507 results about "Rolleron" patented technology

The invention discloses a conveying device for detecting the protruding height of an oil injector, and relates to the technical field of oil injector detection. Wherein the conveying piece comprises a rolling shaft and an anti-skid sleeve which are connected in a sleeved mode, the roughness of the surfaces of the rolling shaft and the anti-skid sleeve is different, and the rolling shaft is driven by a motor to rotate. According to the conveying device for detecting the protruding height of the oil sprayer, the rolling shaft and the anti-skid sleeve which are connected in a sleeving mode are adopted, the roughness of the surface of the anti-skid sleeve is increased, and therefore the roughness of the device is changed according to needs, and the problem that when an existing conveying device for detecting the oil sprayer is used, the height of the oil sprayer is too large is effectively solved. The technical problem that the roughness of the conveying belt cannot be freely adjusted according to needs is solved, the purpose of freely adjusting the surface roughness of the conveying device is achieved, the surface roughness of the conveying device can be adjusted according to the machining condition of the air cylinder cover, various machining requirements are met, and the applicability of the device is improved.

The invention relates to a stroke-sectioned adjustable variable-damping inflatable hydraulic multi-damping device, and belongs to the technical field of vibration control. Comprising a roll shaft support assembly, a working cylinder assembly, a spring damping assembly and a piston mechanism assembly. The working cylinder assembly is mainly composed of a connecting pull ring, a main liquid storage cylinder, a limiting device, tightness adjusting threads, a piston rod connecting position, an auxiliary liquid storage cylinder and an air storage cylinder. The spring damping assembly is mainly composed of an adjusting spinning roller, a damping spring, a spinning roller damping gasket and a spring damping gasket. The piston mechanism assembly is composed of a piston rod and driving pistons on the two sides. The roller shaft support assembly is composed of a roller shaft fixing support and a pin. Through mechanism linkage of the liquid storage cylinder and the air storage cylinder, the inflatable hydraulic damping device is formed, and the purposes of damping changing and vibration reduction are achieved. The shock resistance and the transmission efficiency of a vibration reduction system can be improved, the energy consumption effect, the structural rigidity and the stability are enhanced, and the advantages of being simple in structure, convenient to implement and the like are achieved.

The utility model discloses a tote cart which relates to the technical field of manual vehicles and comprises a frame body, a handle is fixedly arranged on the side edge of the frame body, a plurality of rolling shafts are arranged at the bottom of the frame body in a rotating mode, a center shaft is fixedly arranged in the rolling shafts in a penetrating mode, and the two ends of the center shaft extend out of the two sides of the frame body respectively. Locking assemblies are symmetrically arranged on the two sides of the frame body and used for locking the center shaft. Each locking assembly comprises a limiting plate, a rotating shaft and a connecting rod. The rotating shafts are rotationally connected with the side edges of the frame body, the limiting plates are fixedly connected with the rotating shafts, the connecting rods are fixedly connected with the limiting plates, a pair of check blocks is fixedly arranged on the frame body, springs are fixedly installed between the check blocks and the connecting rods, and limiting grooves matched with the center shaft are formed in the limiting plates. The problem that in the prior art, a roller is arranged at the bottom to support and guide carried objects, and the stability of the carried objects in the conveying process is not facilitated is solved.

The invention relates to the technical field of bearings, in particular to a universal joint bearing capable of improving the sealing effect, which comprises a connecting shaft body, a shaft rod arranged on the connecting shaft body, a shaft sleeve arranged on the shaft rod in a sleeving manner and a plurality of rolling shafts arranged on the shaft sleeve, and the plurality of rolling shafts are in rolling contact with the outer side surface of the shaft rod. The shaft oil seal is arranged on the peripheral side of the shaft rod and is positioned below the shaft sleeve; the sleeve oil seal is arranged on the inner peripheral side of the lower end of the shaft sleeve; the upper sealing lip is arranged on the shaft oil seal; the side sealing lip is arranged on the peripheral side of the shaft oil seal; the sleeve sealing lip is arranged at the upper end of the sleeve oil seal, the sleeve oil seal is located above the shaft oil seal, and the sleeve sealing lip is an elastic ring.

