237 results about "Roller chain" patented technology

A truck bed mounted carrier system includes a frame assembly installable in a truck bed with lateral supports and outer main supports, inner supports that slide within the outer main supports, a center outer support, and a second inner support that slides within the center outer support. A carrier frame coupled to the frame assembly extends from and retracts into the truck bed, supported by radius supports that provide structural integrity when extended. The system features a pulley assist mechanism with gas springs that creates a counterbalance force, a mechanical drive assembly with sprocket and roller chain for movement control, and deployable transport stands for ground support during loading operations. Adjustable bed rail struts with locking mechanisms secure the system to the truck bed without permanent modification. Low-friction materials and strategically positioned slides ensure smooth operation throughout the extension and retraction cycles.

The present invention relates to a massage machine comprising: a substantially rectangular frame defining a longitudinal and a transverse direction perpendicular thereto, and a plane spanned by these directions and a center point; and at least one roller conveyor element, in particular a belt, chain, or rope, which runs along the longitudinal direction of the frame and to which a plurality of massage rollers, each with a roller body and a roller axle, are rotatably attached about this axle, wherein the massage rollers can be transported by the roller conveyor element along a closed path that runs in a plane spanned by the longitudinal direction and a vertical direction perpendicular to the longitudinal and transverse directions. According to the invention, the massage machine is characterized in that the massage rollers extend over the entire width, measured in the transverse direction, of a free interior space of the frame.

The utility model discloses a bidirectional clamping and conveying device of a sugarcane cutting and spreading machine. The clamping and conveying device comprises a fixed rack, a movable rack and a driving device, the clamping, conveying and lifting frame is arranged on the fixed rack in a liftable manner; the U-shaped frame comprises a left U-shaped frame body and a right U-shaped frame body, the left U-shaped frame body and the right U-shaped frame body are connected with the clamping conveying lifting frame and located on the left side and the right side of the front end of the frame respectively, and a sugarcane outlet is formed in a U-shaped groove of the U-shaped frame; a front clamping conveying rubber roller chain group; and the rear clamping reversing device comprises a rear clamping reversing mechanism and a first rear clamping conveying shifting tooth chain. According to the clamping and conveying device of the bidirectional sugarcane cutting and spreading machine, cut-off sugarcanes are conveyed through the clamping and conveying shifting tooth chain to move outwards, and are conveyed to the side, where sugarcane ridges are harvested, of the machine under the conveying of the bidirectional clamping and conveying device. The bidirectional clamping and conveying mechanism is adjusted to move left and right in the horizontal direction, and the sugarcane is cut and laid to the left side or the right side according to the terrain.

The invention belongs to the technical field of petroleum drilling machine equipment, and discloses a petroleum drilling machine stepping type translation device and a translation method.The petroleum drilling machine stepping type translation device comprises a mounting frame connected with a drilling machine base, a jacking oil cylinder is connected to the bottom of the mounting frame, the end of a cylinder rod of the jacking oil cylinder is connected with a rotating device, and a sliding device is connected to the lower portion of the rotating device; the installation frame is connected with a drilling machine base through a plurality of sets of pin shafts I, the bottom of the installation frame is connected with the jacking oil cylinder through bolts, the end of a cylinder rod of the jacking oil cylinder is of a threaded structure and is connected to a rotary support of the rotating device, a rotary flange on the rotating device is fixed to a sliding frame of the sliding device through bolts, and a roller chain pulley is arranged in the sliding frame. The bottom of the roller chain pulley is attached to the sliding shoe. Stepping oil cylinders are hinged to the two sides of the sliding frame respectively, the stepping oil cylinders are double-outlet-rod oil cylinders, and the two cylinder rod ends of the stepping oil cylinders are hinged to lug seats on the two sides of the sliding shoes through pin shafts II respectively; the drilling machine can quickly move back and forth or rotate in situ.

