36results about How to "Reduce polygon effect" patented technology

The invention relates to a method for reducing the polygon effect that occurs over the course of the reversing of a chain, which can be used for a pedestrian conveyor, especially an escalator or moving walkway. To this end, a different rotational speed is superimposed upon the rotational speed of the reversing wheel via the electric drive which indirectly or directly acts upon said reversing wheel.

The invention provides a tooth-shaped chain which comprises inner chain plates, outer chain plates, short pin shafts and long pin shafts, wherein the inner chain plate holes formed in the inner chain plates are circular holes or non-circular profile holes; a pair of tooth-shaped bulges is formed in each inner chain plate hole; the inner chain plate holes are divided into outer side slots and inner side hole grooves through the bulges; the short pin shafts are axially positioned through the bulges and the outer side slots, and are fixed together with the inner chain plates in an interference fit manner; multiple inner chain plates are overlapped to form an inner link; the long pin shafts penetrate through the inner side hole grooves of the inner chain plates and are riveted together with the two outer chain plates tightly to form an outer link; the short pin shafts of the inner link is in contact with the long pin shafts of the outer link through arc working surfaces to form a rotation pair which can rotate within a certain range. According to the tooth-shaped chain provided by the invention, the structural constraints of the conventional tooth-shaped chain and Hy-Vo tooth-shaped chain are broken through, the friction loss and impact vibration between the pin shafts and chain plates are reduced by changing the assembling mode of the pin shafts and the arrangement mode of the inner chain plates, and the mechanized and scale production of high-speed tooth-shaped chains is achieved.

A drive system for an escalator or a moving walkway includes at least one drive motor, at least one drive chain and a reversing element for the drive chain. A device for modifying the speed of the drive chain is arranged in at least an entry or exit area of the reversing element.

The invention discloses a low-torque diamond drill bit, and belongs to the field of drilling. The low-torque diamond drill bit comprises a drill bit body, multiple blades which stretch from the drillbit body or are fixed to the drill bit body, water holes or spray nozzles and passageways. At least one blade is provided with hanging cutting teeth, at least one blade is only provided with a normalwheel unit, or bases and/or a base stretching from the blade are/is arranged at the front end and/or the rear end of the at least one blade, and normal wheel units are arranged on the bases. The working torque of the drill bit under complex working conditions can be remarkably reduced, overloading or premature failure, caused by too high torque of the drill bit, of the drill bit and matching toolsis reduced, the working stability of the drill bit is improved, and the service life of the drill bit is prolonged. Especially, during directional drilling, by means of the low-torque PDC drill bit,the adjusting time of tool surfaces during directional sliding drilling can be shortened.

The invention discloses a mute drive chain system for motorcycle rear drive transmission, and relates to the technical field of motorcycle chain transmission. The mute drive chain system comprises a small chain wheel, a large chain wheel and a mute drive chain, and the mute drive chain is a tooth-shaped chain and comprises an outer chain plate, an inner chain plate, a guide plate, a pin shaft, a sleeve and a damping seal ring; the sleeve is in interference fit with mounting holes of the inner chain plate and the guide plate and forms an inner chain link together with the inner chain plate and the guide plate, the pin shaft penetrates through the sleeve and is in clearance fit with the sleeve, two ends of the pin shaft are in interference fit with mounting holes of the outer chain plate and form an outer chain link together with the outer chain plate, and the damping sealing ring is arranged between the outer chain link and the inner chain link. Through innovative design of the mute drive chain and the chain transmission system of the motorcycle, the technical limitation of traditional chain transmission is overcome, the stability and low noise of the chain transmission system can still be kept when the motorcycle moves violently at a high speed, the requirements for individuation, low noise and high abrasion resistance of high-end motorcycles are met, and dangerous accidents can be effectively avoided.