The utility model relates to a roller press, in particular to a roller press for preparing a wave absorbing plate, which comprises a roller press frame, a driving motor, a conveying belt, a roller press component, a transmission component and the like. Two rolling shafts are arranged on the rolling rack, a conveying belt is connected to the rolling shafts, a driving motor is installed at the left end of the rolling rack and connected with one of the rolling shafts through a coupler, and a rolling assembly is arranged at the top of the rolling rack and located in the middle of the rolling rack. An output shaft of the driving motor is connected with the rolling assembly through a belt, and a conveying assembly is arranged on the right portion of the rolling rack. The conveying belt is driven by the driving motor to continuously convey the wave-absorbing plate, the wave-absorbing plate is fully pressed in cooperation with the synchronously-driven roller, the wave-absorbing plate is limited through the limiting plate and the first baffle in the conveying process, deviation of the wave-absorbing plate in the conveying process is prevented, and therefore the effect that the wave-absorbing plate is efficiently rolled and prepared is achieved.

The geomembrane unfolding device comprises a bottom frame, a first supporting column is arranged above the rear end of the bottom frame, the top of the first supporting column is connected with a U-shaped supporting block, and a rolling shaft is movably arranged in an inner cavity of the U-shaped supporting block; the feeding rollers and the rubber sleeve are used in cooperation, the geomembrane is clamped between the two feeding rollers, when the geomembrane is cut off, the cut-off position of the geomembrane cannot be thrown away, the use safety is high, due to the arrangement of the rubber sleeve, the rotation damping of the rolling shaft is increased, and when the first motor stops working, the rolling shaft cannot rotate, so that the service life of the geomembrane is prolonged, and the service life of the geomembrane is prolonged. And the rotation amplitude of the rolling shaft influenced by inertia can be reduced, so that the situation that the geomembrane is scattered after the equipment is stopped is avoided, and the overall practicability is improved.

The invention discloses a roller pin movement rotating transmission mechanism, and particularly relates to the technical field of engineering transmission, which comprises a shell, a motor, a groove strip, a controller and a self-repairing transmission assembly, the self-repairing transmission assembly comprises a linkage column, a groove ring, a plurality of rolling shafts, a linkage strip, a main concave strip, a main roller pin, an auxiliary concave strip, an auxiliary roller pin, a positioning sleeve and a rotating shaft. By means of the self-repairing transmission assembly, self-repairing operation can be rapidly conducted on the positions of the main roller pin and the main contact ring which are abraded, in this way, the auxiliary roller pin and the auxiliary contact ring can be in self-repairing contact, and the rotary transmission mechanism is suitable for the fields with high precision and strict requirements for transmission continuity and service life; therefore, the problems that shutdown disassembly and maintenance are needed in the later maintenance period, the maintenance interval is long, the maintenance cost is high, and the device is difficult to adapt to the technical field with strict requirements for high precision, transmission continuity and service life are solved.

The disclosure belongs to the field of gates and discloses a retractable baby gate. The retractable baby gate includes at least a piece of gate fabric; a roller, mounted on one side of the gate fabric, wherein a rolling shaft is coaxially arranged in the roller, one end of the gate fabric is fixed to the rolling shaft and winds the periphery of the rolling shaft, a longitudinal opening through which the gate fabric comes in and goes out is formed in the peripheral surface of the roller, a shell is fixedly connected to the upper end of the roller, and a base fixedly connected to a mounting fixed surface is connected to the lower end of the shell; and a control portion, arranged in the shell to control rotation and locking of the rolling shaft, wherein the control portion includes a gear coaxially connected to the rolling shaft.

An omniwheel 100 comprising a central hub 150 from which extends a plurality of radially extending spokes 110, each spoke 110 terminating with an outer radial head 112, each pair of adjacent radial heads radially spaced from the central hub 150 have extending therebetween a roller axle for supporting a roller 104 adapted to rotate about an axis 105 perpendicular to a virtual radial line 124 extending from a main axis 108 of rotation of the wheel 104, wherein the outer periphery of the central hub 150 includes a cylindrical outer wall 156 supporting for each radial head a pair of radially outwardly extending spoke arms 146 defining therebetween a triangular, diamond or arrow-head shaped hollow 142, the pair of outwardly extending spoke arms 146 converging to meet to form a spoke neck portion 134 that supports the corresponding radial head 112.