The invention discloses a nuclear fusion armored spiral tube superconducting magnet winding and mold falling system and a use method, and relates to the field of research and development of superconducting coils for nuclear fusion. Before mold falling, the armored conductor coil is supported by the supporting seat, the outer limiting column and the inner limiting block. During initial die falling, the coil rotates along with the rotary platform and falls into the groove. Along with increase of the die falling depth, the number of layers of the outer limiting columns is increased, the roller chain drives the supporting seat to descend, the number of the inner limiting blocks is correspondingly increased, and next-step die falling is completed. After die falling is completed, the coil clamp clamps the coil, the roller chain rotates reversely, the supporting seat ascends, and the inner limiting part and the outer limiting part are gradually withdrawn. According to the system, automatic mounting and dismounting of inner limiting are achieved through the chain wheel module, the outer limiting column technology is combined, the die falling size is accurately controlled, and manual operation inconvenience is reduced. Meanwhile, through upward movement of the longitudinal movement mechanism, the capital construction requirement for the pit is reduced, so that the production efficiency is improved, the personnel safety is guaranteed, and the platform building cost and period are reduced.

The present invention belongs to the field of boring technology, and particularly relates to a safety protection device for edge operations on a heavy-duty boring machine turntable. The technical solution is as follows: a safety protection device for edge operations on a heavy-duty boring machine turntable, comprising: arched plates connected to the four sides of the turntable, the four arched plates and the turntable being spliced ​​into a full circle, a square cover plate connected to the lower slide, an inscribed circle cooperating with the four arched plates being provided in the square cover plate, a bracket connected to the wall of the workbench on the side of the pit, a movable roller chain plate connected to the side of the bracket close to the front end of the pit, a fixed cover plate connected to the other side of the bracket, a movable cover plate provided between the fixed cover plate and the square cover plate, and the movable cover plate being slidably connected to the bracket. The present invention provides a safety protection device for edge operations on a heavy-duty boring machine turntable, which solves the problems of incomplete protection, inconvenient use, difficult cleaning, and insufficient carrying capacity in the prior art.

The present invention provides a workpiece stocker with replaceable workpiece transfer tables.　Provided is a workpiece stocker with a replaceable pallet (11), the workpiece stocker including: a roller chain (13) looped in an oval shape around two sprockets; a drive motor that rotates one of the sprockets; and a plurality of workpiece transfer tables (3) lined up in the circumferential direction and mounted to the roller chain; and a control device that causes a designated workpiece transfer table from among the workpiece transfer tables, which move all together by control over the drive motor, to stop at a set position. Between the workpiece transfer tables and the roller chain, an attachment / detachment section is configured to allow detachment of the workpiece transfer tables from the roller chain. For example, the attachment / detachment section is configured such that coupling pins (55) that couple an outer link (52) and an inner link (51) constituting the roller chain are hollow in shape, and the workpiece transfer tables have formed thereon mounting pins (27) that can be inserted into the coupling pins.

A system and method for pressforming handles. The system broadly includes a carriage, a conveyor, a plate train, and a roller press. The conveyor assembly is mounted on the carriage and includes first and second sprockets rotatably supported on the carriage and a roller chain linking the sprockets together. The plate train is conveyably engaged with the roller chain and includes several plates. Each plate includes a flat portion and a number of pockets spaced from each other. The roller press is configured to rotate relative to the carriage and engage a web of shapable material opposite the plates of the plate train. The roller press includes several protrusions annularly and longitudinally spaced apart from each other and configured to press the shapable material into the pockets of the plates thereby forming bands of the handles.

The present invention relates to the technical field of step ladders, and specifically discloses a self-cleaning step ladder. The self-cleaning step ladder comprises a frame, on which a roller chain, a step and a driving member are installed, and a first groove and a second groove are provided on the frame, the driving member drives the roller chain to slide along the first groove, the step is rotatably connected with the roller chain through a first mounting shaft, and a second mounting shaft is installed on the step, a second roller is installed on the second mounting shaft, the second roller slides along the second groove, and an opening for cutting off the second groove is also provided on the frame; the self-cleaning step ladder is provided with an opening on the bracket, and racks are provided at the upper and lower parts of the opening, and the step is flipped by the restriction of the rack on the gear, so that the arc surface of the step corresponds to the cleaning component, so that the cleaning component can fully clean the tread surface and the arc surface of the step; by providing a pre-cleaning roller, a cleaning mechanism and a water wiping mechanism, the step can be wiped after cleaning.

