80 results about "Roller chain" patented technology

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.

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.

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.

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 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.

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.

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 invention discloses a hand brake and a braking method thereof. The hand brake comprises a hand wheel, the hand wheel is in transmission connection with a driving shaft assembly through a reinforcement device, the driving shaft assembly is in meshing transmission with a chain rolling shaft assembly, the chain rolling shaft assembly is in transmission connection with a chain, one end of the chain is fixedly connected with a vehicle body, and the other end of the chain is connected with a brake device of the vehicle body. The shell assembly and the base assembly are connected through a fastener, and a cavity used for containing the driving shaft assembly and the roller chain shaft assembly is formed between the shell assembly and the base assembly. In the braking step, the hand wheel is rotated, the input force is amplified by the boosting device and then transmitted to the rolling chain shaft assembly through the driving shaft assembly, and the chain assembly is driven to be tensioned to achieve braking. Operation intensity of the hand brake can be reduced, output force and stability of the output force can be improved, the problem of easy rusting failure is solved, then hand brake parking capacity and reliability of the railway wagon are improved, and accident risks caused by parking brake failure are reduced.

The invention is a roller chain for bicycles, comprising a plurality of links (10, 20) hinged to one another in such a way that each link (10, 20) rotates with respect to the adjacent link (10, 20) around an axis (X), and wherein each link (10, 20) comprises at least one plate (100) consisting of a body (110) with two opposite ends (120, 130), in each of which there is a seat or hole (140) for the insertion of a connection pin (11). Said plates are made of spring steel and are elastically deformable in such a way that the distance between said two ends (120, 130) can vary as a result of the effort normally applied while pedalling.

The utility model provides an automatic lens strengthening line cleaning mechanism which comprises a cleaning frame, the cleaning frame is provided with a plurality of lifting baskets, a transmission assembly, a plurality of cleaning pools and an automatic up-and-down hook assembly, and the lifting baskets are used for containing lenses; the rotating assembly comprises two first roller chains, a plurality of fixing rods and a driving device; and rotating gears are installed at the four corners of the two side walls of the inner side of the cleaning frame correspondingly, and the driving device is used for driving the rotating gears to rotate. The driving device is used for driving the rotating gear, so that the roller chain and the fixed rod on the roller chain are driven to rotate, and the continuous and stable movement of the lens lifting basket in the cleaning frame is realized; the efficiency of transferring the lenses among different cleaning pools is improved, the complexity and errors of manual carrying are reduced, and the smooth proceeding of the production process is ensured.

The invention discloses a continuous blanking tool for roller chain plate stamping, and belongs to the technical field of roller chain plate stamping. The device comprises a machine base arranged below a punching machine head, a female die aligned and matched with the punching machine head is fixedly arranged on the machine base, sliding grooves used for guiding a roller chain plate are symmetrically formed in the two sides of the machine base, and a material conveying mechanism used for driving the roller chain plate to move is arranged on the machine base in a sliding fit mode. The driving mechanism is used for driving the material conveying mechanism to move; the material conveying mechanism comprises a moving frame matched with the driving mechanism, the driving mechanism can drive the moving frame to move in the extending direction of the sliding groove, automatic telescopic rods are arranged on the two sides of the moving frame in a matched mode, a push plate is fixedly arranged at the output end of each set of automatic telescopic rods, and the automatic telescopic rods can drive the push plates to move downwards. When the device is used, the chain plate can be conveyed from the female die to the sliding groove and then pushed out of the sliding groove to fall into the bearing box, left-right reciprocating carrying is conducted, and the process is coherent and efficient.

The present application relates to logistics track technical field, specifically to a kind of ultra-low elevation rotary ring shuttle lane switch track device, including reciprocating rotary disc assembly, the reciprocating rotary disc assembly is provided with butt joint curved rail and butt joint straight rail, the reciprocating rotary disc assembly includes platform frame and sector support frame, the platform frame one side is fixedly connected sector support frame, the bottom of platform frame is equipped with universal wheel assembly.The sector support frame is provided with rotary drive assembly on one side.Rotary drive assembly drives driving sprocket to rotate, driving sprocket drives single-row roller chain to rotate along the arc trajectory of sector support frame, sector support frame drives platform frame to rotate, the universal wheel assembly installed below platform frame rolls in the track preset of support raceway plate assembly, platform frame top is fixed with butt joint curved rail and butt joint straight rail, can drive the butt joint straight rail and butt joint curved rail fixed on platform frame top, can realize switch track action by driving assembly transmission.