The utility model provides an automatic discharging device of a slitting machine, which relates to the technical field of slitting machines and comprises a base, two grooves are formed in the top of the base, a first mounting frame and a second mounting frame are respectively arranged in the two grooves, a first rolling shaft is movably mounted at the top of the first mounting frame, and a second rolling shaft is movably mounted at the bottom of the second mounting frame. A second rolling shaft is movably mounted at the top of the second mounting frame, a driving motor is fixedly mounted on one side of the outer wall of the base, a hydraulic oil cylinder is fixedly mounted at the top of the base, when the driving motor is started to drive the two-way screw to rotate, the connecting block is in butt joint with the interior of the clamping groove, and otherwise, the driving motor drives the two-way screw to rotate reversely; the first rolling shaft and the second rolling shaft can be separated by rotating the first mounting frame, the first rolling shaft and the second rolling shaft can be conveniently mounted and dismounted, when the first mounting frame drives the first rolling shaft to move, the push plate can push the steel coil from the surface of the first rolling shaft into the collecting box, and the steel coil materials collected on the surfaces of the first rolling shaft and the second rolling shaft can be conveniently and automatically discharged.

The invention belongs to the technical field of building assistive devices, and particularly relates to a large-span steel structure truss high-altitude roller sliding device which comprises a supporting mechanism, a clamping mechanism, a moving mechanism and an auxiliary mechanism. The supporting mechanism comprises a cross beam, the cross section of the cross beam is of an I-shaped structure, and beam grooves are symmetrically formed in the two sides of the cross beam in the length direction of the cross beam. And the clamping mechanism is mounted above the cross beam and is used for fixing and dismounting the truss. A spline rod is in sliding fit with a spline sleeve, the distance between a movable frame and a fixed frame is adjusted in combination with a second self-locking threaded rod, and cross beams with different thicknesses are adapted; in the auxiliary moving assembly, a second double-end self-locking screw drives a sliding block, a linkage movable rod and an auxiliary wheel to adjust the distance, beam grooves with different depths are adapted, the auxiliary wheel forms track constraint, and the auxiliary moving assembly can be rapidly installed on different supporting mechanisms within a certain range.

The invention provides an elevator compensation chain length measuring device, and relates to the technical field of mechanical automation, the technical key points are that the elevator compensation chain length measuring device comprises a support frame and a length measuring sensor, two groups of symmetrical stabilizing devices are arranged above the support frame, each stabilizing device comprises two stabilizing rolling shafts extending along the width direction of the support frame and a stabilizing belt, a pressing device is arranged above each stabilizing device, each pressing device comprises a pressing rolling shaft corresponding to the corresponding stabilizing rolling shaft and a pressing belt, and a driving device is arranged above each pressing device to drive the corresponding pressing device to move in the vertical direction; a motor sliding table is arranged on the supporting frame and used for adjusting the position of the length measuring sensor. The length measuring sensor is not affected by the surface smoothness of the compensation chain in the measuring process, meanwhile, vibration and friction borne by the compensation chain in the length measuring process are reduced through the pressing device and the stabilizing device, and therefore the possibility of errors is reduced.

The utility model discloses a slitting line buffer pit front automatic pressing device which comprises a base and a fixing frame, the fixing frame is fixedly connected to the base, a lifting mechanism is arranged on the base and the fixing frame, a U-shaped frame is arranged on the lifting mechanism, the U-shaped frame is arranged above the fixing frame, an upper roll shaft is rotationally connected to the U-shaped frame, and a lower roll shaft is arranged on the upper roll shaft. The fixing frame is rotatably connected with a lower roller shaft, the upper roller shaft and the lower roller shaft are arranged in parallel, the base and the lifting mechanism are provided with a driving mechanism, the driving mechanism is connected with the upper roller shaft and the lower roller shaft, and the lifting mechanism comprises a first support, a second support, a screw rod, a lifting block and a rotating shaft. The driving mechanism comprises a driven bevel gear, a movable bevel gear, a key groove, a clamping key and a fixed bevel gear. The utility model belongs to the technical field of transformer silicon steel coil production, and particularly relates to an automatic pressing device in front of a longitudinal shearing line buffer pit.

