used to keep connecting plate horizontal.The connecting rod mechanism in scheme can ensure that connecting plate is always in horizontal state, so that conveying mechanism can be kept in horizontal state, effectively avoid the distortion caused by asymmetric installation of conveying mechanism.

This utility model relates to the technical field of auxiliary equipment for steel frame welding, and discloses a support device for welding steel frames in factory expansion projects. It includes a support adjustment component, a height adjustment component, and a positioning clamping component. The support adjustment component includes a base with side plates fixedly installed on both sides. Each side plate is equipped with a level. The bottom of the support adjustment component features braked casters for quick movement and positioning. The level on the side plates, in conjunction with a threaded sleeve, a screw, and a non-slip, stable base, enables precise adjustment of the device's horizontal position. Rotating the adjustment block causes the screw to rise and fall along the threaded sleeve, adjusting the stable base to contact the ground. Combined with real-time monitoring by the level, the device is ensured to be level. A rocker arm drives a worm gear transmission, causing the threaded rod to rotate. With the guidance of a limiting slide bar and a limiting groove, the lifting plate rises and falls smoothly along the fixed plate. The height can be flexibly adjusted according to the steel frame specifications and welding requirements, reducing the frequency of steel frame position adjustments.

This utility model discloses a horizontal monitoring device for building construction, including a stabilizing frame with adjustable support legs at its lower end. A monitoring component for horizontal monitoring is installed inside the stabilizing frame, and a counterweight is installed at the lower end of the monitoring component. The monitoring component includes a connecting pipe. In this utility model, by setting up the monitoring component and using the connecting pipe in conjunction with magnetorheological fluid, the monitoring component can be leveled by its own counterweight in a natural state. Then, by controlling the operation of the electrodes, the magnetorheological fluid is solidified, ensuring that the laser emitting component remains horizontal. In this state, the laser emitting component emits laser lines, which, in conjunction with the construction workers' operations, achieve the purpose of horizontal monitoring. Simultaneously, a wireless control module can be used during construction to remotely control the operation or stop of the electrodes, achieving automated calibration without the need for repeated adjustments by the user.

This utility model discloses a lightweight hot air blower frame, specifically relating to the field of hot air blower technology. It includes a fixed plate with a mounting groove on one side. A support device is movably connected to the rear end of the fixed plate. Bolts are movably connected to one side of the mounting groove. A connecting device is fixedly connected to the upper end of the support device, and a fixed seat is movably connected to the upper end of the connecting device. A hot air blower is fixedly connected to the upper end of the fixed seat. This lightweight hot air blower frame solves the pain points of traditional hot air blowers in complex environments by upgrading flexibility, stability, and scene adaptability. It also has advantages such as safety, efficiency, and ease of maintenance. The height of the support legs can be adjusted according to the flatness of the ground or operational needs, ensuring the hot air blower remains horizontal under uneven, tilted, or other non-ideal ground conditions. The support legs can rotate at multiple angles and independently adjust the tilt angle, enhancing the equipment's fit with the ground and preventing tipping.

The utility model provides a wafer overturning structure, which relates to the technical field of semiconductor processing, and comprises an overturning platform mounting plate and an overturning assembly, the overturning assembly comprises a motor arranged on the overturning platform mounting plate, the output end of the motor is provided with a rotating plate, the bottom of the rotating plate is fixedly provided with a cantilever, the cantilever is provided with an adsorption plate, and the adsorption plate is arranged on the overturning platform mounting plate. According to the utility model, the motor drives the rotating plate to rotate and drives the cantilever and the adsorption plate to realize wafer overturning, the parallel finger cylinder pushes the cylinder clamping plate to enable the centering clamping plate to move along the direction of the wafer so as to realize centering calibration of the wafer, and the first cylinder and the second cylinder are linked to adjust the telescopic stroke of the adsorption plate so as to adapt to different wafer sizes. The vacuum chuck is connected with an air channel through an air pipe connector to generate negative pressure to adsorb the wafer, then the motor is started, constant-speed rotation is achieved through the speed reducer, the cantilever drives the wafer to complete turning over, and therefore the wafers of different sizes can be turned over in a compatible mode.

