46 results about "Rolling sliding" patented technology

The invention relates to a method for producing a sliding bearing, in particular a planetary sliding bearing for a wind turbine, and to the related sliding bearing, planetary gear and wind turbine. The rolled sliding bearing comprises a supporting material and a sliding layer applied to the supporting material, a lubricating groove extending in the axial direction is formed in the sliding layer, and the butt joint faces of the plane supporting material are comprehensively connected in a material combination mode.

The invention relates to the technical field of crushing and screening equipment, and discloses pretreatment crushing and screening equipment for waterproof mortar manufacturing and a screening method.The pretreatment crushing and screening equipment comprises a rolling mechanism, and the rolling mechanism further comprises an equipment shell. When the pretreatment crushing and screening equipment is used, a power source of a power motor is switched on, and materials needing to be crushed are poured on the inner wall of a feeding plate; a power motor drives a driving column and a rotating disc to rotate through a driving gear, the rotating disc controls a pushing frame to generate pushing force through a pushing round block, a rolling sliding block is forced to drive a pressed block and an extrusion column to move regularly, and the rolling sliding block is matched with a pressed main block to complete the crushing procedure, the static pushing inclined plate and the pushing inclined rod go deep into the sliding rail, the inclined face of the pushing inclined plate makes contact with the driving wheel, the sliding rail is driven by the driving wheel to move upwards, when the sliding support moves upwards, the limiting plate is limited by the sliding support, the limiting plate is forced to move upwards, and the extrusion column rotates.

A kind of granulator mobile device relates to the technical field of granulator.To solve the problem that the operation space of existing granulator equipment is limited, resulting in very inconvenient maintenance.The utility model discloses a base, slide rail, transfer platform and driving device, slide rail is fixedly installed on base, specifically can be connected by the mode of welding, transfer platform is movably installed on slide rail, and the moving mode has rolling, sliding and the like, equipment body is fixedly installed on transfer platform, equipment body can be installed on transfer platform by bolt, driving device is connected with transfer platform, when needing to maintain equipment body, transfer platform and equipment body are moved from working position to maintenance position by driving device, the space of maintenance position is larger, and the maintenance of equipment body is more convenient, and the whole process does not need manual operation, reduces security risk, and maintenance efficiency is higher.

The invention discloses a rigid-body-like medical equipment earthquake vulnerability evaluation method considering multi-motion-state coupling, and aims to solve the problem that the earthquake vulnerability of wheeled medical equipment under the influence of factors such as strong shock, rolling, sliding-swinging coupling and non-uniform friction is difficult to accurately evaluate only depending on classic rigid body sliding or overturning criteria. Medical equipment is regarded as a rigid body, the motion state of the rigid body at each moment in the earthquake process is determined according to geometric parameters and supporting information of the rigid body, the gravitational acceleration and the earthquake oscillation time history, and the motion states comprise fixed foot support sliding, trundle rolling, swinging and sliding-swinging coupling. The maximum translation displacement and the maximum rotation angle of the rigid body are obtained based on the motion state, the damage state of the rigid body is judged according to the maximum translation displacement and the maximum rotation angle, nonlinear incremental dynamic analysis is conducted on the rigid body, an earthquake vulnerability function is obtained, the larger the median value of the earthquake vulnerability function is, the lower the earthquake vulnerability of the rigid body is, and otherwise, the higher the earthquake vulnerability of the rigid body is. The invention belongs to the field of shock resistance of medical instruments.

The utility model relates to the technical field of cold rolling sliding sleeves, in particular to a compression resistance detection device for a cold rolling sliding sleeve, which comprises a detection support, a door-shaped support frame arranged on the detection support, a pressure supply module arranged above the door-shaped support frame, and a compression resistance support limiting device arranged below the pressure supply module. The compression-resistant supporting and limiting device comprises a first L-shaped supporting frame and a second L-shaped supporting frame which is symmetrical to the first L-shaped supporting frame. According to the device for detecting the compression resistance of the cold-rolled sliding sleeve, during detection, the two ends of the sliding sleeve are limited, so that the operation safety is improved.

