24 results about "Chain fall" patented technology

The invention discloses an annular track device for flushing equipment of an indirect cooling tower, which is used for accommodating and moving a hose and a cable required by the flushing equipment and comprises a drag chain and a groove box, the drag chain can be folded to form a first drag chain part, a second drag chain part and a bent drag chain part connected between the first drag chain part and the second drag chain part, the first drag chain part, the second drag chain part and the bent drag chain part are arranged in the horizontal direction, and the groove box is in a circular ring shape and used for containing the drag chain. An outer annular groove and an inner annular groove which are concentrically arranged are formed in the groove box, the first drag chain part is contained in the outer annular groove, and the second drag chain part is contained in the inner annular groove. The problem that the drag chain falls off due to transverse deviation and vibration in the running process can be solved.

The invention provides a movable chain block lifting installation platform device and method, and relates to the technical field of installation and production of ocean structures, the movable chain block lifting installation platform device comprises a main body support, a storage rack and a lifting rack, the storage rack is arranged on the main body support in a sliding mode, and the lifting rack is arranged in the storage rack and drives the storage rack to move longitudinally; a lifting joint for driving the lifting frame to move longitudinally is connected to the upper portion of the body support, a chain block is hung on the lifting joint, the end, away from the lifting joint, of the chain block is connected with the bottom of the lifting frame, the upper portion of the storage frame penetrates through the top of the body support and then is provided with a storage plate, and the storage plate is provided with a tool holder plate for fixing a structure. The heavy object mounting and welding requirements under the condition that the space is limited can be met, the working fatigue problem caused by long-time side-lying overhead welding of workers in the actual production process can be solved, the construction efficiency is improved, and positive application value and actual economic effectiveness are achieved for steel transportation and construction production in the manufacturing industry.

The utility model discloses a chain wheel device and a bicycle and relates to the technical field of bicycles, the chain wheel device comprises a middle shaft, a shaft sleeve, a chain wheel and a telescopic mechanism, the middle shaft is used for being rotationally installed on a bicycle frame, the shaft sleeve is arranged on the middle shaft in a sleeving mode and can move in the axial direction of the middle shaft, the shaft sleeve and the middle shaft are relatively fixed in the circumferential direction of the middle shaft, and the chain wheel is arranged on the shaft sleeve; the telescopic mechanism is arranged in the middle shaft and connected to the shaft sleeve and / or the chain wheel so as to drive the shaft sleeve to move in the axial direction of the middle shaft through stretching and retracting. According to the chain wheel device and the bicycle, the riding efficiency of a user can be improved, the situations of chain falling after returning, asymmetric abrasion of the tooth part, tooth part deformation and the like can be reduced, and therefore the riding experience of the user can be improved, and the service life of the bicycle is prolonged.

The invention relates to the technical field of high-pile wharf hoop installation, and discloses a high-pile wharf hoop installation intelligent operation platform which comprises an operation platform body, a hydraulic pile clamping unit, a chain block lifting unit and a PLC control unit. The working platform comprises a base, a fixed guardrail and a movable guardrail, the fixed guardrail and the movable guardrail are both arranged at the top of the base, a foot pad plate is installed at the top of the base, and a butt joint opening is formed in the base; the hydraulic pile clamping unit comprises a hydraulic pump station and two symmetrically-arranged hydraulic jacks, and the hydraulic pump station is installed on the top of the base. According to the high-pile wharf hoop installation intelligent operation platform and the construction method, the hydraulic pile clamping unit and the chain block lifting unit are matched, so that the operation platform and a pile body of a pile foundation are independently and stably combined, dependence on continuous suspension of hoisting equipment is eliminated, platform overturning can be effectively avoided even in the environment with complex sea conditions, and the construction efficiency is improved. Safety of operators is guaranteed, and high risk of high-altitude falling of the operators is prevented.

The utility model relates to the technical field of equipment maintenance and assembly of large-diameter travelling wheels and bearings in limited space, and particularly discloses a special maintenance trolley which comprises a tray and a workbench, the tray is installed on the workbench, the workbench is installed on a base through a scissor lifting mechanism, and the middle of a pull rod of the scissor lifting mechanism is connected with a chain block power mechanism. A transmission box of the chain block power mechanism is installed on an installation base, a handle frame is installed on the upper portion of the installation base, a hand chain sliding frame is installed on the handle frame, and a hand chain is supported on the hand chain sliding frame to slide. The chain block is adopted to control the shear fork lifting mechanism to act, then lifting of the workbench is controlled, pure mechanical transmission is achieved, operation is easy, carrying is convenient, geographical limitation is avoided, maintenance difficulty and safety risks of operators are reduced, and application and popularization value is achieved in installation and maintenance of large-scale equipment large-weight parts in narrow spaces. The device is simple in structure, suitable for installation of different parts, high in applicability and accurate in positioning, and assembly of the parts is simpler and more efficient.