The application relates to the technical field of soil pollution treatment, and discloses soil pollution control and treatment equipment for piling engineering, which comprises a vehicle body, and a hydraulic cylinder fixed end is hingedly installed on the vehicle body. The soil pollution control and treatment equipment for piling engineering is provided with a treatment assembly, an asynchronous motor and a threaded rod, so that the moving frame can move axially; the asynchronous motor, a rotating shaft and a transmission part are used to make the drill rod rotate in the bracket to drill and pile; a medicine bucket, a water pump, an elbow and a stop electromagnetic valve are used to make the medicine enter the inside of the drill rod through a hose, the elbow, a cavity and a through hole, and then sprayed into the soil at the drilling point through the small-head-end opening of the conical cover, so that the pollutants in the soil can be degraded, converted and absorbed; the soil pollution control and treatment can be better carried out in the piling process; the rotating rod, the rotating drum and the self weight of the medicine are used to make the medicine bucket driven by the rectangular plate always keep in a vertical state, so that the medicine is prevented from leaking.

This invention relates to the field of semiconductor product testing technology and discloses a high and low temperature testing and conveying device for semiconductor products. The device includes a carrier on which a tray is placed. Several sets of lower pressure plates and upper pressure components are respectively installed on the carrier. The lower pressure plates and upper pressure components are drively connected and move in opposite directions. One set of lower pressure plates has a positive trapezoidal plate, and an inverted trapezoidal plate is also provided inside the testing chamber. The inverted trapezoidal plate cooperates with the positive trapezoidal plate to move the lower pressure plates downwards. By setting relatively movable lower pressure plates and pressure cylinders, the cooperation of the inverted and positive trapezoidal plates during carrier movement drives the automatic clamping of the tray. This forcibly corrects the unevenness of the tray top caused by long-term wear, ensuring that the tray top always remains level. This guarantees that the suction cup can accurately pick up semiconductor products from all positions within a fixed stroke, effectively avoiding missed tests due to partial tray sagging, and significantly improving the integrity and reliability of the test.

The utility model relates to the technical field of SPE (Solid Phase Extraction) purification column tubes, and provides a special SPE purification column tube for sample purification, which comprises a column barrel, a column cover, an insertion component, a first sieve plate, a second sieve plate, a limiting component, a sealing component and a discharge tube, the column barrel comprises an insertion part, a filler filling part, a sieve plate mounting part and a column cover mounting part, the inserting part, the filler filling part, the sieve plate mounting part and the column cover mounting part are of an integrated structure, the inserting part is connected with the inserting assembly, the first sieve plate is arranged in the inserting assembly, the second sieve plate is arranged on the side, close to the column cover mounting part, of the sieve plate mounting part, the column cover mounting part is connected with the column cover, and a limiting assembly is arranged on the side, away from the second sieve plate, of the column cover. According to the utility model, the structure is reasonable, the use is convenient, the use of special tools is avoided, the installation speed is improved, and a stable support can be provided for the sieve plate, so that the sieve plate is kept in a horizontal state, and the filtering effect is improved.

The utility model relates to metal cutting processing field discloses a double position rotary worktable of horizontal processing, including support base and worktable body that rotates on it, be provided with the drive arrangement of the intermittent reciprocating rotation of worktable body between the loading and unloading station and the machining station on the support base, the rotating support mechanism for guaranteeing worktable body to be in the horizontal state is arranged below worktable body at the loading and unloading station, and the rotating support mechanism includes the column fixed vertically on the horizontal reference object and the rolling body that rolls and sets on the upper end surface of column and rolls and sticks together with the lower surface of worktable body, and this worktable body cooperates the rotating support mechanism at the loading and unloading station, can avoid this side worktable body because of the impact force of product mistake down and drop, and further can ensure that worktable body located at the machining station is always in the horizontal state, guarantees the machining accuracy of product.

The invention relates to the technical field of boiler transformation construction, and discloses a boiler expansion transformation furnace top integral lifting device and a using method, the boiler expansion transformation furnace top integral lifting device comprises a boiler stand column, a boiler stand column cut-off position is arranged on the boiler stand column, and a furnace top steel beam is arranged above the boiler stand column cut-off position; portal frame supports are fixedly welded to the outer sides of the boiler stand columns located below the cut-off positions of the boiler stand columns, portal frame stand columns are fixedly connected to the upper portions of the portal frame supports, and portal frame top cross beams are fixedly connected to the top ends of the portal frame stand columns; an electric hoist is hung on a top cross beam of the portal frame, and the hoisting end of the electric hoist extends downwards and is connected with the furnace top steel beam. In the lifting process, segmented operation is carried out according to synchronous lifting reference points on portal frame stand columns, synchronous lifting and single table fine adjustment are carried out through a control box, eccentric stress is balanced, the vertical displacement deviation of overall lifting is controlled within a safety threshold value, and the horizontal state of the furnace top in the overall lifting process is maintained.

