149results about How to "Reduce scratches" patented technology

This invention relates to the field of arch breaker shell welding technology, and specifically discloses an automated welding device for arch breaker shells. A welding component is fixedly connected to the center of the top of the workbench, and positioning components are slidably connected to both sides of the top of the workbench. Placement seats are symmetrically arranged on the top of the workbench, with their bottoms slidably connected to the top of the workbench. One end of a lead screw is rotatably connected to the inner side of the workbench. This automated welding device for arch breaker shells can pre-adjust the extension position of the support frame according to the outer diameter of the flange matching different specifications of the arch breaker cylinder, so as to adapt to the flange outer diameter. When welding the cylinder and flange, the weld area continuously experiences high temperature, resulting in thermal expansion. After cooling, it contracts, which can easily cause the flange to shift axially and radially, leading to misalignment of the circumferential seam and uneven gaps. The support frame closely adheres to the edge of the flange end face, forming a circumferential limiting constraint to prevent movement during welding.

The utility model relates to the technical field of centering jigs, in particular to a mobile phone glass centering jig which comprises a positioning bottom plate, a plurality of positioning modules are installed on the top of the positioning bottom plate, each positioning module comprises an air cylinder base, and vertical first clamping arms are installed at the ends of two oppositely-arranged driving arms; vertical second clamping arms are installed at the ends of the other two oppositely-arranged driving arms, bottom supporting faces and side supporting faces are formed on the inner sides of the first clamping arms and the inner sides of the second clamping arms, and buffer structures in elastic contact with the side wall of the mobile phone glass are formed on the side supporting faces; the first clamping arm and the second clamping arm synchronously retract under the pneumatic action, the first clamping arm and the second clamping arm support the bottom face of the mobile phone glass through the bottom supporting face and make contact with the side wall of the mobile phone glass through the side supporting face, clamping and positioning are achieved, and during clamping, the buffer structure has the elastic contact effect, so that the clamping effect is good. The situation that the side faces, the top face and the bottom face of the mobile phone glass are scratched can be reduced, and the quality of the mobile phone glass is guaranteed.

The utility model relates to the technical field of floor processing, in particular to a floor surface treatment device which comprises a device shell, a connecting piece and a water receiving pipe are arranged at the top of the device shell, a preformed groove and a mounting groove are formed in the bottom of the device shell, a pressing ring is connected to the lower portion of the device shell in a sliding mode, and a plurality of inclined sliding grooves are formed in the preformed groove. A spring piece and a connecting block are connected into the sliding groove, a water supplementing piece and a plurality of cleaning pieces are installed in the installing groove, and a plurality of water seepage holes are formed in the surface of the water supplementing piece. The device is placed on the surface of a to-be-detected floor and pressed downwards, the top of a pressing ring extends into a reserved groove through pressure, at the moment, the bottoms of the cleaning pieces and the bottoms of the water supplementing pieces make contact with the surface of the floor, the linkage gear drives the multiple cleaning pieces to synchronously rotate to wipe and clean the surface of the floor, and due to the fact that the water supplementing pieces are connected with an external water source, clean water in the water supplementing pieces is squeezed out through pressure; the surface of the floor is cleaned in cooperation with rotation of the cleaning piece, the cleaning effect is improved, and meanwhile sewage splashing can be avoided through blocking of the pressing ring.

The utility model provides a kind of in-out boat structure and coating equipment, wherein the in-out boat structure includes lifting drive device, for driving at least two translation drive devices synchronous lifting movement;Translation drive device, for driving the corresponding translation movement piece of each translation drive device synchronous reciprocating translation movement;At least two boat moving assemblies, respectively installed on corresponding translation movement piece, the corresponding support paddle of at least two boat moving assemblies is respectively used to move at least two carriers boat into and out of at least two reaction cavities.The in-out boat structure provided by the utility model can move at least two carriers boat into and out of each group of at least two reaction cavities in the height direction of furnace body synchronously layer by layer, shorten the length of reaction cavity and narrow it under the premise of not reducing production capacity, shorten the cantilever length of support paddle of in-out boat structure adaptively, improve the rigidity of cantilever structure, reduce the scratching of carrier boat caused by cantilever deformation and shaking and the failure rate of coating equipment, and improve the working stability of coating equipment.