The utility model discloses a sling chain lifting device, which relates to the technical field of hoisting, and comprises a hoisting plate and a protection component, an electric rotating table is mounted at the upper end of the hoisting plate, and the protection component for preventing a sling chain from being out of control and falling at top speed is arranged on the outer side of the electric rotating table. And the protection assembly comprises a protection frame, a clamping plate, a friction plate, an electric push rod and a displacement limiting groove, the clamping plate is arranged in the protection frame, the friction plate is installed on the inner side surface of the clamping plate, the electric push rod is installed on the outer side surface of the clamping plate, and the displacement limiting groove is formed in the inner wall of the protection frame. And a connecting table is arranged at the upper end of the electric rotating table. According to the sling chain lifting device, a chain is installed in the protection frame in a penetrating mode, so that the stability is improved while the chain is wound and unwound outside, the clamping plates and the friction plates can play a role in clamping the chain when the chain is out of control, the falling speed of the sling chain is reduced or the sling chain is braked suddenly, safety is improved, and escape time is won for constructors.

The utility model discloses a chain wheel assembly and a bicycle, and relates to the technical field of bicycles, the chain wheel assembly comprises a middle shaft, a shaft sleeve, a chain wheel and a driving mechanism, the middle shaft is used for being rotationally installed on a bicycle frame, the shaft sleeve is arranged on the middle shaft in a sleeving mode and can move in the axial direction of the middle shaft, the shaft sleeve and the middle shaft are relatively fixed in the circumferential direction, and the chain wheel is arranged on the shaft sleeve; the driving mechanism is used for driving the shaft sleeve to axially move along the middle shaft. According to the chain wheel assembly and the bicycle, the riding efficiency of a user can be improved, the situations of chain falling after returning, asymmetric abrasion of the tooth part, tooth part deformation and the like can be reduced, and therefore the riding experience of the user can be improved, and the service life of the bicycle is prolonged.

The application discloses a back-off prevention tooth disc assembly and a bicycle, and relates to the technical field of bicycles. The back-off prevention tooth disc assembly comprises a middle shaft, a overrunning clutch, a shaft sleeve, a tooth disc and a driving mechanism. The middle shaft is used for being rotatably installed on a frame. The overrunning clutch is installed on the outer circumferential wall of the middle shaft. The shaft sleeve is sleeved on the outer side of the middle shaft and is connected to the overrunning clutch. The shaft sleeve can move along the axial direction of the middle shaft. The tooth disc is arranged on the shaft sleeve. The driving mechanism is connected to the shaft sleeve and / or the tooth disc, and is used for driving the shaft sleeve to move along the axial direction of the middle shaft. The back-off prevention tooth disc assembly and the bicycle can not only improve the riding efficiency of a rider, but also reduce chain falling, tooth asymmetry wear and tooth deformation, thereby improving the riding experience of the rider and prolonging the service life of the bicycle.

The utility model belongs to the technical field of chain falling prevention, and particularly discloses a thin type lifting beam lifting chain falling prevention device which comprises a chain wheel and a chain which are connected in a sleeved mode, a pair of limiting baffles are symmetrically installed outside the chain wheel, the outer ring sides of the limiting baffles extend to the outer end of the outer ring side of the chain wheel, and suspension grooves are formed in the upper ends of the inner sides of the limiting baffles. On one hand, through the arrangement of the limiting baffles, axial limiting can be effectively generated, and the situation that the chain tilts towards the two sides and jumps out in the transmission process is avoided; on the other hand, the self-lubricating assembly is combined with the ash removal assembly to jointly form limiting protection in the transmission process of the chain and the chain wheel, meanwhile, the double effects of lubricating and ash removal can be provided, and the phenomena of transmission clamping stagnation and abnormal abrasion are avoided; and the stability and the safety of the thin hoisting beam hoisting chain in the operation process are achieved through the combination of the two.