The utility model belongs to the technical field of roller chain machining, particularly relates to a length-fixed cutting-off positioning tool for cutting off a pin shaft of a roller chain, and provides the following scheme that the length-fixed cutting-off positioning tool comprises a working table, a positioning pushing mechanism and an auxiliary length-fixed mechanism, and the positioning pushing mechanism and the auxiliary length-fixed mechanism are installed on the working table. A plurality of rolling shafts are rotationally arranged on the side wall of the opening, and the positioning and pushing mechanism comprises a motor, a lead screw, a pushing part, a pressure applying part, a limiting part and a sliding rail. According to the device, two raw materials for manufacturing the pin shaft can be cut at the same time through one cutting machine, cutting and length fixing are automatically achieved, the cutting efficiency is effectively improved, the raw materials can be conveniently limited through the pushing part, the pressing part and the limiting part, and meanwhile pushing and fixed-length cutting are convenient.

Electric bicycle drive unit: mounted on the bottom bracket, connected to the rear wheel by an independent track parallel to the bottom bracket, and without a freewheel, allowing the motor to be driven by the rear wheel and operate as a generator; Between its two reduction stages, the first by gears and the second by roller chain or toothed belt, it features a clutch, disengagement, and parking lock mechanism; Controlled by a computer that defines the assistance and regenerative braking levels, clutch engagement, disengagement, and locking based on information from: speed sensors, battery charge level, requested assistance level, braking level, incline, ignition key presence and activation, and the position of the sliding sleeve control fork. Figure for the abbreviation: Fig. 1

The invention discloses spiral winding construction equipment for square culvert pipeline repair, and belongs to the technical field of square culvert pipeline repair construction equipment.The spiral winding construction equipment comprises a supporting frame surrounding a whole circle, a whole circle of walking roller chain is installed in a peripheral rail groove of the supporting frame, at least one machine head unit is loaded on the walking roller chain, and the machine head unit drives the roller chain to walk along the rail groove and drives the roller chain to walk along the rail groove; the strip-shaped profile is spirally wound to form a repaired pipeline; the walking roller chain is composed of a plurality of units, each unit comprises a walking roller, a rail rolling shaft and a telescopic frame, rail rollers of the rail rolling shafts are matched with the rail grooves, and the walking rollers roll on the inner wall of the winding pipeline. The rail groove is divided into a linear section and a turning section, a limiting flange is arranged on the edge of the side vertical wall of the linear section, and the turning section is not flanged. According to the equipment disclosed by the invention, through a rail groove structure in which the linear section is provided with the limiting turnup and the turning section is not provided with the limiting, and a multi-machine-head driving system, smooth operation and efficient repair of the walking roller chain in the square culvert pipeline are realized, clamping stagnation is effectively prevented, and the construction efficiency is improved.

This invention relates to a roller chain (10) for a circulating rolling module (20) for offshore applications. The roller chain (10) includes a plurality of rollers (11), each mounted on a shaft (12). The rollers (11) are free to rotate relative to their associated shafts (12). The cylindrical inner surface (112) of the rollers (11) and the outer surface (121) of the shafts (12) define sealed cavities (15) filled with lubricating fluid. Each shaft (12) is rotatably locked together with at least one associated link (13) by a rotational locking device (16).

A large animal lifting and moving apparatus includes a frame having a front end and a rear end, the frame, a drive shaft rotatably coupled to the frame, a drive motor coupled to the frame and operatively coupled to the drive shaft; the drive motor selectively powered by a power source, and one or more roller chains coupled to the drive shaft. The frame is structured to support a large animal between the front end and the rear end and structured to be moved during operation of the large animal lifting and moving apparatus. When the drive motor is powered by the power source, the drive motor drives the drive shaft and the roller chains coupled to the drive shaft.

The utility model discloses an elevator cage electric cage curtain door with a balance weight mechanism. The elevator cage electric cage curtain door comprises inner pulleys and outer pulleys, wherein the inner pulleys are mounted on a cross beam and located on the outer sides of side chain wheels, and the outer pulleys are located on the outer sides of the inner pulleys. A balancing weight capable of sliding up and down is installed in a guide rail groove of the vertical guide rail, a rope connected with the balancing weight bypasses the outer pulley and the inner pulley on the side where the rope is located and penetrates into rope holes in the first transverse rod to the nth transverse rod from top to bottom, and the other end of the rope is connected with the nth transverse rod. The lifting weight of the cage curtain door is changed by adopting a method of increasing the balance weight, and the load of the motor is reduced. A rope used for lifting the cross rod is a short-pitch roller chain and has the advantages of being higher in corrosion resistance, larger in bearing pulling force, higher in reliability and the like; the elastic deformation of the roller chain is small, and the roller chain is stacked more smoothly during winding, so that the two sides of the curtain door cross rod can be ensured to be synchronous during lifting, and the curtain door cross rod is not easy to block.