This application relates to a battery cell buffer mechanism. The battery cell buffer mechanism includes a fixing frame and support units. The fixing frame has at least one mounting portion extending along a first direction. At least one support unit is provided, with each support unit arranged in at least one row, and each support unit supports one battery cell. Each support unit includes at least two support members, each support member is mounted on a corresponding mounting portion and is movable relative to the mounting portion along the first direction, and each support member is used to make line contact with the corresponding battery cell for support. By making line contact with the battery cell through the support members, the risk of scratches, dust accumulation, and other adverse effects on the battery cell surface caused by the support units can be reduced. Furthermore, the ability of each support member to move relative to the extension direction of the mounting portion allows for adjustment of the position of the support members in each support unit, adapting the position of the support members to the size of the battery cell, thereby stably supporting each battery cell and improving the stability of battery cell support and the adaptability of the battery cell buffer mechanism.

The application relates to the technical field of picking robots, in particular to an intelligent high-efficiency picking robot, which comprises a body, a temporary storage box and a mechanical arm are respectively adaptively installed on the body, a camera and a picking mechanism are adaptively installed on the top of the mechanical arm, an outer layer pipe in the picking mechanism is adaptively sleeved with an inner layer pipe with a gap, an inner cavity is formed between the outer wall of the inner layer pipe and the inner wall of the outer layer pipe, a sliding mesh bag is adaptively installed in the inner cavity, and the mesh bag is used for grabbing and picking apples; the picking mechanism is designed as a double-layer pipe structure, the space occupied by picking is greatly reduced, picking is convenient, the picking efficiency is high, the shielding of the camera is reduced, and the picking efficiency is improved.

The utility model relates to a kind of roll bending machine plate material feeding scratch-proof surface treatment device, the utility model effectively solves that plate bottom is easily scratched, the granular matter on the surface of plate is easily formed dent when rolling, plate cannot be accurately aligned with roll bending machine entrance, is prone to the problem of indentation.The roll bending machine plate material feeding scratch-proof surface treatment device can simultaneously carry out physical cleaning to the upper and lower surfaces of plate by the upper and lower symmetrical active cleaning mechanism, effectively remove the metal scraps and dust and other impurities adsorbed on the surface, simultaneously cooperate with dust extraction mechanism can suction impurities cleaned in real time, significantly reduce the scratch or indentation risk caused by impurities pressed into by plate;Second electric push rod can coarsely adjust the height of flexible support module, flexible support module can fine tune itself, ensure that plate is smoothly fed, and flexible support module can disperse concentrated pressure into uniform surface support, prevent indentation caused by uneven support, more conducive to using when roll bending processing is carried out to plate.

The utility model relates to electric ship field, and disclose a kind of BMS mainframe structure for electric ship, including shell, the both sides of shell are equipped with positioning mechanism, the front of shell is equipped with protection mechanism, the positioning mechanism includes two locating plates, two the both sides of shell are movably installed respectively in locating plate, the top of locating plate is fixedly installed with two limit sleeves to front and rear end, and the top of locating plate is movably installed with telescopic column respectively and located in two limit sleeves, the bottom of telescopic column is fixedly installed with stud, and the top of telescopic column is fixedly installed with knob. Through locating plate and stud, the quick connection and fixation between shell and equipment are facilitated, bolt connection can be used simultaneously, and external scratching is reduced when transporting and carrying;Through fender and contraction groove, the protection of shell inside mainframe is improved, external dust is reduced to enter, and the connection of cable is facilitated.