The utility model provides a double-layer feeding and emptying slideway structure which is based on an integrally welded double-layer main body frame and comprises a top layer rolling slideway which is obliquely arranged and a lower part bearing slideway which is horizontally arranged, and the top layer rolling slideway and the lower part bearing slideway are distributed up and down; the top-layer rolling slide way is used for bearing a sliding plate on which materials are placed, and moves from the feeding end to the material taking end to convey the materials; the lower bearing slide way bears the empty slide plate and moves from the material taking end to the feeding end to convey the empty slide plate; a baffle is arranged at the position, close to the material taking end, of the top-layer rolling sliding way. The gap of the top rolling slide way and the lower bearing slide way at the material taking end forms an empty plate return opening, and after materials are taken away from the baffle, the empty slide plate obliquely slides to the lower bearing slide way from the empty plate return opening. The top layer rolling slide way is combined with the lower bearing slide way, feeding and empty returning are achieved, the number of the upper layer rollers is reduced, the sliding plate does not need to be taken and placed repeatedly, the structure is simple, and operation is convenient.

The utility model provides a screen residue treatment device for a drum screen, which relates to the technical field of drum screens and comprises a base, roller screen components arranged on opposite sides of two U-shaped support rods, two crushing components arranged in an inner cavity of a feed bin, and cleaning devices arranged at one ends of the opposite sides of the two U-shaped support rods. According to the material crushing device, the crushing motor operates and performs rotary crushing on some large-size materials in the fed materials, and the motor operates and enables the drum screen to rotate, so that the crushed materials are subjected to roller screen treatment, and qualified materials can be screened out through a plurality of screen holes and fall into the collecting box; the materials which are not screened out slide into a collecting container placed at the bottom through the inner side of a U-shaped discharging plate under the rolling effect of the rotary screen, a forward and reverse motor operates to drive a threaded rod to rotate in the forward direction and the reverse direction, and therefore a plurality of brushes installed on the inner side of a U-shaped installation plate are used for cleaning remaining materials accumulated in a plurality of screen holes.

The utility model relates to the production technical field of sliding sleeve, especially in production of cold rolling sliding sleeve cutting device, including cutting support, fixed with a sliding limit pole group in cutting support, the first cutting adjusting device, second cutting adjusting device are equipped with on the sliding limit pole group sliding, the first cutting adjusting device includes first support frame, and first support frame sliding card is equipped in the sliding limit pole group, is equipped with first adjusting oil cylinder vertically upwards in first support frame, is equipped with first support vertical board with the fixed piston rod of first adjusting oil cylinder, and first support vertical board sliding card is equipped in the inside of first support frame, is equipped with first cutting oil cylinder horizontally on first support vertical board, is equipped with first mounting bracket with the fixed piston rod of first cutting oil cylinder, the cutting device for production of cold rolling sliding sleeve of the utility model has higher applicability, and the cutting of different size materials can be realized.

This invention relates to a sliding block type universal joint shaft lubrication device. The lubrication device includes a drive shaft, copper sliding blocks, a flat head sleeve, and a joint sleeve. Two copper sliding blocks are connected and mounted on the drive shaft by sliding block pins. One end of the joint sleeve is integrally fitted onto the outer circumference of the drive shaft, and the other end is fitted onto the outer circumference of the flat head sleeve. One end of the flat head sleeve is fitted onto the roll journal, and the other end is inserted between the two copper sliding blocks. This technical solution is suitable for bearing lubrication of hot-rolled sliding block type universal drive shafts. The bearing pair uses a thin oil bath lubrication with cooling effect, and it eliminates the need for a flat head sleeve clamping device, requires no manual intervention during roll changing, and ensures that it does not affect the loading and unloading of rolls. This solution mainly achieves functions such as oil storage, oil carrying, oil spraying, sealing, universal swing, locking, and synchronization.

The utility model relates to anti -reel device field discloses a high -temperature protection film production is with anti -reel device, including support frame, auxiliary support subassembly, controller, servo motor, protection shell, anti -reel subassembly, roll and bearing support, anti -reel subassembly and bearing support one side end face middle part fixedly connected with convenient replacement mechanism. In the utility model, the device places roll one end on the auxiliary support mechanism, adjusts the height and moves the roll, makes the insertion block to insert the interface of the connecting portion, rotates the knob and drives the snap ring on the clamping rod to rotate, until the snap ring penetrates the interface side end face and is clamped with the insertion block, and the snap block pops out the movable slot under the action of the spring simultaneously, and the clamping rod moves to prevent the snap ring from reversing. The clamping plate of the other end of the roll slides along the limiting block in the fixed part sliding groove, and after reaching the position, the fixing bolt is tightened, so that it penetrates the clamping plate and is screw thread connection with the limiting block, realizes the quick disassembly of the roll, and improves the practicality.