The utility model relates to a rolling shaft device for assisting indoor threading, and belongs to the technical field of wire box threading auxiliary devices. The utility model aims to protect a wire inlet end wire box and wire skin and improve the working efficiency. According to the technical scheme, the device comprises a first support, a second support, rolling wheels and angle steel, the first support is of a structure that the front ends of a first supporting rod and a second supporting rod are connected and the rear ends of the first supporting rod and the second supporting rod are separated, and the whole device is in a V-shaped opening shape; the first support and the second support are arranged in parallel, the roller is connected between the first support and the second support through the roller shaft, and the angle steel is fixed at the rear ends of the first supporting rod and the third supporting rod. The idler wheels are U-shaped idler wheels or V-shaped idler wheels with grooves in the middles. And a threading space is formed between the two rollers. The second supporting rod can rotate relative to the first supporting rod, and a compression spring is arranged between the second supporting rod and the fourth supporting rod. The indoor wire pipe threading device is used for indoor wire pipe threading.

The utility model relates to a heaven and earth hinge which comprises a hinge cup, a first crank, a second crank, a buffer roller assembly, a first buffer, an elastic structure, a rolling shaft, two half shells, two half crank fixing plates and a fixing plate. The two half shells form a shell, and the two half crank fixing plates form a mounting piece; the buffer roller assembly, the first buffer, the elastic structure and the rolling shaft are arranged between the two half crank fixing plates, the buffer roller assembly is pushed by the first buffer, and the rolling shaft is pushed by the elastic structure; the crank mechanism is characterized in that a convex curved surface is arranged at the left end of the second crank, a concave curved surface is arranged on the left portion of the second crank, the rolling shaft can be matched with the convex curved surface, and the buffer roller assembly can be matched with the concave curved surface. In the whole door opening and closing process, the second crank is in an unstressed state, so that the door can be in a free state, namely the door opening and closing force does not exist, and the product is more convenient and stable to use.

According to the embossing machine provided by the utility model, the top plate is driven to move in the horizontal direction of the first sliding groove, so that the slope of the top plate moves left and right along the inclined surface of the fixed seat and further drives the fixed seat to move up and down in the vertical direction; the upper rolling shaft moves up and down along with the fixing base and deviates from the center of the first rotating gear through the sliding block coupler, so that the distance between the upper rolling shaft and the lower rolling shaft is adjusted, meanwhile, the center distance between the first rotating gear and the second rotating gear is not changed, normal meshing of the first rotating gear and the second rotating gear is guaranteed, and stable transmission of gear pieces is achieved.

The utility model relates to the technical field of wire and cable winding, and discloses a wire and cable winding guide device, including a base, a fixed seat fixedly connected to the upper surface of the base, a reciprocating screw rod rotatably connected between the fixed seats, a guide bar threadedly connected to the side wall of the reciprocating screw rod, a limit assembly provided on the side wall of the reciprocating screw rod, used to limit the guide bar from rotating, a motor 1 fixedly connected to the side wall of the fixed seat on one side, an output end of the motor 1 fixedly connected to one end of the reciprocating screw rod, a fixed block 1 fixedly connected to the upper surface of the base, and a rotating column 1 rotatably connected inside the fixed block 1. In the utility model, the reciprocating screw rod is rotated by starting the motor 1, so that the sliding block slides on the reciprocating screw rod with the guide bar, and at the same time drives the rotating wheel to rotate, so that the roller rotates, so that the winding wheel rotates, so as to achieve a synchronous winding effect, and the practicality of the device is improved by the above structure.

A position adjustment device for roller processing relates to the technical field of auxiliary equipment for roller processing. Placement grooves are respectively provided on the groove walls on both sides of the installation groove, and adjustment mechanisms are installed in the placement grooves. A limiting groove is provided on the main frame, and a moving mechanism is installed in the limiting groove. A supporting mechanism is installed on the moving end of the moving mechanism. The limiting groove consists of a positioning groove, a sliding groove and two moving grooves, and the two moving grooves are located on both sides of the positioning groove. The sliding groove is connected with the positioning groove and the two moving grooves. The position adjustment device for roller processing described in the utility model adjusts the position of the main frame through the adjustment mechanism so that the center of the main frame is aligned with the center of the clamping end of the processing device, supports the position of the roller on the overhead crane through the supporting mechanism, and guides the position of the roller through the moving mechanism so that the roller is aligned with the center of the clamping end of the processing device.