The present application relates to a kind of agricultural four-wheel drive self-adaptive chassis with adjustable stiffness damping mechanism, including vehicle body and independent suspension system;The vehicle body includes vehicle body and frame;The independent suspension system includes suspension damping device arranged in the front and rear sides of vehicle body;The suspension damping device includes suspension device and damping device;The suspension device includes parallelogram profiling mechanism;The damping device includes spring-damping shock absorber and air spring system;The air spring system includes air spring, additional air chamber, inflator, height adjustment valve and connecting pipeline;The upper end of the spring-damping shock absorber is hinged with the vehicle body, and the lower end is hinged with the first connecting rod in the parallelogram profiling mechanism.The agricultural four-wheel drive self-adaptive chassis of the present application can reduce the impact of uneven road on the vehicle body while improving the passability of agricultural unmanned vehicle, and improve the application range of agricultural unmanned vehicle.

The invention discloses a pin sample clamp for a friction testing machine, which comprises a clamp cylinder assembly, an end cap and a tension ring, the clamp cylinder assembly comprises a clamp cylinder body and a rotating body arranged in the clamp cylinder body, the rotating body is provided with a slot, a rubber ring is arranged on the slot, one end of the clamp cylinder body is provided with an external thread for connecting the end cap, and the other end of the clamp cylinder body is provided with an external thread for connecting the end cap. A cavity is formed in the outer side, close to the external thread, of the clamp cylinder body, an anti-vibration device is arranged in the cavity, the tensioning ring is arranged in the end cap, and the end cap is matched with the anti-vibration device so that the end cap can be locked in a one-way mode and is not prone to loosening. According to the invention, the problem that the clamp cylinder and the end cap which are only in threaded connection are easy to loosen when being vibrated is solved, the anti-disturbance performance of the clamp is obviously enhanced, the reliability of a fixed pin sample is improved, and the friction surface is powerfully ensured to be always in a horizontal state. According to actual requirements, the pin sample is supported, the extension length of the pin sample is flexibly adjusted, and meanwhile it is guaranteed that the load of the lifting device does not fall back.

The utility model relates to the technical field of valves, in particular to a safety valve clack grinding device which comprises a base, a three-jaw chuck installed on the base, a valve installed on the three-jaw chuck, a supporting plate installed on the valve, a positioning ring fixedly connected to the supporting plate, an eccentric grinding machine installed on the positioning ring and a grinding wheel installed on the eccentric grinding machine. A fixing assembly for supporting the eccentric grinding machine is mounted on the valve; the eccentric grinding machine is installed on the valve through the fixing assembly and the supporting plate, the eccentric grinding machine is used for grinding the valve, and due to the fact that the eccentric grinding machine is installed on the valve, even if the valve is vibrated and deviates during grinding, the eccentric grinding machine and the valve deviate synchronously, and the situation that the quality of the valve is affected due to the fact that the valve is subjected to eccentric grinding during grinding is avoided.

The utility model provides a heavy steel structure goods shelf, which belongs to the technical field of steel structure goods shelves and comprises a bottom plate, rectangular frames, reinforcing inclined rods, a top plate and adjusting plates, the rectangular frames are fixedly arranged on the left side and the right side of the upper surface of the bottom plate, the reinforcing inclined rods are fixedly arranged in the rectangular frames, and the top plate is fixedly arranged at the tops of the rectangular frames. A plurality of bolt holes are formed in the side face of the rectangular frame at equal intervals, supporting screws are in threaded connection with the bolt holes, and adjusting plates are arranged on the supporting screws at the same horizontal height. The supporting screws are connected into the bolt holes with different heights in a threaded mode, the horizontal height and the distance between the adjusting plates can be conveniently adjusted, the effect of adjusting the distance between two layers of goods shelves is achieved, goods of different sizes can be conveniently placed on the goods shelves, and the practicability of the goods shelves is improved.