The utility model relates to a material receiving trolley of a laser plane cutting machine, which relates to the field of material receiving devices, and comprises a trolley main body and bottom rollers for the trolley main body to roll and slide, a through hole is formed in the bottom face of the material receiving cavity of the trolley body in a penetrating mode, a mounting cover covering the through hole is arranged above the through hole, the mounting cover is provided with a mounting cavity with an opening in the lower end, and the bottom idler wheels penetrate through the through hole to the mounting cavity and are connected to the mounting cover. The trolley main body is slidably provided with a meshing push rod which is meshed with the rotating teeth and is used for driving the bottom rollers to steer; the meshing push rod penetrates through the mounting cover. The bottom idler wheels are installed in an embedded mode, only one part of each bottom idler wheel extends out of the bottom of the trolley body to be used for rolling, the space can be fully utilized under the condition that the overall height of the trolley body is not changed, a large-volume material receiving cavity is formed to be used for receiving materials, and the material receiving efficiency is high.

The application provides a submerged roller sliding bearing zinc residue cleaning device, which comprises an arm frame body, at least two roller supporting mechanisms, a moving mechanism and a cleaning mechanism, wherein the submerged roller is rotatably connected to the arm frame body through a sliding bearing; the at least two roller supporting mechanisms are oppositely arranged on the arm frame at intervals, and each roller supporting mechanism has a supporting part which can rotate towards the side of the submerged roller; the device is used for supporting the submerged roller through the rotation of the supporting part, moving the movable part to make the cleaning part extend into the gap of the sliding bearing, and rotating along the circumferential direction of the submerged roller to clean the zinc residue and other impurities in the sliding bearing of the submerged roller, so that the cleaning efficiency is effectively improved; the roller supporting mechanism can stably support the submerged roller during the cleaning process, so that shaking or deviation is avoided, the accuracy and safety of the cleaning are ensured, the wear and damage of the submerged roller and the sliding bearing are reduced, and the cleaning effect of the sliding bearing of the submerged roller is improved.

The application provides a profile conveying online fixed-length cutting device based on laser induction and a control method thereof, and belongs to the technical field of profile processing. The device comprises a rack, a conveying mechanism, a laser sensor, a cutting execution mechanism, a cutter retracting and releasing mechanism and an angle adjusting mechanism. The sliding seat is installed on the guide rail through rolling sliding blocks, and a vibration isolation pad is arranged between the guide rail and the rack. The cutter retracting and releasing mechanism drives the cutting tool to switch between the cutting position and the retracted position. The angle adjusting mechanism adjusts the cutting angle. The method comprises the following steps: electronically setting the cutting length, pre-accelerating the sliding seat to be synchronized with the conveying, keeping synchronization after the first laser triggering, triggering the cutting in advance by the controller, returning the sliding seat after cutting and self-adaptingly correcting the position deviation. The application solves the problems that the special-shaped cross-section profile cannot be cut off in one pass, dynamic matching is difficult and vibration conduction leads to precision deterioration.

This invention discloses a variable contact rolling-sliding composite bearing and its design method, relating to the field of bearing technology. The bearing includes an outer ring, an inner ring, bearing rollers, and a cage. The diameter of the bearing rollers is larger than the axial height of the cage to form an initial clearance. When the external load is small, the bearing rollers bear the load alone, and the bearing is in a pure rolling contact state. When the external load increases to the point that the bearing rollers undergo elastic deformation and the initial clearance closes, the end face of the cage contacts the raceway surface of the outer ring, sharing the load with the bearing rollers, and the bearing switches to a rolling-sliding composite contact state. The design method involves: calculating the roller deformation to determine the critical load; establishing a spring stiffness model for the rollers and cage to solve for the load distribution; checking whether the cage contact stress is lower than the yield limit; if it exceeds the limit, increasing the initial clearance and iteratively optimizing. This invention achieves adaptive switching of the bearing's operating mode, enabling low friction under light loads and high load capacity under heavy loads, and the design method is universal and reliable.