The utility model relates to the technical field of fluent strips, and discloses a fluent strip with an anti-abrasion structure, which comprises a support, a rolling shaft is arranged in the support, the side wall of the rolling shaft is fixedly connected with an idler wheel, two ends of the support are fixedly connected with baffles, and the baffles are fixedly connected with the support. A lubricating assembly is arranged on the inner wall of the support. According to the fluency strip with the anti-abrasion structure, lubricating oil is brought to the whole transmission part along with the movement of the pin rollers, independent oil injection or manual oil adding is not needed, the maintenance frequency and the labor cost are reduced, the slope structure of the outer ring guides external sundries not to enter a bearing area but slide to the outside of a lubricating assembly, chippings entering a bearing are reduced, and the service life of the bearing is prolonged. The lubricating oil quantity is automatically controlled, oil bubbles or over-lubrication is prevented, the oil discharge hole automatically releases oil, the oil updating function is achieved, the lubricating oil is kept clean, the lubricating reliability is improved, and the phenomena of abrasive particle abrasion, corrosion, emulsification and the like are reduced.

The present invention discloses a taping mechanism of a taping machine. The technical scheme of the present invention is: it includes a cutter module and a power module capable of driving the cutter module to move, the power module includes a support frame, a transplanting frame is slidably connected to the slide rail, a motor and an active synchronous wheel connected to the motor are respectively arranged at both ends of the support frame, a driven synchronous wheel arranged in a 2X2 array is arranged on the transplanting frame, and an abutting synchronous wheel is arranged at the lower part of the guide rod; the cutting component includes a telescopic cylinder arranged on the side plate, the telescopic cylinder is connected to the cutter, and a one-way roller and a blade roller are respectively arranged on both sides of the cutter on the side plate, the cutting component also includes a tape suction block, a suction hole connected to a negative pressure device is arranged on the fitting surface, and an arc surface cooperating with the blade roller is arranged on the top of the tape suction block. The scheme provided by the present invention can automatically attach the material tape from the side of the bottle body to the bottom with a lifting tape left.

The utility model relates to the technical field of automatic feeding, and discloses an automatic feeding device based on a high-speed precision punching machine, which comprises a base, a material shaft is rotatably connected to the front side of the top of a bearing plate, a direct current motor is fixedly connected to the rear side of the bottom of the bearing plate, and a gear shaft is fixedly connected to the output end of the direct current motor. The top of the bearing plate is fixedly connected with a lifting arm, the bottom of the telescopic rod is fixedly connected with a pressing and fixing clamp, and the inner wall of the pressing and fixing clamp is rotationally connected with a plurality of rotating wheels. According to the steel coil fixing device, raw materials are placed on the material shaft, then the outer wall of the material shaft is controlled to be contracted and contracted so that the material shaft can be attached to the inner wall of a steel coil, the effect of fixing the steel coil is achieved, and a guided steel sheet enters the gap between the two conveying belts from the feeding port; a plurality of rolling shafts are rotationally connected with the inner walls of the two conveying belts, so that the conveying belt is more stable, and the friction force for conveying the steel sheets is increased.

The invention discloses a screw taking-out device and a using method thereof, and belongs to the technical field of aeronautical manufacturing and maintenance, the screw taking-out device comprises a sleeve, a locking ring, a cylindrical rolling shaft and the like, the cross section of an inner hole of the sleeve is a similar triangle formed by connecting three linear sections and three arc sections at intervals, and the locking ring is provided with three strip-shaped cylindrical rolling grooves; and the cylindrical rolling shaft and the cylindrical rolling groove are combined and then are placed and limited in the inner hole of the sleeve. During use, the screw rod is inserted among the three cylindrical rolling shafts in the locking ring, the outer sides of the cylindrical rolling shafts are adjacent to the arc section of the inner hole in a non-extrusion state, the sleeve is rotated, the cylindrical rolling shafts slide to the linear section of the inner hole under the friction force action of threads of the screw rod, the screw rod is clamped by the cylindrical rolling shafts, and the sleeve is continuously rotated to screw out the screw rod. According to the screw disassembling device, when the screw is disassembled, torque applied to the screw acts on the axis of the screw, the screw is prevented from being broken in the rotating and taking-out process, and the disassembling work efficiency is not affected while the quality of a product fastened by a bolt is guaranteed.