The invention relates to the technical field of water conservancy construction measuring instruments, in particular to a measuring instrument for water conservancy construction design, which comprises a base body, three mounting frames are uniformly, fixedly and obliquely mounted on the base body at intervals in the circumferential direction, and a lead screw is rotatably mounted in each mounting frame; each mounting frame is provided with a driving mechanism capable of driving the corresponding lead screw, each lead screw is in threaded connection with a threaded sliding block, and each mounting frame is provided with a limiting assembly capable of limiting the corresponding threaded sliding block. Through the arrangement of the three installation frames which are evenly and obliquely installed on the base body at intervals, and the lead screws, the limiting assemblies, the threaded sliding blocks and the driving mechanisms which are arranged in the installation frames, the height of the installation base can be accurately adjusted according to requirements; the defect that the height of a traditional measuring instrument cannot be accurately adjusted due to the fact that the distance between holes is fixed is effectively overcome.

The utility model belongs to the field of steel sheet processing, and concretely is a steel sheet surface rust cleaning device, including work table, a pair of support rod is fixedly connected with work table top, support rod top is fixedly connected with support board, work table top is fixedly connected with support frame, support frame bottom is fixedly connected with electric push rod, electric push rod output is fixedly connected with first fixed seat, first fixed seat side wall is fixedly connected with motor, motor output rotatably connects with polishing shaft, work table top is fixedly connected with electric push rod, through the reverse rotation of the polishing shaft below support frame and the polishing shaft on the top of work table, the steel sheet can polish two rust marks at the same time through pushing once on the top of support board, reduces the steel sheet overturning after polishing one side to process the other side, reduces polishing time, and the electric push rod on support frame drives the polishing shaft to descend and adjusts height, can be adapted to the steel sheet of different thickness.

The utility model belongs to antenna support field especially a detachable super short wave radio station antenna support structure, it includes the central column, the outside detachable installation of central column has the positioning support, the outside fixed mounting of positioning support has four thread sleeve, the inside of four thread sleeve all is equipped with positioning mechanism, four positioning mechanisms all include sharp cone stake body, the top fixed mounting of central column has the adjusting base, the one side of adjusting base is provided with adjusting groove, the inside of adjusting groove is equipped with adjusting mechanism, the right side of adjusting mechanism is equipped with antenna installation base. The utility model can punch into the ground with sharp cone stake body, adapts to uneven or muddy ground, enhances the stability of antenna support whole, prevents toppling, and through the adjusting mechanism that sets up, when the antenna support sets up on the slope, can guarantee that antenna installation base keeps the horizontal state, avoids the antenna direction to deviate from the preset angle, has strengthened the stability and reliability of signal transceiving.

The utility model relates to material carrying and hoisting transportation technical equipment, and discloses a balance hoisting device which comprises an I-shaped mounting rod, a supporting rod, a chassis structure, a supporting structure, a hydraulic adjusting structure and a suspension arm structure, the chassis structure, the supporting structure, the hydraulic adjusting structure and the suspension arm structure are integrated into a whole, and the chassis structure achieves flexible movement and stable gravity center through an extension rod, a cross rod and rollers at the bottoms of the four corners. The symmetrically-distributed connecting rods and the auxiliary supporting rods form a triangular supporting frame, lateral torque generated by eccentric loads is counteracted, the hydraulic adjusting structure drives a suspension arm rod sleeve to rotate through a hydraulic cylinder, a hydraulic rocker and a four-connecting-rod mechanism, and precise adjustment of the lifting height and angle is achieved in cooperation with a plug pin type extending suspension arm. The lifting hook structure integrates the anti-falling pressing rod and the reset spring, materials are prevented from falling off accidentally, through a multi-fulcrum mechanical balance system, hydraulic dynamic adjustment and safety protection design, the stability, flexibility and safety in the lifting process are remarkably improved, and the material carrying requirement under the complex working condition can be met.

The utility model discloses a PVC pipe cutting auxiliary equipment, including support base plate, the top of support base plate is equipped with cutting machine, one side of support base plate top is equipped with recessed groove, the other side of support base plate top is equipped with measuring assembly, be provided with door type support board in recessed groove, be equipped with adjusting assembly on door type support board, cutting machine is located between measuring assembly and adjusting assembly, adjusting assembly includes two -way screw rod, two -way screw rod rotation is connected on the inner side wall of door type support board. The utility model discloses, through setting up pipe groove board can be used for the support PVC pipe of cutting, need not the end of the pipe of additional person to lift and can guarantee PVC pipe to keep horizontal state in the cutting process to make pipe cutout perpendicular even, through setting up measuring assembly, can set the length of need cutting in advance, when need to cut a plurality of PVC pipes in turn do not need repeatedly measure and mark cutting position, improve cutting efficiency.