This disclosure relates to a floating solar installation (1), comprising: - floats (11) providing buoyancy to the installation, - at least one row (R1, R2) of photovoltaic panels and a trolley system configured for the maintenance of the photovoltaic (PV) panels, comprising: - maintenance rails (12, 13, 14) - at least one maintenance trolley (2) comprising a chassis (20) provided with first rolling / sliding members and second rolling / sliding members configured respectively to travel while guided by the two rails, and wherein the trolley is configured to be moved along the rails, the chassis configured to pass astride, over the photovoltaic panels of said at least one row (R1, R2). Abstract figure: Figure 1 *

The utility model discloses a kind of gantry machining center crossbeam assemblies, including support beam, receiving plate and hoisting piece, the both ends of support beam are fixedly installed in the column of gantry machining center, hoisting piece is hollowed out inside and is formed into the surrounding ring piece that can be set in the outside of support beam, support beam includes fixed support and the receiving beam installed in the upper portion of fixed support, receiving beam has the placing groove that goes out to upper portion, multiple buffer springs are arranged in placing groove, receiving plate is installed in placing groove and is supported by buffer spring, multiple ball grooves are arranged on the upper surface of receiving plate, one rolling slide ball is provided in each ball groove, rolling slide ball partially exposes ball groove, the side of surrounding ring piece upper plate towards receiving plate is provided with cooperation block, cooperation block lower end has the inner groove that can just contact with rolling slide ball, cooperation block bottom has the setting cavity that goes out downwards, contact spilling piece is provided in setting cavity.

The utility model relates to a large motor rotor magnet yoke groove repairing device which is of a main shaft box side hanging type structure, two linear guide rails are arranged on a stand column, and a power milling head device moves up and down on the guide rails of the stand column and is a Y-axis stroke. The stand column and the base are connected and fixed through bolts, four rolling sliding block bearings are installed at the bottom of the stand column base and move on the arc THK guide rail to form an X-axis stroke, a machine tool moves around the motor rotor along the arc THK guide rail, and repairing machining of the whole motor rotor magnet yoke is completed. The power milling head device is transversely adjustable, and the milling head main shaft rotates left and right on the milling head seat in the horizontal plane, so that the tool setting adjustment of the formed milling cutter on the magnet yoke groove is realized, the movement of the tool in the X, Y and Z coordinate axis directions is realized, and the cutting requirements of different positions and angles are met.

The embodiment of the utility model provides a sliding and rolling display device which comprises a sliding and rolling device and a flexible display module, the sliding and rolling device is used for assisting the flexible display module in sliding rolling and unfolding, the flexible display module comprises a flexible display panel and a flexible circuit board, and the flexible display panel comprises a first end and a second end; the sliding and rolling device comprises a housing used for supporting a non-rolling and non-sliding part of the flexible display panel; the sliding rail is arranged on the side, away from the flexible display module, of the machine shell, and the machine shell is in sliding connection with the sliding rail; the first supporting structure is in sliding connection with the sliding rail, is connected with the side, away from the first end of the flexible display panel, of the machine shell and is used for supporting the rolling and sliding part of the flexible display panel; the second supporting structure is connected to the side, close to the second end of the flexible display panel, of the first supporting structure, is slidably connected to the sliding rail and is used for supporting and fixing the flexible circuit board, and the risk that the flexible circuit board scrapes a rear shell of the display device due to warping in the moving process of the sliding and rolling device can be reduced.

A roller bearing includes inner and outer rings each having a raceway, an annular space between the raceways, and a plurality of rolling elements and a lubricating grease in the annular space. The raceways have a predetermined roughness value within a first predetermined range, and the lubricating grease contains graphene particles uniformly dispersed in a suspension in the lubricating grease. The graphene particles have an at least substantially circular shape, a diameter within a second predetermined range and a thickness within a third predetermined range. An amount of the lubricating grease in the annular space and the first, second and third predetermined ranges are selected such that a self-regenerating mat of graphene that at least partially coats the raceways will develop in use as a result of a relative rotation between the inner and outer rings and the rolling / sliding of the rolling elements on the raceways.

The utility model discloses a guide shoe, a lift car device and an elevator. The guide shoe comprises a mounting seat, a first roller, a second roller and a sliding guide piece, wherein the first roller, the second roller and the sliding guide piece are mounted on the mounting seat; the axis of the first roller is perpendicular to the axis of the second roller, and the sliding face of the sliding guide piece is arranged to be opposite to the circumferential face of the first roller so that the first roller can roll in cooperation with the side guide face on one side of the guide rail, and the sliding face of the sliding guide piece can slide in cooperation with the side guide face on the other side of the guide rail. The second roller is matched with the middle guide surface of the guide rail for rolling. According to the scheme, the running speed of the large-load elevator can be increased, and unbalance loading of the large-load elevator can be prevented.