The utility model relates to the technical field of roller chains, in particular to a roller chain for reinforced parking equipment, which comprises two groups of chain plates, through holes are formed in positions, close to two ends, of one sides of the two groups of chain plates, chain wheels are movably assembled in positions, close to two ends, of the inner sides of the two groups of chain plates, and oil filling pipes are inserted into the through holes. One end of each oil injection pipe is communicated with a flow dividing disc, a plurality of sets of lubricating holes are formed in one side of each flow dividing disc, oil injection holes are formed in the positions, close to the other ends, of the side surfaces of the oil injection pipes, and magnet blocks are installed at the positions, close to the outer sides of the oil injection holes, of the side surfaces of the oil injection pipes. Through the arrangement of the oil filling pipe, the flow dividing disc, the lubricating hole, the oil filling hole, the magnet block, the T-shaped groove, the T-shaped block, the magnet piece, the connecting plate, the cover plate and other parts, the problem that after an existing roller chain is used for a long time, part of the roller chain is likely to be astringent due to friction and abrasion between structures, and then follow-up use is likely to be affected can be effectively solved.

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.

A multi-layered guide rail integrated rigid chain and flexible conveyor patient transfer system and method includes a flexible conveyor belt mechanism, a rigid chain mechanism, and a toothed plate moving mechanism. The flexible conveyor belt mechanism includes a support plate. The rigid chain mechanism includes a support base and a roller chain. The support base includes a first guide rail and a sliding plate. The first guide rail is provided with a blocking arm. The support plate engages with a rolling assembly. The toothed plate moving mechanism includes a second reduction motor, a second transmission gear, a second guide rail, and a toothed plate assembly. The first and second guide rails, the toothed plate assembly, and the rigid chain mechanism form a dual guide rail mechanism. The multi-layered guide rail integrated rigid chain and flexible conveyor patient transfer system and method uses the toothed plate moving mechanism to move the support plate inside and outside the bed, and the rigid chain mechanism to precisely adjust the position of the support plate, improving the efficiency of short-distance movement.

The present application belongs to the field of machinery, and particularly relates to a side tensile rubber chain belt, which comprises a conveying belt, a driving chain and a chain connecting conveying belt piece. The conveying belt comprises a buckle side rubber chain belt, the buckle side rubber chain belt comprises a fixed chain link shaft rubber belt or a fixed ring chain rubber belt, the driving chain comprises a roller chain or a ring chain, the driving chain is connected with the conveying belt through the chain connecting conveying belt piece, the driving chain rotates to drive the conveying belt to convey materials, the buckle side rubber chain belt comprises a belt edge tensile piece, the belt edge tensile piece is connected with the chain connecting conveying belt piece in a split mode or in an integrated mode, the belt edge tensile piece is arranged in the fixed chain link shaft rubber belt or outside the fixed chain link shaft rubber belt, and the belt edge tensile piece is arranged in the fixed ring chain rubber belt or outside the fixed ring chain rubber belt.

The utility model discloses a pipe collecting device which comprises a material collecting frame, an inclined transition cross beam is arranged in the material collecting frame, the transition cross beam extends from the bottom corner of one side of the material collecting frame to the top corner of the other side of the material collecting frame, and a top roller chain is arranged on the surface, close to the bottom corner, of the transition cross beam. The top roller chain is driven by a driving mechanism; a first industrial wear-resistant rubber plate is fixed on the surface of one side, close to the vertex angle of the material collecting frame, of the transition cross beam; a second industrial wear-resistant rubber plate is fixed to the inner surface of the side, making contact with the transition cross beam, of the material collecting frame, one end of the second industrial wear-resistant rubber plate makes contact with the top roller chain, and the other end of the second industrial wear-resistant rubber plate makes contact with a kick-out device; according to the collecting device, the problems that the reworkable product pipes are scratched, collided and the like in the collecting process of the reworkable product pipes by a production line are solved; and by optimizing soft protection collection, noise caused by collision of a traditional collecting device and damage to the traditional collecting device due to collision can be greatly reduced.

This invention discloses a photovoltaic tracking bracket drive device and a photovoltaic tracking bracket. The photovoltaic tracking bracket drive device includes a column, a main shaft movably connected to the column, a first geared disc connected to the main shaft, a second geared disc connected to the column, a roller chain connected to the column, a gearbox assembly connected to the roller chain, and a motor connected to the gearbox assembly. The roller chain is disposed between the first and second geared discs, and a connecting rod connects the first and second geared discs. The roller chain meshes with both the first and second geared discs. This invention employs a opposed-type drive design to ensure stable meshing of the drive device during operation, distributing the load torque on both sides of the first and second geared discs, ensuring long-term stable operation of the photovoltaic tracking bracket drive device; at the same time, it can reduce the external size of the geared discs, making the structure more compact and reducing production and transportation costs.