The present invention relates to the technical field of gantry machining centers, specifically to a closed gantry machining center, including a load-bearing mechanism, a traction mechanism, and a clamping mechanism, wherein the load-bearing mechanism includes a chassis assembled on the closed gantry machining center, a load-bearing column mounted on the bottom of the chassis, two auxiliary rollers movably mounted inside the chassis, and a positioning slide movably mounted on the chassis. By setting a plurality of first boosting blocks that can perform circumferential boosting and clamping against the inner concave holes of the circular workpiece master, and installing a second boosting block distributed in the same direction on the first boosting block, and installing a core barrel for limiting constraint and load-bearing at the inner end of the first boosting block, combined with the elastic traction of the spring on the first boosting block, and the lateral stretching and guiding of the second boosting block by the pull rod, when the adjusting rocker is rotated and pushed clockwise, the spiral push rod can be retracted inward along the threaded groove of the inner cavity of the core barrel, thereby enabling the circular workpiece master to be effectively adapted for boosting and clamping.

The utility model discloses a rolling shaft type material frame conveyor, which belongs to the field of industrial automation, and comprises a rack, a plurality of rolling shafts are uniformly arranged on the rack along the length direction of the rack, the rolling shafts rotate through a driving motor arranged on the rack, a frame body which moves along the length direction of the rack is conveyed on the rack through the rolling shafts, and the rolling shafts are arranged on the frame body. The device comprises a rack and is characterized in that the rack is provided with a positioning and deviation rectifying mechanism used for accurately positioning a frame body at the position of a discharging port of an elevator, the positioning and deviation rectifying mechanism comprises a positioning plate arranged on the rack through a mounting seat, and the positioning plate is provided with a fixing frame through a hydraulic cylinder, and the fixing frame can move in the direction perpendicular to the conveying direction of the frame body. According to the rolling shaft type material frame conveyor, the material frame can be rapidly and accurately positioned to the designated position through the positioning deviation rectifying mechanism, manual secondary adjustment is not needed, and therefore time is saved, equipment faults caused by improper position of the material frame can be reduced, and stability and reliability of equipment are improved.

The utility model discloses an ironing head moving mechanism of a packing machine, which comprises a supporting mechanism, a pressing mechanism and a moving mechanism, the driving mechanism is connected with the supporting mechanism; the sliding mechanism is connected with the driving mechanism; the ironing head is arranged on the sliding mechanism; the driving mechanism comprises a driving motor connected with the supporting mechanism; the driving wheel is connected with a driving shaft of the driving motor; the rolling shaft is arranged at the non-circle-center position of the end face of the driving wheel; the sliding mechanism comprises a sliding seat connected with the rolling shaft; the sliding groove is formed in the sliding seat, and the rolling shaft is located in the sliding groove; the linear bearing is arranged in the moving direction of the ironing head, and the sliding base is connected to the supporting mechanism in a sliding mode through the linear bearing. In the utility model, the driving motor drives the driving wheel to rotate, so that the rolling shaft on the end face of the driving wheel applies force to the sliding chute, the sliding seat moves on the linear bearing, the ironing head moves back and forth, the structure is simple, the failure rate is low, and the cost is low.

The utility model discloses a bevel workpiece polishing device which comprises a base, a limiting seat is arranged at the top of the base, a workpiece body is arranged in the limiting seat, a frame body is arranged at the top of the base, a first air cylinder is fixed to the top of the frame body, an adjusting mechanism is arranged at the top end in the frame body, and a second air cylinder is fixed to the top of the adjusting mechanism. The output end of the first air cylinder is connected with the adjusting mechanism through a telescopic rod, the third servo motor is arranged on the side, close to the workpiece body, of the adjusting mechanism, and the output end of the third servo motor is provided with a polishing wheel through a rolling shaft. By installing the base, the frame body, the adjusting mechanism, the fixing frame, the second driving block, the second lead screw, the transmission piece, the second servo motor, the movable plate, the polishing wheel and the workpiece body, the direction of the polishing face of the polishing wheel can be changed, the polishing wheel can be attached to the inclined face of the workpiece body, and dead corners are not prone to being generated during polishing.