The invention provides a target electric three-dimensional adjusting device and method for optical camera imaging, and relates to the technical field of automatic production and assembly of space remote sensing cameras, the adjusting device comprises a mounting base, an axial power unit, a movable sliding disc, a position feedback unit, a rolling power unit, a rolling sliding ring, a third gear, a fifth gear, a sixth gear and a target, the axial power unit drives the movable sliding disc to achieve axial movement adjustment, the position feedback unit can conduct position feedback, the rolling power unit drives the rolling sliding ring to achieve rolling movement adjustment, the sixth gear drives the first target and the second target to rotate to achieve switching action, the structure is compact, the integration degree is high, and occupied space is small. According to the target adjusting mechanism, the functions of position translation in the optical axis direction, rolling around the optical axis and switching of the target can be achieved, and the technical problems that an existing target adjusting mechanism does not have the position feedback function, target rolling adjusting and switching functions cannot be achieved, and the space size is large are solved.

The utility model discloses a novel fish catching mechanism, which relates to the field of fishing and comprises an X-axis moving structure, a Y-axis moving structure, a Z-axis moving structure and a fish catching structure, the Y-axis moving structure is fixed at the bottom end of the X-axis moving structure, the Z-axis moving structure is fixed at the bottom end of the Y-axis moving structure, and the fish catching structure is fixed at the front end of the Z-axis moving structure. The X-axis moving structure comprises an X-axis base, an X-axis motor, an X-axis synchronous wheel, an X-axis synchronous belt, an X-axis aluminum sliding rail and an X-axis sliding block, the novel fish fishing mechanism can move in the X direction, the Y direction and the Z direction, and the X-axis moving structure, the Y-axis moving structure and the Z-axis moving structure of the novel fish fishing mechanism are each composed of an inner sliding rail and an outer sliding rail. Rolling sliding is carried out through precise matching of the inner and outer protruding parts and the groove part of the grooved wheel, so that rotation of the motor is converted into linear motion of the sliding block, and multi-angle control adjustment of the fish fishing structure is achieved.

The utility model discloses a Velcro winding machine which comprises a working table, a winding vertical plate is vertically installed on the working table, a winding roller is rotatably installed on the front face of the winding vertical plate, a winding drum is arranged on the winding roller in a sleeved mode, a Velcro roll is arranged on the winding drum, containing grooves are formed in the two sides of the winding roller, discharging push plates are arranged in the containing grooves, and the discharging push plates are arranged on the working table. The discharging push plate is connected with a discharging air cylinder, a discharging plate is arranged below the winding roller, a connecting block is arranged at the bottom of the discharging plate, the connecting block is connected with a rotating shaft, the rotating shaft is connected with a rotating mechanism, an overturning bottom plate is arranged on the side, away from the winding roller, of the discharging plate, and a material receiving table is arranged below the side, away from the winding vertical plate, of the overturning bottom plate. The discharging push plate is arranged on the winding vertical plate, after winding is completed, the discharging push plate pushes the hook-and-loop fastener roll out of the winding shaft to enable the hook-and-loop fastener roll to fall onto the discharging plate, then the discharging plate is turned over, the hook-and-loop fastener roll slides onto a receiving table from the turning bottom plate, and automatic discharging is completed.

The utility model relates to the technical field of blanking deviation rectification, and discloses an anti-blanking deviation rectification device which comprises a main frame, installation adjusting mechanisms, a rotary deviation rectification mechanism, an anti-blanking mechanism and a real-time sensing mechanism, the installation adjusting mechanisms are arranged on the two sides of the main frame, the rotary deviation rectification mechanism is rotationally arranged at the top end of the main frame, and the anti-blanking mechanism is arranged on the main frame. And the anti-falling mechanism is arranged on the rotary deviation rectifying mechanism. By means of the design of the telescopic frame, the belt conveyor can flexibly adapt to belt racks of different sizes; the mounting holes are matched with the adjusting holes, so that the height of the device is adjustable, and the device adapts to various rack specifications; the detection driving wheel assembly monitors the position of the belt in real time, the angle of the rotating frame is adjusted through the telescopic hydraulic cylinder, belt deviation correction is achieved, and belt deviation is effectively coped with; in case of serious deviation, the anti-roller is triggered to slide, and the deviation side bracket is fixed; a photoelectric sensor detects approaching of a detection driving wheel, a gathering hydraulic device is started, the belt groove angle is adjusted, and materials are prevented from scattering; and belt deviation is accurately controlled, and materials are prevented from being thrown off.