This utility model belongs to the technical field of granite processing equipment, specifically a granite surface cleaning structure, including a cleaning seat; a pair of upright plates are fixed in the middle of the side wall of the cleaning seat; the pair of upright plates are symmetrically arranged on both sides of the cleaning seat; a liquid outlet component is provided in the middle of the side wall of one of the upright plates, which can spray cleaning liquid onto the granite surface in a rotating manner; a top plate is fixed to the top of the upright plate; an electric push rod is mounted on the top of the top plate; a movable shaft is fixed to the output end of the electric push rod; the cleaning component can rotate multiple sponges to clean the granite surface, so that the sponges cover all corners and edges of the granite surface, including hard-to-reach crevices and grooves, reducing the problem of incomplete local cleaning, and the soft sponges will not scratch the granite surface, reducing scratches or damage caused by overly hard cleaning tools, effectively removing stains without damaging the natural texture and luster of the granite.

The invention relates to the technical field of cross-linked polyethylene insulated cables, and provides a high-strength tensile-resistant mining cross-linked polyethylene insulated cable which comprises a conductor, a cross-linked polyethylene insulating layer, an inner sheath, an armor layer and an outer sheath, the cross-linked polyethylene insulating layer wraps the conductor, the armor layer is arranged outside the inner sheath, and the outer sheath is arranged outside the inner sheath. The outer sheath wraps the outer portion of the armor layer, the cable further comprises a plurality of tensile protection sleeves and tensile connecting pieces, the tensile protection sleeves are arranged outside the outer sheath and provide external protection for the cable, meanwhile, the tensile protection sleeves are provided with mechanical interlocking structures, the tensile connecting pieces are used for connecting every two adjacent tensile protection sleeves, and the tensile protection sleeves are arranged outside the outer sheath and provide external protection for the cable. And meanwhile, the tensile connecting piece located at the edge of the cable is connected with a reinforcing piece used for being connected with equipment connected with the cable. According to the technical scheme, the problem that a traditional mining cable in the prior art is poor in tensile property and protective property when facing a complex mine environment is solved.

This application relates to the technical field of veneering machines, and particularly to an anti-scratching mechanism for a veneering machine for packaging boxes, which includes a platform plate for conveying packages. A triangular guiding block is arranged at the midline position of the platform plate, and air blowing grooves are respectively arranged below both sides of the guiding block. The airflow in the air blowing grooves blows the sundries on the packaging box to both sides; a baffle plate flush with the end face of the package is further arranged at the end of the air blowing groove for guiding the sundries. In this solution, by arranging a guiding block on the platform plate and air blowing grooves below both sides of the guiding block, the airflow in the air blowing grooves blows the sundries on the platform plate to both sides, thereby cleaning the surface of the flowing packaging box on the platform plate, so as to reduce the possibility of the package being scratched subsequently.

This invention relates to the field of pipe processing technology, specifically to a machine tool with a movable bed carriage, including a frame. A core-pulling component is mounted on the surface of the frame. A lead screw assembly is located at the front of the core-pulling component. A movable carriage is mounted on the outer side of the lead screw assembly. An auxiliary bracket is provided on the surface of the lead screw assembly, and a support mechanism is provided at the front end of the movable carriage. This invention, through a novel structure of front and rear auxiliary brackets, provides better support for the pipe, solving the problem of insufficient carriage thrust and resulting minor deformation during pipe bending. This makes processing long materials simpler and faster, reducing pipe bending caused by the inherent deflection of thin-walled titanium alloy pipes. Simultaneously, the addition of a new core-pulling mechanism increases the core-pulling force while making the core-pulling distance more precise, creating a slow and uniform sliding state on the inner wall of the pipe, reducing the risk of pipe breakage and minimizing scratches in the bending area.