A large-speed-ratio chain transmission photovoltaic panel cleaning robot belongs to the technical field of photovoltaic, walks on a photovoltaic module for cleaning and comprises a case, walking wheels and a brush roller are arranged on the lower portion of the case, the walking wheels are located on the front side and the rear side of the lower portion of the case, and the brush roller is located in the center of the lower portion of the case. A duplex chain wheel driven by a driving motor is arranged in the machine box and comprises a large duplex chain wheel and a small duplex chain wheel which rotate coaxially, the large duplex chain wheel drives a small brush roller chain wheel through a first chain, the small brush roller chain wheel drives a brush roller, and the small duplex chain wheel drives a large walking wheel chain wheel through a second chain. The walking wheel large chain wheel drives walking wheels on the lower portion of the machine box. The sweeping robot is novel in conception and ingenious in design, the speed ratio of the walking wheels to the brush roller can be increased, the sweeping capacity of the brush roller when the sweeping robot moves is effectively improved, and the photovoltaic panel is swept more thoroughly.

The utility model discloses a cross chain driving corner conveying device which comprises a driving machine frame, a first cover plate is installed on one side of the top end of the driving machine frame, a second cover plate is installed on the other side of the top end of the driving machine frame, and a driven shaft assembly is installed at the position, located on the first cover plate, of the driving machine frame. A driving shaft assembly is installed on the portion, located on the second cover plate, of the driving rack. The cross-shaped connection driving corner conveying device has the advantages that the first adjusting assembly and the second adjusting assembly are installed on the driving machine frame, so that when the cross-shaped connection driving corner conveying device is used, the distance between the driving shaft assembly and the driven shaft assembly can be adjusted according to actual use requirements; the conveying angle of the double-row sleeve roller chain can be adjusted conveniently, it is ensured that the conveying device can be matched with various types of conveying rails, meanwhile, abrasion of products during corner conveying is reduced, the use flexibility of the conveying device is better, and efficient conveying of the products is facilitated.

The application relates to a non-powered connection suitable for a line transition section and relates to the field of conveying devices, which comprises a front section power plate chain and a rear section power plate chain, the front section power plate chain comprises a plurality of front plate chain units arranged along the conveying direction of the conveying line; the rear section power plate chain comprises a plurality of rear plate chain units arranged along the conveying direction of the conveying line; a plurality of support frames are fixedly installed between the front section power plate chain and the rear section power plate chain, one end of the support frame is located between two adjacent front plate chain units, and the other end of the non-powered connection is located between two adjacent rear plate chain units; a support plate is fixedly connected to the top of the support frame, a roller chain is rollingly installed on the support plate, and the top surface of the roller chain is flush with the top surface of the front plate chain unit and the rear plate chain unit; and a support structure for supporting the roller chain is installed at the bottom of the support frame. The application can reduce the friction of the non-powered section and ensure smooth transition of materials.

According to the square culvert pipeline repairing construction system and method, the distance and angle of the walking rollers of the walking roller chain are adjusted through the innovatively-designed adjusting device in the spiral winding equipment, so that the matching tightness degree of the walking roller chain and the track frame is proper, the movement track directions of all the walking rollers are kept consistent, and the repairing efficiency is improved. Therefore, the walking roller chain can run smoothly, and it is ensured that a high-precision lining pipe can be wound in a large-size square culvert pipeline. According to the square culvert pipeline repairing construction system and method, through the supporting device for internal and external combined supporting, a newly-wound lining pipeline is stabilized, the newly-wound lining pipeline and an old pipeline are anchored to guarantee positioning and centering, and conditions are created for high-quality grouting. And the construction efficiency of square culvert pipeline repairing and the quality reliability of a final repairing body are remarkably improved.

The utility model discloses a transmission mechanism that space utilization is high relates to chain drive technical field. The utility model discloses a roller chain and at least one support frame, and the roller chain includes first subchain main body, second subchain main body and the combination assembly, and the support frame is through with guide groove and first cut groove, and the space of guide groove and first cut groove is linked together, and first subchain main body and second subchain main body slide in the guide groove, and the combination assembly slides in the first cut groove. The utility model discloses a roller chain that first subchain main body and second subchain main body are set up, and the combination of support frame, guide groove, first cut groove, second cut groove and bottom groove solves the droop problem when chain and horizontal plane are relatively parallel operation, realizes the complex path such as snakelike, can adapt to small space, high complexity's layout scene, and the material quality that roller chain adopts is not dependent on the grease, and the lubrication is stable under high temperature, and low temperature is not easy to brittle fracture.