Door drive (20) for one door leaf, comprising - a roller chain (24) driven by a motor (22), - a gear (26) that deflects the roller chain (24), - a locking unit (28) formed from - a drive unit (30) permanently connected to the roller chain (24), - a door connection (33) for connection with a door leaf, - a connecting element (32) extending along the roller chain (24), which is pivotably mounted at its first end via a first pivot bearing (34) on the drive unit (30) and at its second opposite end via a second pivot bearing (36) pivotably mounted on the door connection (33), wherein the locking unit (28) is arranged such that in a closed state both pivot bearings (34, 36) are arranged in an end position on the gear (26) on an equal circumferential half of the gear (26) and thereby assume an over-center position relative to each other with respect to a direction of movement of the roller chain (24) into an open position.

The invention relates to the field of livestock and poultry breeding equipment, in particular to a livestock and poultry cage chicken outlet mechanism which comprises a machine frame, a cage used for captive breeding of livestock and poultry is installed in the machine frame, a bottom net used for bearing the livestock and poultry is installed in the machine frame, the bottom net is located on the lower side of the cage, and the bottom net is in an annular shape. Chicken outlet rollers used for driving the bottom net to convey in a reciprocating mode are installed on the left side and the right side of the machine frame, the two chicken outlet rollers are sleeved with the bottom net, a motor used for driving the chicken outlet rollers to rotate is installed on the machine frame, opening and closing doors capable of opening or closing a cage inlet and outlet channel are installed on the cages, roller chains are installed on the front side and the rear side of the bottom net, and chain wheels are installed on the chicken outlet rollers. The roller chain is meshed with the chain wheel, a push rod is installed on the inner side of the ring of the bottom net, the chicken outlet roller comprises a base roller, and a shifting rod used for pushing the push rod is arranged on the base roller. According to the chicken outlet mechanism for the livestock and poultry cage, the labor cost is saved, manual intervention is reduced, and efficient and low-damage automatic cage outlet of livestock and poultry is achieved.

The invention relates to a furniture connecting fitting (10), in particular a hinge, preferably a hatch holder, which has a kinematic arrangement (30) with levers and links, and by means of which a door or a hatch can be moved from a closed position into an open position, at least some of the links (32.1, 32.2, 33.1, 34.2, 34.1, 35.1, 36.1) and the levers (31, 33, 34, 35, 36) form an roller chain which has at least one secured link (35.1, 36.1), the position of which remains unchanged when the roller chain is adjusted, wherein the roller chain has an attachment lever (31) which is connected directly or indirectly to the door or hatch, and wherein a holding device (40) is provided which is coupled to the roller chain with at least one spring element (43) to achieve a stable and compact design, provision is made in accordance with the invention that the retaining device (40) is coupled directly or indirectly to an actuator (37) via a swivel lever (42), and that an adjustment device (37.3) is provided, by means of which the force input point of the holding device (40) can be changed in a position of the roller chain by means of an adjustment element (37.4).

An article transport vehicle includes a travel unit; an article holder; two lift mechanisms each including a roller chain and configured to raise and lower the article holder; and a guide mechanism configured to guide the article holder in a lifting direction. The guide mechanism includes a guide rail held by the travel unit and extending along an up-down direction; a plurality of rollers configured to roll in contact with the guide rail; a roller support supporting the plurality of rollers, and a joint mechanism joining the roller support to the article holder. The plurality of rollers are disposed in such a manner as to restrict movement of the roller support in a first direction and a second direction while allowing the roller support to move in the up-down direction relative to the guide rail.

The utility model discloses a chain type rubber belt conveyor belt convenient to assemble and disassemble, which comprises a rubber belt, roller chains, spring steel belts, a spring connecting belt and a metal embedded part, the roller chains are arranged on both sides of the rubber belt, the roller chains on both sides are connected through a plurality of spring steel belts, and the spring connecting belt is connected with the rubber belt through a plurality of spring connecting belts. The rubber belt wraps the spring steel belt and is vulcanized and fixed into a whole, one end of the rubber belt is of a zigzag structure, a plurality of metal embedded parts are arranged in the zigzag structure and are wrapped and vulcanized in the zigzag structure, and the other end of the rubber belt is provided with an embedded structure matched with the zigzag structure with the metal embedded parts. And an elastic connecting belt is arranged at the saw-toothed joint part at the two ends, penetrates through the metal embedded part, is wrapped in a rubber belt and is vulcanized in the middle of the rubber belt. The spring steel band is arranged in the belt, the wedge-shaped connector at the tail end of the belt is connected through quick locking of the spring steel band and the metal embedded part, and disassembly is very convenient.