The utility model provides a self-adaptive roller chain tensioning device which comprises a tensioning wheel and a locating piece, the outer side wall of the tensioning wheel abuts against a roller chain, the tensioning wheel is rotationally connected to one end of a connecting rod through a rolling shaft, the other end of the connecting rod is fixedly connected with a driven wheel, and the driven wheel is arranged in the locating piece. A driving rod corresponding to the driven wheel is arranged in the positioning piece, and the driving rod is fixedly connected with the driving assembly; a tooth groove is formed in the outer wall of the driven wheel, a rack is fixedly arranged on the end face, close to the driven wheel, of the driving rod, and the rack is meshed with the tooth groove. The automatic tensioning device has the advantages that pre-tightening force is applied to the driving rod through the driving assembly, the driving rod drives the driven wheel to rotate under the condition allowed, then the tensioning wheel is made to move, the automatic tensioning function is achieved, meanwhile, one-way rotation limitation on the driven wheel is completed through the ratchets on the driven wheel and the positioning disc in the positioning piece, and the tensioning effect is improved. And the working state of the tensioning wheel is stabilized.

The utility model discloses a motor train unit side door lower swing arm roller replacing device which comprises a connecting sleeve, a first connecting block and a second connecting block, the connecting sleeve is arranged to be of a cylindrical barrel-shaped structure, the first connecting block and the second connecting block are arranged at the two ends of the connecting sleeve respectively, a connecting groove is formed in the first connecting block, and the second connecting block is arranged in the connecting groove. A connecting hole is formed in the second connecting block, the connecting sleeve and the connecting hole are coaxially arranged, and the extension line of the connecting groove perpendicularly intersects with the axis of the connecting sleeve; through the arrangement of the connecting sleeve, the connecting groove and the connecting hole, the rolling shaft of the lower swing arm roller of the door is connected with the connecting groove in a matched mode, the wrench is connected with the connecting hole in a matched mode, the axis of the rolling shaft is consistent with the connecting sleeve, and therefore the lower swing arm roller of the door is disassembled through the wrench. The connecting grooves are matched with the corresponding rolling shafts, so that different conventional wrenches can be used for disassembly, and meanwhile, conventional wrenches with different lengths can be replaced based on actual conditions to adjust the torque so as to ensure effective disassembly.

The invention discloses a material lifting device for decoration engineering, comprising: a guide rail slidably provided with a sliding seat; the rolling shaft is rotatably installed on the sliding seat and provided with a motor used for driving the rolling shaft, a cooling groove is formed in the other end of the rolling shaft, and a steel wire rope is wound on the rolling shaft; the heat dissipation cylinder is installed on the sliding seat, one end of the heat dissipation cylinder is attached to the other end of the rolling shaft, an outlet and an inlet which are communicated with the cooling groove are formed in the end face of one end of the heat dissipation cylinder, check valves are installed in the outlet and the inlet respectively, and a piston plate is arranged in the heat dissipation cylinder in a sliding mode; the first transmission structure is installed on the rolling shaft and is in transmission connection between the piston plate and the rolling shaft so that the piston plate can reciprocate in the axial direction of the heat dissipation barrel. The problem that heat generated by operation of a motor of an existing electric hoist affects the service life of a steel wire rope of the electric hoist is solved.

This invention provides an assembly device for an air pump rotor, including a pressing mechanism, a positioning mechanism, and a load-bearing locking mechanism. The positioning mechanism is used to position a first workpiece, and the pressing mechanism, located above the positioning mechanism, is used to press a second workpiece. The load-bearing locking mechanism includes a support rod, a positioning shaft, a load-bearing locking block, and a locking cylinder. The support rod can move in the opposite direction of pressing. The positioning shaft, located at the top of the support rod, is used to position an assembly part on the first workpiece. The support rod has an insertion hole perpendicular to the pressing direction. The load-bearing locking block is inserted into the insertion hole and slidably connected to it. A roller is located at the top of the insertion hole, and a locking part is provided on the load-bearing locking block. After the positioning shaft positions the assembly part on the first workpiece, the locking cylinder drives the load-bearing locking block to move, causing the locking part to abut against the outer periphery of the roller and lock the support rod. This invention achieves automatic assembly of the air pump rotor. During pressing, the load-bearing locking mechanism locks the positioning state, extending the service life of the equipment and improving the assembly quality.