The application discloses a direct drive type sprocket device and a bicycle. A linear motor is arranged between a frame and a middle shaft, and a motor rotor is sleeved on the middle shaft and can move along the middle shaft in the axial direction, thereby driving the sprocket fixedly connected with the motor rotor to move along the middle shaft in the axial direction, so that the included angle between the sprocket and the chain is adjusted, the degree of the included angle deviating from the ideal zero degree is reduced, the axial component force caused by the included angle when the chain transmits driving force is reduced, the effective power for driving the driving flywheel to rotate is improved, and finally the riding efficiency is improved. With the linkage mechanism of the linear motor and the sprocket, the transmission included angle is accurately controlled, and a reliable path is provided for optimizing the power transmission efficiency of the variable speed bicycle. In addition, because the included angle is reduced, the meshing cutting range of the chain and the tooth is wider, the chain falling back is reduced, the asymmetric wear of the tooth part is reduced, the axial stress of the tooth part is reduced, the deformation of the tooth is reduced, and the service life is prolonged.

The invention relates to the technical field of electric chain saws, in particular to an electric chain saw with a chain adjusting mechanism, which comprises an outer shell, a chain saw mechanism and a chain adjusting mechanism, a battery is fixedly connected to the bottom of the outer shell, a switch is arranged at the tail of the outer shell, and a cover plate is fixedly embedded in the outer surface of the outer shell. The chain saw mechanism is fixedly mounted in the outer shell; and the stabilizing mechanism is fixedly mounted on the chain saw mechanism. The clamping strip is arranged in the sliding groove of the saw plate, and the limiting grooves are formed in the two sides of the connecting piece of the chain, so that when the chain moves, the limiting grooves in the connecting piece are clamped to the clamping strip of the sliding groove, then the connecting piece and the clamping strip in the sliding groove are relatively limited, and it is ensured that the chain is always attached to the edge of the saw plate in the moving process; the problem that the chain falls off from the saw plate due to the fact that the chain is stretched in a long-time working state is solved, the working stability of the electric chain saw is greatly improved, and particularly the stability of long-time working is kept.

The utility model discloses an automatic adjusting device for a chain of a mining elevator, which belongs to the technical field of mining elevator equipment and comprises a rack, the rack comprises a fixing frame and an adjusting frame slidably mounted at one end of the fixing frame, a first electric telescopic rod is connected between the fixing frame and the adjusting frame, and a driving chain wheel is mounted on the fixing frame. The driven chain wheel is installed on the adjusting frame, locking mechanisms are arranged on the outer wall of the fixing frame and the outer wall of the adjusting frame, and a moving mechanism is installed at the bottom of the machine frame. Due to the arrangement of the fixing frame, the adjusting frame and the first electric telescopic rod, the driving chain wheel is installed on the fixing frame, and the driven chain wheel is installed on the adjusting frame, the tightness degree of the chain can be automatically adjusted through stretching and retracting of the first electric telescopic rod, and the adjusting frame is installed at one end of the fixing frame in a sliding mode. And the chain cannot protrude outwards, so that the risk that the chain falls off during operation is reduced.

The utility model discloses a chain falling prevention device for an intelligent electric bicycle, the intelligent electric bicycle is provided with a chain wheel and a chain wound on the chain wheel and used for transmission, and the chain falling prevention device is characterized by comprising a limiting block and an extension sleeve, the triangular locking part is located at the upper end of the chain, the blocking piece part extends downwards from the inner side of the triangular locking part, the blocking piece part is located on the inner side of the chain, and the spacing distance is smaller than the width of the chain; a locking hole is formed in the center of the triangular locking part, and the locking hole is fixed to a frame through a locking bolt; wherein the extension sleeve is installed on the inner side of the locking hole and used for abutting against the frame. The locking bolt is installed through the locking hole of the triangular locking part, the triangular locking part is fixed to the frame tube, the chain is limited in cooperation with the blocking piece part at the bottom, the anti-falling design of the upper end and the side face is formed, the extension sleeve assists in assembly, the structure is simple, and installation is convenient.