In order, e.g., to provide a line sorter in which acoustic noise resulting from the polygon effect is reduced, there is disclosed a sorter (102) for sorting items of various shapes, sizes and weights, such as postal parcels or airport baggage. The sorter includes a closed loop comprising a plurality of sorting carts (302) for moving along an upper track section, a lower track section and end track sections in a moving direction. The plurality of carts are coupled at couplings (312), which enable the carts to pivot relatively to each other in at least one plane when in operation. Each cart is able to pivot relatively to an adjacent cart at two or more pivot points (404, 414, 1002) where the two or more pivot points are positioned a pivot point distance greater than zero apart in the moving direction of the carts.

The invention relates to a unidirectional high-precision meshed-transmission toothed chain board for conveying chains, and belongs to the field of chain transmission. The chain board has double circular pitches on a meshing line, each chain board body has three teeth, and a tooth profile 11 of the first tooth belongs to linear tooth profiles, wherein the apothem of the first tooth belongs to the apothem f of the chain board of a standard toothed chain; a tooth profile 18 of the third tooth also belongs to the linear tooth profiles, and the apothem f1 of the third tooth is 0.96-0.98 time of the apothem f of the chain board of the standard toothed chain; a tooth profile 17 of the third tooth belongs to non-working random-curve tooth profiles, a tooth profile 16 of the second tooth belongs to the linear tooth profiles, and the tooth form half-angle of the second tooth is alpha1/2; a tooth profile 13 of the first tooth and a tooth profile 14 of the second tooth are convex curves, and the protrusion amount delta is about 0.01f-0.03f. The unidirectional high-precision meshed-transmission toothed chain board for the conveying chains has the advantages that the chain board is small in weight, and directional transmission, meshing and positioning can be conducted on different tooth profiles; the whole meshing processes are smooth, erosion of the positioning tooth profiles, vibration impact and noise are small, the positioning precision is high, and the chain board is particularly suitable for conveying accessories in automatic production lines.

A polygon compensation coupling system for reducing a polygon effect in a chain driven system is disclosed. The polygon compensation coupling system may include a chain sprocket and a main drive in engagement with the chain sprocket, such that the engagement defines a compensation curve to reduce the polygon effect.

The transport device especially for transporting flat substrates through a coating installation comprises a plurality of transporting rolls, which are arranged transversely in relation to the transporting direction, and supporting rolls are also provided.

The invention relates to a novel CVT gearbox which comprises a drive wheel movable disc, a drive wheel fixed disc, a driven wheel movable disc, a driven wheel fixed disc and a mute chain. The mute chain comprises a chain plate, bent pin shafts and short pin shafts. A through hole is formed in the chain plate. One set of pin shafts are inserted in each of the two ends in the through hole in a penetrating manner, and each set of pin shafts comprise one bent pin shaft and one short pin shaft, wherein the bent pin shaft is attached to the short pin shaft, and an opposite rolling face is formed by the side faces of the attached sides. The inclination angle of the arc face of the bent end of each bent pin shaft ranges from 17 degrees to 23 degrees, the inclination angle of the arc face of the straight end of each bent pin shaft ranges from 1 degree to 3 degrees, the curvature radius of the arc face of the bent end of each bent pin shaft ranges from 100 mm to 170 mm, and the curvature radius of the arc face of the straight end of each bent pin shaft ranges from 150 mm to 200 mm. The mute chain is provided with the two kinds of pin shafts, the arc faces of the two kinds of pin shafts conduct the pure rolling movement in the transmission process, the function of pitch changing is achieved, the vibration and noise of the chain are lowered, and the chain transmission efficiency is improved.