The invention belongs to the technical field of reinforcing steel bar straightening, and discloses a reinforcing steel bar straightening device for civil engineering construction, which comprises a fixed bracket, a driving assembly is arranged at the upper end of one side of the fixed bracket, a striking assembly is fixedly mounted on the top surface of the fixed bracket, and a connecting assembly is arranged on one side of the top surface of the fixed bracket. A straightening assembly is arranged in the middle of the top face of the fixing support, the connecting assembly comprises a rotating unit, and an abutting piece is fixedly installed at the top of the rotating unit. Through cooperation of a limiting ring, a connecting rod and other structures, a moving rod moves towards the position close to the connecting rod, a striking unit rotates, when an abutting piece does not abut against the moving rod, the striking unit continuously swings to impact a second straightening piece, a large amount of energy can be instantly released through impact, scratches and damage to the surface of a reinforcing steel bar are reduced, and the service life of the reinforcing steel bar is prolonged. And the good surface quality of the material is kept, and the effects that the material is not prone to deformation or fracture when stressed, and the fracture risk during fatigue is reduced are achieved.

The utility model discloses a pneumatic type leaf surface spraying rod, which comprises a spraying rod unit, a blade surface spraying rod unit and a blade surface spraying rod unit, the spraying rod unit comprises an upper spraying rod, a lower spraying rod, an upper nozzle and a lower nozzle, the upper nozzle is arranged on the upper spraying rod and faces upwards, and the lower nozzle is arranged on the lower spraying rod and faces downwards; the pneumatic unit comprises an air pump, an air pipe and an air nozzle, the air pump is connected with the air nozzle through the air pipe, and the air nozzle is installed around the upper nozzle and arranged to face upwards; the pneumatic unit is arranged, in the spraying process of the upper nozzle, airflow is blown upwards through the air nozzle, leaf surfaces falling downwards can be properly blown upwards, and therefore on one hand, the probability that tobacco leaves are scratched by the upper nozzle or the lower nozzle is reduced; on the other hand, the leaf surfaces are in a good spraying posture, and uniform spraying of the pesticide can be achieved.

The utility model discloses an engineering seat anti-skid wear-resistant seat surface material, which comprises an anti-skid layer, an enhancement layer, a shock absorption layer and an absorption layer, the upper surface of the anti-skid layer is provided with a bionic shark layer structure, the shock absorption layer is internally provided with a plurality of elastic pieces, the shock absorption layer is internally filled with magnetorheological fluid, the absorption layer is internally provided with a silica gel honeycomb block, and the silica gel honeycomb block is filled with a plurality of elastic pieces. A reinforcing band is arranged in the absorbing layer, and the reinforcing band is filled with polyurethane foam. According to the device, the stability of the static friction coefficient is improved by arranging the bionic shark layer structure, the surface is durable and wear-resistant, scratches and fuzzing are reduced, and by means of hexagonal elastic deformation when the silica gel honeycomb block is pressed, the viscosity of magnetorheological fluid, damping vibration of polyurethane foam in the reinforcing band through a closed-cell structure, elastic deformation of an elastic piece and deformation of an air capsule, the stability of the static friction coefficient is improved. A multi-stage damping mechanism is formed to absorb vibration, local pressure can be dispersed to the whole absorption layer, and the excellent compression resilience performance is achieved.

This utility model discloses a material suction device and a material suction system. The material suction device includes a suction pipe and a support frame. The suction pipe has a suction port and a discharge port at its two ends, respectively. The support frame is disposed on the outer wall of the suction pipe and surrounds the perimeter of the suction port. The support frame is used to open the bag opening of the material bag and form a suction space communicating with the suction port at the bag opening. At least one arc-shaped chamfer is provided at the end of the support frame away from the discharge port. A first guide slope is also provided at the end of the support frame away from the discharge port. The support frame includes a first connecting surface and a second connecting surface arranged opposite each other along the radial direction of the suction pipe. The first guide slope is connected to the first connecting surface and / or the second connecting surface by an arc-shaped chamfer. The first guide slope is inclined towards the central axis of the suction pipe from the discharge port to the suction port, thereby preventing the support frame from obstructing the suction port and improving the material conveying effect and efficiency.