The utility model belongs to the technical field of nylon wheel processing, and discloses a tool clamp of a nylon wheel, which comprises a three-jaw chuck, a connecting piece and a supporting assembly, the three-jaw chuck is used for clamping the nylon wheel, the connecting piece is used for connecting an external motor, the supporting assembly comprises a supporting piece, an elastic piece, an extrusion piece, a limiting block and a rubber strip, the supporting piece is connected to the three-jaw chuck, the elastic piece is arranged on the supporting piece, the extrusion piece is connected to the elastic piece, the extrusion piece is movably arranged on the supporting piece, the limiting block is connected to the extrusion piece, the limiting block is arranged in the supporting piece in a sliding mode, and the nylon wheel can be preliminarily positioned. The nylon wheel is ensured to be kept in a horizontal state, the nylon wheel is ensured to be kept stable when the nylon wheel is clamped by the three-jaw chuck, the effect of accurately clamping the nylon wheel is ensured, the nylon wheel can be extruded and fixed, and the stability of the nylon wheel is effectively improved.

The utility model provides a metal fitting plane positioning device, which belongs to the technical field of metal fitting processing and comprises a mounting plate, vertical plates are fixedly arranged on the left side and the right side of the upper surface of the mounting plate, a hydraulic cylinder is mounted in the center of the outer side surface of each vertical plate, a telescopic rod is mounted at the output end of each hydraulic cylinder, and a clamping plate is detachably mounted at the end part of each telescopic rod; by arranging the plane positioning assembly, when a metal accessory is positioned, firstly, the rotating plate is rotated, so that the horizontal plate on the rotating plate is located between the two clamping plates, then a workpiece needing to be clamped is placed between the two clamping plates, and the upper surface of the metal accessory is tightly attached to the bottom surface of the horizontal plate; the horizontal state of the machining face above the metal fitting is guaranteed, then the two hydraulic cylinders are started, telescopic rods on the two hydraulic cylinders extend, the two clamping plates move in the opposite directions, the two clamping plates are matched to clamp and fix the metal fitting, and the machining quality of the metal fitting is guaranteed.

The utility model relates to the technical field of instrument supporting frames, and discloses an instrument supporting frame for marine surveying and mapping, which comprises a bracket disc, and bracket supporting legs are hinged to the side edge of the bracket disc and are used for supporting after being unfolded. A vertically-through spherical sleeve is fixedly arranged in the middle of the support disc, the inner wall of the spherical sleeve is a spherical surface, a self-swinging ball body is hinged to the inner spherical surface of the spherical sleeve, and a support fixing seat used for fixing a surveying instrument is fixedly arranged at the upper end of the self-swinging ball body. After the support leg is installed on the uneven ground, the gravity swing body enables the self-swing ball to deflect relative to the spherical sleeve through the gravity effect so as to keep the swing rod perpendicular all the time, then it is guaranteed that the support fixing base and the surveying instrument installed on the support fixing base are kept in the horizontal state, and the support leg is efficient and simple.

The utility model provides a subway civil engineering foundation pit deformation measuring device, including foldable support and four measuring mechanisms, four measuring mechanisms are detachable connection in the four crosspieces bottom of foldable support respectively, measuring mechanism includes casing, scale, angle disc, pull rope and fixed plate, the upper end of casing is fixed in the crosspiece bottom of foldable support, and the upper end inboard wall of casing is assembled with two guide wheels, scale and angle disc are fixed in the casing inside respectively, and two are located below two guide wheels respectively, one end of pull rope is connected with gravity slide block in scale, and the other end is around two guide wheels and is connected with fixed plate to the offset slot of casing bottom and is downwardly penetrated, the side wall of fixed plate near foldable support extends a staff horizontally, and the casing bottom is assembled with the range finder corresponding with staff. The utility model not only can reduce detection difficulty, improve measuring efficiency, and also can be convenient to store and transport, reduce the space occupation under non - measuring state.