The invention relates to the technical field of chains, in particular to a marine complex environment resistant special precise roller chain for ships, which comprises a chain main body and an accessory for protection, the chain main body is formed by connecting a plurality of rows of single chains through long pin shafts, and the accessory comprises protective rings which are arranged on two sides of the chain main body and matched with the transmission shape of the chain. The protective ring is fixed through the top plate and the bottom plate; the roller chain further comprises a dynamic lubricating structure, the dynamic lubricating structure is integrated on the top plate and comprises an oil feeding box capable of releasing lubricating oil in a self-adaptive mode through gravity and an oil brush making contact with the chain body during oil feeding, and the surface of the chain is evenly coated with the lubricating oil through the oil brush. The lubricating oil recycling structure is arranged on the bottom plate and comprises a concentration groove for inclined flow guide, a recycling seat for gas pressurization and a guide pipe assembly capable of switching the flow direction, and the cam mechanism is synchronously driven through transmission of the chain main body; and the purpose of long-acting lubrication of multiple rows of chains in a marine environment is conveniently achieved.

The utility model provides double-layer protein bar pressing equipment. The utility model relates to double-layer protein bar pressing equipment which comprises a rack, a conveying mechanism and two groups of rolling mechanisms, wherein the conveying mechanism and the two groups of rolling mechanisms are arranged on the rack; the two rolling mechanisms are arranged in the feeding direction of the conveying mechanism in a spaced mode and matched with the conveying mechanism to achieve two-time extrusion on protein bar raw materials. The rolling mechanism comprises a supporting part arranged on the rack, a material pressing roller and a friction roller which are rotationally arranged on the supporting part, and a driving part arranged on the supporting part; and the driving part is in chain transmission connection with the material pressing roller and the friction roller respectively, so that the material pressing roller and the friction roller rotate in the same direction. The double-layer protein bar pressing equipment can improve the phenomenon that the product forming quality is poor due to the fact that raw materials adhere to the pressing rollers, and has the advantage of being high in product percent of pass.

The utility model relates to the technical field of container production lines, in particular to a lithium battery energy storage box and container roller chain transmission box shifting mechanism which comprises a bottom frame, a box shifting trolley, a chain pin, a roller chain, a supporting piece, a box shifting rod, two balancing weights, an ascending air cylinder and a descending air cylinder. The workshop area is saved; and the construction cost is reduced. The box shifting rod and the box shifting vehicle frame iron plate are attracted to keep the state and rotate clockwise to the descending position under the action of the balance weight during separation, the structure is simple, and maintenance is convenient. The box shifting rod is controlled to descend and ascend at the return position and the return ending position respectively, and box shifting operation is achieved through the roller chain. According to the box shifting device, full-automatic box conveying can be achieved, three to five boxes are arranged on each set of box shifting device production line, the safety of the production line is improved, and the problems that an existing box shifting mechanism for lithium battery energy storage boxes and container roller chain transmission is low in safety and the automation degree of the production line is low are solved.

A discharging, lifting and transferring device of an automatic bar sawing machine comprises a roller track A and a rotating bracket which are arranged on a track rack A. A servo motor B, a roller chain B and a roller B are arranged on the rotating bracket. The roller track C is arranged on the track rack C, and a servo motor C, a roller chain C and a roller C are arranged on the roller track C; a material blocking cylinder is fixed to the side wall of the foundation frame, and the end of a piston rod of the material blocking cylinder is fixedly connected with a piston rod baffle. A push plate cylinder is fixed to the side wall of the roller track C, the end of a piston rod of the push plate cylinder is fixedly connected with a push plate, and a waste slide carriage is arranged between the roller track C and the waste frame; the bottom end of the rotating bracket is fixedly connected to the upper end of the swing cylinder rotating body. Automatic operation is achieved through PLC control, manual intervention is not needed, and the production efficiency and the product quality are greatly improved.