The present application relates to the technical field of aluminum plate stretching, in particular to a feeding device for aluminum plate stamping and stretching, which comprises a rack, a material box arranged on the rack, and a stamping mechanism, the bottom of the material box is provided with a feeding mechanism, the two sides adjacent to the discharge port on the material box are both provided with notches, and the sides of the two notches are both provided with a material lifting mechanism; the feeding mechanism and the two material lifting mechanisms are both in transmission connection with the stamping mechanism, the remaining aluminum plates in the material box can be held by the material lifting mechanism, so that when the feeding mechanism moves the aluminum plates, a gap is generated between the bottommost aluminum plate and the adjacent aluminum plate in the material box, the possibility of scratches generated by the friction between the aluminum plates and the upper aluminum plates is reduced, the product quality is improved, and the synchronization between multiple mechanisms is improved by the transmission connection between the feeding mechanism, the two material lifting mechanisms, and the stamping mechanism, so that the device does not need to be additionally equipped with other driving sources and intermittent mechanisms, and the working efficiency of stamping is improved.

The utility model discloses a PCBA (Printed Circuit Board Assembly) test fixture in the technical field of PCBA test, and aims to solve the problems of insufficient positioning accuracy, poor adaptability, insufficient clamping stability, damage to the surface of a PCB (Printed Circuit Board) and the like in the prior art. The jig comprises a jig body, a pressing and fixing mechanism and a clamping and fixing mechanism. The top side of the tool body is provided with a test groove used for placing a PCBA. The hold-down fixing mechanism effectively absorbs vibration and impact through the combined design of an electric push rod and a hold-down air cushion in combination with a spring and a shock absorber, and it is ensured that the PCBA is kept stable in the testing process; according to the clamping and fixing mechanism, a bidirectional threaded rod is matched with a servo motor, accurate movement of a clamping rod is achieved, PCBs of different sizes and shapes are rapidly adapted, and the positioning accuracy and adaptability are improved. By optimizing the clamping and positioning structure and the damping design, the performance of the PCBA test fixture is remarkably improved, and the PCBA test fixture has the advantages of high-precision positioning, high adaptability, stable clamping, PCB protection, convenience in operation and the like.

The utility model discloses a metal material belt feeding mechanism, which relates to the technical field of middle spacer production and comprises a conveying track and a conveying driving device, a metal material belt is laid on the upper portion of the conveying track, the conveying driving device is installed on the upper portion of the conveying track, the conveying driving device can pull the metal material belt, and the conveying driving device drives the metal material belt to rotate. The metal strip feeding mechanism is arranged on the conveying rail and intermittently moves in the conveying rail at a fixed distance every time, the arranged conveying driving device, the driving traction module and the driven traction module are connected through the linkage rod, synchronous action is achieved, and the stability of a middle partition piece in the conveying process is guaranteed. By means of the design, damage caused by bending, twisting or vibration of the middle partition piece is avoided, and the product quality is guaranteed. In addition, due to the fact that the contact area between the conveying mechanism and the metal material belt (namely the material belt where the middle partition piece is located) is small and even, scratches or indentations are reduced, and the product quality is further improved.

The utility model discloses an insulation board surface scratch-proof transportation tray structure. The thermal insulation board surface scratch-proof transportation tray structure comprises a tray and a cloth liner installed on the tray. The tray comprises a bottom plate which is located at the lowermost end and plays a supporting role, a plurality of vertical rods are arranged on the bottom plate, a plurality of steering rods used for supporting the cloth liner are fixedly installed on the vertical rods, and a first rotating cylinder is rotationally installed at the upper ends of the vertical rods; the cloth liner is made of a flexible material and is used for being cushioned between the two adjacent heat preservation plates, a rotating shaft is arranged at the end of the cloth liner, and the rotating shaft is rotationally installed on the bottom plate; the extending direction of the cloth liner is changed through the steering rod. According to the thermal insulation board surface scratch-proof transportation tray structure, the effect of separating and protecting two adjacent thermal insulation boards is achieved by arranging the cloth liner, scratches and the like generated by mutual pressurization friction of the thermal insulation boards in the transportation process are reduced, and the transportation safety and condition of the thermal insulation boards are improved.

