32results about How to "Prevent off-chain" patented technology

The invention provides a chain tension checking device. The chain tension checking device can be used for regulating the tension of a chain, the chain is effectively prevented from taking off, and the service life of the chain tension checking device is prolonged. The chain tension checking device comprises a rack and a chain wheel, wherein the chain wheel is in mesh transmission with the chain, and the chain is fixedly provided with a chain board. The chain tension checking device provided by the invention is characterized in that the rack is provided with a sliding rail, a wheel shaft of the chain wheel is arranged on a sliding block, the sliding block is arranged on the sliding rail, the sliding block is connected to a screw rod, the screw rod penetrates through the rack after being sleeved with a spring, the tail end of the screw rod is sleeved with an induction nut, and a sensor is arranged under the induction nut and is arranged on the rack.

The invention discloses a movable type multidirectional code scanning device for smokebox storage. First stand columns are fixedly mounted at four corners of a base; the upper parts of the front and rear first stand columns are connected through a longitudinal beam; a guide groove is formed in each of the longitudinal beam and a transverse beam; an adjusting rod is arranged on one side of the transverse beam; a code scanner is fixedly connected with the adjusting rod through a T-shaped plate; a bearing pedestal is arranged on one side of the upper part of the base; a rotary shaft is arranged in the bearing pedestal; a rotary disc is fixedly connected with the upper end of the rotary shaft; a clamping device is arranged on the rotary disc; and a placement table is arranged on one side of the upper part of the clamping device. According to the movable type multidirectional code scanning device, the longitudinal beam and the transverse beam are arranged on a rack; the code scanner is mounted on the transverse beam and moves on the transverse beam vertically and transversely; in addition, the transverse beam is mounted on the longitudinal beam through a first sliding block, so that multidirectional movable code scanning of the code scanner is realized; and moreover, the clamping device for positioning a smokebox is arranged at the lower part of the placement table, so that the situation that a worker overturns the smokebox to and fro to adjust the position of a bar code is avoided, the labor strength of the worker is reduced, and the cigarettes and tobacco storage efficiency isimproved.

The invention discloses a chain wheel conveyor. The chain wheel conveyor comprises a conveyor support, a reel chain, a transmission gear and a plurality of rollers. A driving chain wheel is disposed on the end portion of at least one side of the conveyor support, and a driven chain wheel is disposed at the other end, relative to the driving chain wheel, of the conveyor support. The driving chain wheel is connected with the driven chain wheel through the reel chain, and rotating chain wheels are arranged on the end portions of the rollers. The reel chain is placed on the lower portions of the rotating chain wheels, and the reel chain meshes with the rotating chain wheels. The two ends of the rollers are fixed to the conveyor support. The transmission gear is connected with the driving chainwheel, and drives the rotation of the driving chain wheel, thereby sequentially driving the transmission of the reel chain and the rotation of the rotating chain wheels. The chain wheel conveyor hasa simple structure, rapid maintenance, convenient installation and disassembly and a long service life.

The embodiment of the invention relates to the technical field of block chains, in particular to a league chain signature generating method and device. A corresponding multiple signature can be generated specific to each block in a league chain in order to determine the identity of each block efficiently and safely. When the league chain is extended or bifurcated, the chain disconnection caused byindefinite identity of the blocks can be avoided.

The invention discloses a rope guide with a guide rod type adjustable rope guide device and a sleeve type rope press. The rope guide comprises a sleeve type rope pressing device and a guide rod type threaded guide mechanism, wherein a fixed base in the sleeve type rope pressing device is connected to the front surface of a winding drum through a bolt; a sleeve on the sleeve type rope pressing device is pressed on a steel wire rope on the winding drum; the guide rod type threaded guide mechanism is connected to the front surface of the winding drum through a bolt, and is positioned below the sleeve type rope pressing device; the guide rod type threaded guide mechanism is equipped with an adjustable rope guide device; one end of a threaded shaft on the guide rod type threaded guide mechanismis connected with a small chain wheel; the small chain wheel is connected with a big chain wheel through a chain; the big chain wheel is connected on a joint shaft; the joint shaft is connected to one end of a winding drum shaft of an electric hoist through a bolt; a tightening device is connected on the chain; and a cut-out switch for chain breaking or chain separating is arranged on the tightening device.

A tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of an elevator comprises a counter weight mechanism (device) and a lever. A lever adjusting mechanism (device) is installed on an enclosure on the lower portion of the elevator and connected with one end of the lever, the other end of the lever is connected with the counter weight mechanism, the middle of the lever is connected with a lever rotation shaft mechanism (device) through a sliding supporting plate, and the lever rotation shaft mechanism is connected with a steering chain wheel assembly or a belt pulley assembly on the lower portion of the elevator. The lever adjusting mechanism is a nut lead screw mechanism. A left tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of the elevator and a right tensioning device with tension and gravity capable of being adjusted synchronously and on the lower portion of the elevator are arranged on the lower portion of the elevator. The tensioning device is balanced in tension, effectively prevents the steering chain wheel assembly or the belt pulley assembly on the lower portion of the elevator from deviating from a chain or a belt, and is reliable in running.