The utility model provides a hardened crushing machine for bagged materials, and belongs to the technical field of crushing production lines. The problem that use is affected due to material hardening is solved. An extrusion conveyor and a vibration conveyor are sequentially arranged in the conveying direction of bagged materials, the extrusion conveyor comprises a first support, a second support, rubber hanging carrier rollers, a rubber hanging arc-shaped roller, a second speed reducer and a third speed reducer, and the first support is provided with a plurality of rubber hanging carrier rollers; a plurality of rubber coating carrier rollers are sequentially arranged in the conveying direction of bagged materials, the output end of the second speed reducer is connected with the rubber coating carrier rollers, the rubber coating carrier rollers are connected through a second roller chain, two second supports are arranged above the first support, a plurality of rubber coating arc-shaped rollers are arranged on the second supports, and the rubber coating arc-shaped rollers are arranged on the second supports. The output end of the third speed reducer is connected with a plurality of rubberizing arc-shaped carrier rollers, and a plurality of rubberizing arc-shaped carrier rollers are connected through a fourth roller chain. The rubberizing device is mainly used for breaking hardened material bags.

The application discloses a roller chain coupling oil storage protection device and belongs to the technical field of coupling protection. The device comprises two protective cover shells, which are sleeved on the outside of a coupling body and are detachably connected between the two protective cover shells. An inner concave arc groove is arranged on the inner side wall of the protective cover shell, and the cross section of the inner concave arc groove is trapezoidal. A positioning component and a lubricating component are arranged on the protective cover shell, and the positioning component is used for pre-positioning and fixing the two protective cover shells. The trapezoidal cross section of the inner concave arc groove can receive the lubricating oil thrown out by centrifugal force, guide the oil to gather and store, has good oil storage effect, reduces the oil supplement frequency and maintenance cost, and the positioning component has two-stage functions of pre-positioning and locking. In the pre-positioning state, the two protective cover shells can rotate around the coupling body in the circumferential direction as a whole, the lubricating component is driven to uniformly brush oil and lubricate the whole roller chain, the protective cover shells do not need to be disassembled, the process is greatly simplified, and the problems of oil stain dripping and low efficiency are avoided.

A novel closed-loop hydroelectric power generation device includes a frame, characterized by: an upper main shaft and a lower main shaft mounted on the frame; upper and lower sprockets correspondingly mounted on the upper and lower main shafts; roller chains wound around the upper and lower sprockets; connecting plates mounted on the roller chains; water storage hoppers mounted on the connecting plates; and flow guiding devices mounted on the water storage hoppers. A water source for filling the water storage hoppers is installed above the frame; a drive gear for power output is mounted at one or both ends of the lower main shaft, meshing with a pinion of an auxiliary power starting and parking device; the drive gear meshes with the input pinion of a gearbox, and the output shaft of the gearbox is connected to the input shaft of a generator; a water storage tank is installed at the lower part of the frame, serving as a circulating water source or directly connected to a drainage pipe. This invention has advantages such as low water consumption, high efficiency, no terrain limitations, and high output power, and is suitable for distributed new energy power generation.

Electric and muscle-powered bicycle drive system: arranged at the bottom bracket; the electric power transmission has two reduction stages, the first by gears and the second by roller chain or toothed belt, and between the two stages, a clutch engagement, disengagement, and parking lock device connected to the rear wheel, without a freewheel, allowing the motor to be driven by the rear wheel and to operate as a generator; the muscle power transmission has a continuously variable ratio device with pulleys and a belt in a closed and lubricated environment, the ratio being determined by the position of a hydraulic cylinder acting on the driven pulley and the belt tension by a spring acting on the driving pulley. The two transmission paths are independent. Figure for the abbreviation: Fig. 7

The application provides a high-efficiency heavy-load over-crossing transport trolley and a working method thereof, and relates to the technical field of metallurgical equipment maintenance. The device comprises a driving wheel device, a tensioning wheel device, a roller chain, a load-bearing support device, a lifting traction trolley and a position detection system. The direction close to the offline maintenance workshop is right, and the direction close to the online rolling workshop is left. The roller chain is arranged in the middle of the load-bearing support device. The load-bearing support device comprises a first steel rail and a second steel rail, and rolling mills are arranged on the first steel rail and the second steel rail. The load-bearing support device comprises a left trolley track and a right trolley track, and lifting traction trolleys are arranged on the left trolley track and the right trolley track. The position detection system is fixed to the outer side of the right trolley track. In the application, the rolling mills are cooperated with the lifting traction trolley and the position detection system through the bottom wheels of the rolling mills, so that the over-crossing transport function is realized. Compared with the traditional technology, the application avoids the risk of wheel fragmentation, and improves the transport efficiency and stability of heavy-load equipment.