The invention discloses a low-friction ocean bundling pipe centralizer based on rolling elements, which comprises a centralizer main body arranged between an inner pipe and an outer sleeve of an ocean bundling pipe, the outer ring of the centralizer main body is uniformly provided with a plurality of rolling piece grooves along the circumferential direction, and each rolling piece groove is internally provided with a rolling element. The rolling elements are arranged in the outer sleeve and make close contact with the inner side of the outer sleeve, the multiple rolling elements jointly form a bearing set, the bearing set is arranged in a combined mode of axial rolling, annular rolling and sliding, the axial rolling is used for bearing and releasing axial loads, and the inner pipe is allowed to generate relative displacement in the axial direction of the inner pipe. The annular rotation is used for bearing an annular load, and the inner pipe is allowed to annularly deflect relative to the outer sleeve. By means of the innovative low-friction rolling supporting design, an efficient and reliable solution is provided for solving the problems of stress release and abrasion of the deep-sea bundled pipeline, and important engineering application value is achieved for promoting development of ocean oil and gas resources to deeper and farther sea areas.

The utility model discloses a wire rod rough and intermediate rolling sliding inlet guide and guard device, which belongs to the technical field of iron and steel smelting, and comprises a guide and guard base and a guide and guard upper cover which are oppositely spliced, a rolling channel for wire rods to penetrate through is enclosed between the guide and guard base and the guide and guard upper cover, a clamping groove is arranged on the splicing end face of the guide and guard upper cover, and the clamping groove is connected with the guide and guard base. A clamping block is arranged on the splicing end face of the guide and guard base, and the clamping block and the clamping groove are arranged in a matched mode. Connecting parts are oppositely arranged on the side walls of the guide and guard base and the guide and guard upper cover, and the connecting part of the guide and guard base is connected with the connecting part of the guide and guard upper cover through a fastener. According to the utility model, connection looseness and even fracture caused by factors such as irregular stress, high temperature and thermal alternating impact in the production and operation process can be prevented, the service life of the guide is greatly prolonged, and production accidents are reduced.

The invention discloses a steel rail anti-scratch performance experiment method, and relates to the technical field of steel rail performance testing, and the method comprises the following steps: preparing a steel rail sample: processing a steel rail to be tested into a cylinder with the diameter of 40-80mm and the length of 100-200mm, and the surface roughness Ra is less than or equal to 1.6 [mu] m; clamping the sample: fixing the sample through a hydraulic locking clamp, and adjusting the contact angle between the loading system and the sample to 90 degrees; setting experimental parameters: the loading force is 500-2500N, the rotating speed is 200-400rpm, and the slip ratio is 1%-5%; starting dynamic loading: continuously operating for 4-12 hours, and monitoring friction temperature, vibration spectrum and load fluctuation in real time; the weight loss ratio is measured, the scratch resistance grade is evaluated in combination with the hardness gradient and the SEM microstructure, operation is convenient, rolling-sliding contact periodic loads of the steel rail in the processes of starting, accelerating, braking and the like between the railway wheel and the steel rail can be simulated, and accurate evaluation of the scratch resistance of the steel rail is achieved.

The utility model discloses a printing machine feeding device relates to printing equipment technical field, aims at solving the problem that when replacing printing paper roll, the printing paper roll is lifted by staff, the printing paper roll is influenced by paper weight, causes staff to lift the printing paper roll, and the problem of needing to spend great effort, influence work efficiency. Its technical scheme main points are: including device body, the support frame is fixedly connected with device body lateral wall, and the support frame lateral wall is opened with the sliding slot, and the moving block is slidably connected in the sliding slot, and the slide rail that printing paper roll slides is fixedly connected with the side away from device body of support frame. The utility model electric push rod and the cooperation of lifting assembly, realize the effect that printing paper roll with paper is lifted upwards automatically in this way, reduce the effort that staff replaces printing paper roll, improve work efficiency.