The utility model discloses a chain falling prevention device for a coil unloading bracket platform, which belongs to the technical field of coil unloading bracket platform control and comprises a support, a limiting shaft and an early warning mechanism. The support is installed on the bracket platform, a hole position used for installing the bearing is formed in the support, and the bearing is installed in the hole position of the support and fixed. The limiting shaft penetrates through the inner ring of the bearing, and the minimum distance between the surface of the limiting shaft and the chain is 3-10 mm; one end of the limiting shaft is connected with an early warning mechanism, the early warning mechanism comprises a cylindrical swing rod, and the limiting shaft is vertically connected with the side face of the swing rod; one end of the swing rod is provided with a balancing weight, and the other end of the swing rod is provided with a signal sensor used for converting mechanical displacement into an electric signal to be output; according to the utility model, the technical problem that in the prior art, abnormal jumping of a chain in a chain wheel and chain transmission system of a coil unloading bracket platform is difficult to find in time, so that the chain is separated is solved.

The utility model discloses a synchronizing wheel with a function of preventing a chain from disengaging, which comprises a driving gear and a driven gear, the driving gear is connected with the driven gear through a chain, and the driving gear and the driven gear are respectively provided with a chain-disengaging-preventing structure. And the chain falling prevention structure comprises a limiting structure for preventing the chain from being separated from the driving gear and the driven gear and a mounting structure for fixing the limiting structure. By means of the mode, the synchronizing wheel with the function of preventing the chain from disengaging is provided with the chain disengaging preventing structure, the chain can be prevented from disengaging from the gear after tooth skipping occurs, and the influence of tooth skipping on riding stability and efficiency is reduced.

The invention relates to the technical field of combined chain wheels, in particular to an anti-falling combined chain wheel which comprises a chain wheel body. A chain is arranged on the outer side of the chain wheel in a sleeving mode, an anti-falling mechanism is arranged on the outer side of the chain wheel and comprises supporting rings, the supporting rings are arranged on the two sides of the chain wheel in a sleeving mode, supporting frames are fixedly connected to the supporting rings, and guide wheels are rotationally connected to the tail ends of the supporting frames. An external guide wheel structure is arranged, a chain is driven by a guide wheel, so that the overlong chain is tightened under the limitation of the guide wheel, the probability that the chain falls off from a chain wheel in the transmission process is reduced, meanwhile, the chain can be conveniently limited by a limiting groove formed in the outer side of the guide wheel structure, and the service life of the chain is prolonged. Therefore, the chain is prevented from falling off from the chain wheel due to the fact that the chain is subjected to transverse force in the transmission process.

The utility model discloses a kind of sauce jar handling devices, it is related to sauce jar handling field, including crossbeam, pull locking mechanism, two arms and two parallel arranged upright posts, the bottom end of the upright post is fixed with base by welding, the bottom of base is fixedly installed with two universal castors;The top of two The upright post is respectively fixed with fixed sleeve and sliding sleeve by welding, fixed sleeve is fixed in the outside of crossbeam by welding, sliding sleeve is sleeved in the outside of crossbeam, and can slide along crossbeam, the utility model is by pushing the upright post of right side, make sliding sleeve slide along crossbeam, adjust the interval of two arms, by tightening two nuts one by one, make four embrace board clamping around sauce jar, to ensure the stability of sauce jar in handling process, by operating manual chain fall, make connecting seat, two long guide sleeves and sauce jar move upwards, make sauce jar separate from ground, to facilitate the device to sauce jar and be handled, greatly reduce the problem of sauce jar breakage, broken in handling process.

The utility model provides an integrated chain blocking tooth piece assembly which comprises two cranks, a middle shaft, a small tooth piece and a large tooth piece, a plurality of fixing columns and a plurality of crank claws are arranged on the end face, facing the other crank, of one crank in the circumferential direction, the fixing columns are located on the inner sides of the crank claws, the length of each fixing column is larger than that of each crank claw, and the large tooth piece is located on the middle shaft. Each crank claw is provided with a first installation hole, each fixing column is provided with a second installation hole, the small tooth pieces are fixed to the multiple fixing columns through the multiple fasteners, the large tooth pieces are fixed to the multiple crank claws through the multiple fasteners, and the end face, facing one crank, of each large tooth piece is provided with a chain blocking rod. The chain stopping rod is used for stopping the chain from being clamped between the large tooth piece and the crank. Therefore, the chain can be prevented from being clamped between the adjacent tooth pieces or between the tooth pieces and the crank after chain falling, maintenance operation after chain falling of the bicycle is facilitated, and the practical effect of the chain falling prevention device is guaranteed.