The invention relates to a coil assembly assembling device and process for a motor. The coil assembly assembling equipment for the motor comprises an assembling mechanism and a bundling mechanism arranged on the outer side of the assembling mechanism, the assembling mechanism comprises a rotating machine table, a forming assembly and a traction assembly, and the forming assembly and the traction assembly are movably arranged on the rotating machine table; after the binding mechanism binds a binding rope to a positioning end connecting point on each coil body, the rotating machine table is matched with the forming assembly to support each coil body to be positioned and formed under the traction assembly by taking the binding rope as a base point, and then the traction assembly positions and draws each coil body into the iron core by taking the binding rope as the base point; the coil assembly assembling method is based on the coil assembly assembling equipment for the motor and comprises the following steps of a winding process, a bundling process, a supporting process and an assembling process. The problems that an existing coil is low in production efficiency, poor in consistency, difficult to position and machine and prone to being scratched are solved.

The utility model discloses a kind of semiconductor polishing liquid anti-deposition devices, including the storage tank for storing semiconductor polishing liquid, the side surface of the storage tank is equipped with circulation conveying component for semiconductor polishing liquid circulation, rotating drive component is installed on the position of the storage tank and corresponding the circulation conveying component, the bottom of the storage tank is also equipped with agitating component for semiconductor polishing liquid agitation, the circulation conveying component includes fixedly connected in the bottom of the side surface of the storage tank circulation pump, conveying pipe is installed on the circulation pump, rotatable annular pipe is connected to the other end of the conveying pipe.The utility model is by circulation pump and is sent to annular pipe by conveying pipe in the storage tank polishing liquid and is evenly sprayed by spray head, positive and negative rotation motor drives driving link to make annular pipe reciprocating rotation expand spraying range, while agitating motor drives agitating blade to agitate the polishing liquid in the storage tank, ensure its uniform distribution.

This invention belongs to the technical field of quartz products, and particularly relates to a quartz ring-type product cleaning basket and its working method. A quartz ring-type product cleaning basket includes a basket body, a bottom hook, side hooks, and a position adjustment structure. The basket body is open at the top; the bottom hook is fixedly installed at the bottom of the basket body, and has multiple first positioning grooves along its length; at least two side hooks are provided, symmetrically arranged above both sides of the bottom hook, and have multiple second positioning grooves; the position adjustment structure is used to adjust the distance between the two side hooks and the distance between the side hooks and the bottom hook. This invention, by adjusting the distance between the two side hooks and the distance between the side hooks and the bottom hook through the position adjustment structure, adapts to quartz ring products of different sizes, thereby improving the versatility of this cleaning basket.

The application discloses a lens set structure and a laser processing head. The lens set structure comprises a lens barrel, a lens, a lens gasket and a locking plate. The lens is arranged in the lens barrel. The locking plate is detachably connected to the lens barrel. The lens gasket is detachably arranged in the lens barrel and connected to the locking plate. The lens gasket comprises an abutting part used for abutting the lens. The end surface of the abutting part towards the lens is an arc surface. The arc surface of the abutting part forms linear contact with the lens, which can reduce the abrasion or scratches generated on the edge of the lens.

The utility model provides a kind of building construction vibrator belongs to construction device technical field. Including equipment main body, the upper surface of equipment main body is inserted with handle, the side of equipment main body is inserted with fan, filter plate, hose and adjusting plate. The utility model through setting construction personnel holds handle, the vibration of equipment main body is conducted to vibrating rod on through hose, into the concrete in vibrating rod, start vibrating, bubble in concrete is vibrated, make the concrete that is poured more compact and dense, there is no bubble residue, when in the edge of pouring and there is shelf, by unscrewing moving bolt, make adjusting plate move to suitable position in fixed seat, make moving half ring and fixed half ring open to encase shelf, make equipment main body rotate down and be fixed on shelf, construction personnel carries out concrete vibration, reaches equipment can be suitable for the use of different environment, saves manpower and material resources, construction personnel uses more labor-saving, improves construction efficiency.