The application provides a flexible roller chain conversion to rigid connection push-pull device, belongs to mechanical transmission technical field, including speed reducer and the operating mechanism installed below the speed reducer, the operating mechanism includes drive assembly and push-pull assembly;The drive assembly includes fixed frame, coupling sleeve, key body, shaft body, bearing and connecting body, the left side of the speed reducer is equipped with fixed frame, and the bottom of the speed reducer is equipped with coupling sleeve;The flexible roller chain conversion to rigid connection push-pull device provided by the application, when using, the guide block can rotate in the interior of the device through the top rivet pin, in the use process, the guide block is pressed to move left by the clamping column, then is inserted into the interior of the guide slot on the left side, the guide block arranged in sequence is inserted into the guide slot on the left side under the action of the clamping column in turn, when the roller chain disc rotates to 360 °, the roller chain mechanism is all stretched out, at this time, the stretched out roller chain mechanism forms relatively rigid connection, realizes the conversion of flexible to rigid.

The utility model relates to the technical field of kelp processing, solves the technical problems that an existing kelp drying device is low in automation degree, consumes manpower, is low in efficiency and cannot meet the requirement for large-batch drying operation, and provides a chain type conveying device which comprises a first supporting seat, a first roller chain, a driving device, a first driving chain wheel, a first driven chain wheel and a first track. The first driven chain wheel is rotationally connected with the end of the first supporting seat, the first roller chain is connected between the first driven chain wheel and the first driving chain wheel, the first rail is fixedly connected with the top of the first supporting seat, a center through hole is formed in the first supporting seat, and the lower portion of the first roller chain penetrates through the center through hole of the first supporting seat. The upper portion of the first roller chain is located above the first track, the first roller chain is provided with a roller, the roller on the upper portion of the first roller chain makes contact with the top face of the first track, and the driving device is used for driving the first driving chain wheel to rotate.

The utility model discloses a large -scale workstation numerical control corner mechanism, including servo corner motor, rotary workstation, precision chain, chain tensioning adjusting mechanism and corner locking oil cylinder, servo corner motor drives rotary workstation through precision chain, and chain tensioning adjusting mechanism adjusts chain pre -tightening force in real time, and corner locking oil cylinder is used for locking workstation position, the precision chain is double -row roller chain, and the pitch error is less than or equal to 0.02mm, and the surface is carburizing hardening treatment, the rotary workstation bottom is equipped with annular guide rail, and annular guide rail surface coats wear -resistant ceramic coating. The utility model discloses, when using this large -scale workstation numerical control corner mechanism, the mechanism precision chain drive combines pre -tightening force adjusting mechanism, eliminates transmission gap, and transmission rigidity promotes more than 40%, and corner locking oil cylinder realizes millisecond level quick locking, and positioning repeat accuracy reaches plus or minus 0.001 DEG, and modular design is convenient for maintenance, and chain replacement time shortens to 30 minutes within.

Energy chains for guiding lines, such as cables, hoses or the like. In roller chains, rollers are provided on at least some chain links for moving the energy chain in a rolling manner, in particular on chain links of the opposite run, the rotational axis of one roller in each case coinciding with the common pivot axis of a pair of side parts of the chain links. Each of the two strands consists of alternatingly successive first and second side parts, wherein the first side parts are forked with two fork regions which oppose each other in the longitudinal direction and each have a pair of laterally spaced side walls with a plate receptacle therebetween, and wherein the second side parts are plate-like with two plate regions which oppose each other in the longitudinal direction and each engage in a plate receptacle of an adjacent first side part.

The utility model relates to the technical field of chain production, and provides a roller chain production riveting device which comprises a guide wheel used for guiding a roller chain to enter a riveting channel, the guide wheel comprises a rotary shell, and an adjusting mechanism is arranged in the rotary shell; the adjusting mechanism comprises a rotating disc, a plurality of driving connecting rods surround the periphery of the rotating disc in an array mode, pushing blocks are arranged at the other ends of the driving connecting rods, the two ends of the driving connecting rods are hinged to the rotating disc and the pushing blocks respectively, and guide sliding grooves are formed in the bottoms of the pushing blocks and matched with guide rails fixed to the rotating shell. Adjusting teeth are fixed to the pushing block, penetrate through the side wall of the rotary shell and can penetrate into a gap between every two adjacent rollers of the roller chain. The guide wheel has the beneficial effects that the pitch of the guide wheel can be changed by utilizing the adjusting mechanism, so that the production requirements of roller chains with different specifications and different pitches can be met.