The invention provides a chain supporting wheel and a lower part bend wheel of a shallow slot separator and belongs to the shallow slot separator fitting field. The chain supporting wheel and the lower part bend wheel of the shallow slot separator mainly comprise wheel hubs (1) and hub sleeves (2), wherein the wheel hubs (1) are in the shape of T; the hub sleeves (2) which are matched with the wheel hubs (1) are in the shape of a groove; inclined planes (6) are arranged inside of an outer edge of the wheel hubs (1); two wheel hubs (1) are installed in opposite directions at both ends of a shaft (4) through keys (3); the hub sleeves (2) are snapped on the wheel hubs (1) by using screws. End parts of the two wheel hubs form a trapezoid to prevent chain wheel deviation; the inclined planes on the wheel hubs can assist in preventing chain falling; chains slide on the hub sleeves when chains are started to run, and the wheel hubs and the shaft are driven to move; if any wearing exists, only the hub sleeves are needed to be replaced. According to the invention, current chain wheels can be replaced by the chain supporting wheel and the lower part bend wheel of the shallow slot separator. The invention is advantaged by a simple structure, convenient processing, low cost, high security, easy installation and easy replacing.

The invention discloses a guide rod type cable-stayed resisting hoist rope guide comprising a guide rod type thread guiding mechanism. The guide rod type thread guiding mechanism is provided with an adjustable rope guiding device and connected to the front face of a winding drum; a rope pressing wheel on the guide rod type thread guiding mechanism is pressed on the last circle of a steel wire ropeon the winding drum, and the steel wire rope moves downwards through rope guiding wheels to be connected to a lifting hook set; the guide rod type thread guiding mechanism is provided with the adjustable rope guiding device; one end of a thread shaft on the guide rod type thread guiding mechanism is connected with a small chain wheel, and the small chain wheel is connected with a large chain wheel through a chain; the large chain wheel is connected to a joint shaft, and the joint shaft is connected to one end of a winding drum shaft of an electric hoist through a screw; and a tension device is connected to the chain, and a chain-breaking or chain-disengagement cut-off switch is arranged on the tension device.

The invention discloses a flexible chain tensioning device. The flexible chain tensioning device comprises two symmetrically-arranged rocker arm assemblies, a spring assembly and a mounting bottom plate. The rocker arm assemblies comprise tensioning chain wheels, chain wheel shafts and rocker arm rods, the tensioning chain wheels are rotationally assembled at the top ends of the rocker arm rods through the chain wheel shafts, the bottom ends of the rocker arm rods are hinged to the mounting bottom plate, and the spring assembly is assembled between the two rocker arm rods in a crossing manner. According to the chain tensioning device, flexible tensioning is conducted on a chain, the functions of automatic compensation and automatic tensioning adjustment are achieved, the potential safety hazards of gear skipping and chain disengaging happening in the chain transmission process are reduced, and meanwhile the working efficiency of chain tensioning operation is improved.

The invention provides a zipper tooth oxidized wire with constant tension. The zipper tooth oxidized wire comprises an oxidized wire main body, wherein the oxidized wire main body comprises a plurality of oxidization grooves which are arranged in parallel; each oxidization groove is at least provided with one belt-in driving shaft, one belt-out driving shaft and an immersing rolling shaft; a discharging end of the oxidization groove located at the tail end is provided with a motor for pulling a zipper belt; the motor is in transmission connection with a leading-out rotary shaft group; zipper belt traction devices are arranged at a belt-out end of each oxidization groove and an inlet end of the first oxidization groove except the oxidization groove at the tail end; each zipper belt traction device comprises a pair of upper traction wheel and lower traction wheel which are engaged with each other up and down and have flat-tooth convex lines; and each upper traction wheel is further provided with a pressure adjusting mechanism. According to the zipper tooth oxidized wire with the constant tension, phenomena of zipper releasing, winding and the like, caused by the fact that the tightness of the zipper is different between the different oxidization grooves can be avoided, and a worker can relatively easily and conveniently operate; and performances including coloring difference, tooth surface scratching, the stretching rate of a zipper and the like can be improved very well.

The invention relates to a coarse rack pull chain underwater steering structure capable of avoiding chain come-off and sticking. The underwater steering structure comprises a coarse rack, a pull chain, an upstream section linear chain groove, a downstream section linear chain groove and an arc chain groove, wherein the coarse rack is fixedly provided with the upstream section linear chain groove, the downstream section linear chain groove and a semicircular chain groove; the lower end of the upstream section linear chain groove is connected with the lower end of the downstream section linear chain through the arc chain groove in a smooth transition mode; the pull chain is arranged in the upstream section linear chain groove, downstream section linear chain groove and arc chain groove; the width of the upstream section linear chain groove body is less than that of the downstream section linear chain groove; and from the lower end of the upstream section linear chain groove to the lower end of the downstream section linear chain groove, the width of the arc chain groove gradually increases. The pull chain is always restricted to the inside of the continuous chain groove body when operating underwater, thereby completely avoiding the possibility of pull chain come-off.