The application relates to a sample clamp suitable for epoxy resin targets of multiple sizes, comprising a base and a clamping structure; the clamping structure is arranged on the base; the clamping structure has a clamping space and a placement table arranged inside the clamping space, and the axis of the placement table coincides with the axis of the clamping space; wherein the clamping space has multiple clamping sizes to be suitable for sample targets of different sizes; the top opening of the clamping space is arranged so that the sample target to be installed can be placed on the placement table in a forward direction from the top opening of the clamping space, and the top surface of the clamped and fixed sample target is higher than the top opening of the clamping space. The application realizes clamping and fixing of epoxy resin targets of different sizes.

The invention relates to injection molding equipment and method based on waste plastic recovery, and belongs to the technical field of injection molding equipment. The equipment comprises a workbench, a pushing plunger is installed on the right side of the upper surface of the workbench, a charging barrel is fixed to the left side of the pushing plunger, heating rings are arranged on the outer side of the charging barrel at equal intervals, a metering pump is installed on the right side of the pushing plunger, and a feeding hopper is arranged at the top of the pushing plunger. According to the equipment, rotary scraping of the inner wall and vibration knocking of the outer wall of the feeding hopper are achieved through the motor, and the problems of waste plastic bridging, adhesion and blockage are effectively solved; the vertical stroke of the scraping plate can be automatically adjusted according to the weight of materials, self-adaptive scraping is achieved, the feeding stability is improved, meanwhile, the movable mold is vibrated and knocked in a reciprocating mode during mold opening, vibration auxiliary demolding is achieved in cooperation with an ejection mechanism, adhesion, deformation and damage of products are reduced, the overall structure is compact, linkage is efficient, and production efficiency is high. And the equipment operation continuity and the finished product qualification rate are remarkably improved, and the device is suitable for stable production of waste plastic recovery and injection molding.

The utility model relates to the feed production main shaft processing field especially relates to a positioning tool for feed production main shaft processing, including base, the one side fixed mounting of base top end has fixed seat, and the other side through slide rail is sequentially slid and is provided with support assembly, movable seat on base, and the adjacent surface of movable seat, fixed seat all rotates and installs three jaw chuck through bearing assembly, in the utility model, through two groups of symmetrical three jaw chuck cooperation support assembly and the setting of screw drive mechanism, servo motor, can carry out clamping processing to the main shaft of different size in a certain range for feed production, and the main shaft after clamping can carry out certain overturning and change surface processing, and in the main shaft rotating process, make the friction between main shaft and support seat become rolling friction, reduce the scratch to main shaft outer wall, protect its main shaft external surface.

The utility model discloses a protective fence, and relates to the related technical field of road and bridge protective fences of municipal engineering, the protective fence comprises supporting assemblies, a connecting assembly is arranged between the supporting assemblies, protective assemblies are symmetrically arranged on the two sides of the connecting assembly, and each supporting assembly comprises a supporting frame. A through square hole is formed in the bottom of the supporting frame, the connecting assembly comprises connecting clamping grooves, the connecting clamping grooves are formed in the outer walls of the two sides of the top of the supporting frame, and connecting side plates matched with the connecting clamping grooves are arranged on the inner walls of the connecting clamping grooves. According to the protective fence, the distance between the connecting side plates can be conveniently controlled through sliding of the extension supporting plates in the telescopic sliding grooves, extension supporting is facilitated, the length of the extension supporting plates can be conveniently fixed through fixing rotary knobs, the supporting stability is improved, scratches generated by collision are reduced through wear-resisting rubber plates, and the collision is preliminarily buffered through buffering air bags; and a damping spring is convenient for further buffering the impact, so that the protection effect is improved.