The utility model relates to off -road motorcycle parts technical field, concretely relates to an off -road vehicle chain wheel, the inner side of chain wheel spoke is fixed with inside fender chain plate, inside fender chain plate is located in the first gap and there is a gap between inside fender chain plate and rear wheel, inside fender chain plate is curved surface ring plate, the inner ring of curved surface ring plate extends and is attached to chain wheel spoke, the outer ring of curved surface ring plate is away from chain wheel gear ring, the upper edge of inside fender chain plate is higher than chain wheel gear ring, there is the second gap between inside fender chain plate and chain, adopt above technical scheme, because inside fender chain plate is fixed on the inner side of chain wheel spoke, utilize the side of chain wheel spoke and chain wheel gear ring and there is the first gap between rear wheel, inside fender chain plate only surrounds chain wheel gear ring and part chain wheel spoke, equivalent to only chain wheel gear ring is kept in the periphery, the original chain wheel hub and the installation mode installation structure do not have any change, and simple installation structure can effectively prevent chain falling technical problem.

A zero-gravity hoist system including a chain fall, a motor coupled to the chain fall and configured to drive the chain fall in one or more directions, a power supply configured to provide power to the motor, and a controller having one or more electronic processors. The one or more electronic processors are configured to measure a first force of a load in response to receiving an input, store the measured first force in a memory of the controller, measure a second force of the load, determine a difference between the second measured force and the first measured force, and adjust a height of the load based on determining that the second force differs from the first force by a predetermined threshold.

The novel fluted disc matched with the 13-speed bicycle comprises a fluted disc body, a plurality of thick tooth pieces and thin tooth pieces which are sequentially arranged in a staggered mode are arranged on the outer edge of the fluted disc body in the circumferential direction, the height of tooth tops of the thick tooth pieces and the thin tooth pieces is larger than that of chain rollers, chamfering treatment is conducted on the four side edges of each thick tooth piece, and chamfering treatment is conducted on the four side edges of each thin tooth piece. And the tooth tips of the thick tooth sheets and the tooth tips of the thin tooth sheets are provided with fillet structures. In the utility model, as the chamfers of 155 degrees are arranged at the four side edges of the rear tooth sheet, the rear tooth sheet cannot interfere with an inner chain sheet of a chain when the rear tooth sheet is matched with the 13-speed chain for use, so that the problems that the chain is not smoothly guided in, is blocked, even is stuck and the like can be avoided. And the tooth tips of the thick tooth sheets and the thin tooth sheets are higher than the height of the chain rollers, so that the hidden dangers of chain jumping and chain falling of the chain rollers can be completely eradicated.

According to the electric crankset device and the bicycle, a movable shaft sleeve is arranged on a middle shaft, a crankset is arranged on the shaft sleeve, then an electric control module can control an electric control driving unit to drive the crankset to move along the middle shaft, and finally when a flywheel of the bicycle is subjected to gear change, the crankset is driven to move along the middle shaft. The electric control driving unit can be used for driving the chain wheel to carry out adaptive adjustment along with the gear change of the bicycle, so that the included angle between the chain and the chain wheel is effectively reduced, and the riding efficiency of a bicycle user is improved. In addition, due to the fact that the included angle is decreased, the meshing cut-in range of the chain and the teeth is wider, chain falling caused by returning can be reduced, asymmetric abrasion of the tooth parts is reduced, axial stress of the tooth parts is reduced, tooth deformation can be reduced, and the service life can be prolonged.

The present application relates to the technical field of blast furnace maintenance, and discloses a blast furnace maintenance platform and a cooling wall replacement method, wherein the guide wheel is in rolling contact with the furnace mouth steel ring, and the rolling direction is horizontal; the guide wheel is provided with a rotating frame, the rotating frame is driven by a chain fall, and the chain fall drives the rotating frame to rotate horizontally along the furnace mouth steel ring; the rotating frame is provided with a first winch and a second winch, the ends of the steel wire ropes of the first winch and the second winch are connected with a lifting platform, and the lifting platform is used for carrying workers to install the cooling wall; a hanging beam is arranged on a steel frame column between the blast furnaces, the hanging beam is provided with a hoist beam, and the hoist beam is provided with a center winch; the maintenance platform is arranged above the furnace mouth steel ring, the operator can enter the furnace from the lifting platform to install the cooling wall, and the cooling wall can be hoisted to a specified position in cooperation with the rotating frame; the replacement method has good safety, can shorten the main line construction time, does not need to set up a protection shed, and does not need to damage the furnace skin.