The invention discloses a novel silent chain and a tensioning device of the novel silent chain. The novel silent chain is composed of a circular pin silent chain, a driving chain wheel, a driven chain wheel, an upper tensioning guide rail device and a lower tensioning guide rail device. The circular pin silent chain is arranged on the driving chain wheel and the driven chain wheel in a surrounding mode. The upper tensioning guide rail device and the lower tensioning guide rail device are arranged at the upper end and the lower end of the circular pin silent chain correspondingly. The inner side convex tooth profile and the outer side tooth profile of a chain plate are both involute profiles, conjugate engagement between the chain plate and an involute chain wheel is achieved, engagement impact is reduced, stability of silent chain movement is greatly improved, and the silent chain transmission ratio is more accurate. A novel inner and outer composite engagement mechanism is adopted for the chain plate and the chain wheel, and the polygon effect and engagement impact between the chain plate and wheel teeth of the chain wheel are reduced; a combined way of a guide rail box and rollers is adopted for the upper tensioning guide rail device and the lower tensioning guide rail device respectively, the defect that vibration is large before the silent chain is engaged with the chain wheel is overcome through the guide rail boxes, the rollers make rolling contact with the silent chain, and friction force is reduced.

The invention discloses a universal tool clamp for heat setting of a metal intravascular stent. The universal tool clamp is used for expanding the size of the metal intravascular stent. Comprising a fixed base, a fixed conical supporting block, a supporting rod, a positioning supporting rod supporting frame, a supporting rod supporting frame, a sliding conical supporting block, a supporting rod limiting strip, a sliding base, a pin and a nut. The metal intravascular stent is arranged on the supporting rod in a sleeving mode, the distance between the two conical supporting blocks is changed through movement of the nut in the direction from the guide rod to the fixed conical supporting blocks, then the supporting rod is made to move outwards in the radial direction, expansion of the intravascular stent is achieved, and the size of the stent can be determined through the supporting rod limiting strips. Step-by-step expansion of metal intravascular stents of various sizes can be achieved through the supporting rod limiting strips of different sizes; the non-destructive expansion of the metal intravascular stent can be realized, the composition is reasonable, the operation is convenient, the process is simple, the step-by-step expansion of the metal intravascular stents with various sizes can be realized only by replacing the stay bar limiting strips with different sizes, and the clamp does not need to be frequently disassembled, assembled and replaced.

The invention provides a tooth-shaped chain for high-speed transmission of a novel meshing mechanism. The tooth-shaped chain comprises a tooth-shaped chain plate and a guide plate which are connected together through pin shafts, wherein the tooth-shaped chain plate is formed by combining any two of an outer meshing chain plate, an inner-outer composite meshing chain plate and an inner meshing chain plate. According to the tooth-shaped chain, the polygonal effect is relieved, and impact, vibration and noise are reduced, so that transmission is steadier, and the smoothness under the high-speed transmission is greatly improved; the tooth-shaped chain is particularly suitable for high-speed, speed-variable and load-variable chain transmission systems such as an automobile, a motorcycle and an airplane.

The invention discloses an asymmetrical tooth profile chain two-phase transmission system which is composed of a first hanging chain, a second hanging chain, a first driving chain wheel, a second driving chain wheel, a first driven chain wheel and a second driven chain wheel. The first driving chain wheel, the first driven chain wheel and the first hanging chain are meshed to form the first single-phase transmission system. The second driving chain wheel, the second driven chain wheel and the second hanging chain are meshed to form the second single-phase transmission system. During installation, a half tooth profile angle is formed between the first driving chain wheel and the second driving chain wheel, and a half tooth profile angle is formed between the first driven chain wheel and the second driven chain wheel. On the basis of the two-phase superposition principle and the corresponding coordination relation, two-phase transmission can obviously reduce the vibration and impact caused by the polygon effect, the noise of the transmission system is reduced, and the whole performance of the tooth profile chain two-phase transmission system is effectively improved.

The invention relates to a crawler-type running gear, especially for excavators with an operating weight of more than 200 tons, the running gear has a drive wheel (3), a guide wheel (2), a plurality of crawler wheels (4), a plurality of carrier wheels ( 5) and an endless chain formed by a plurality of hingedly interconnected track shoes (7), wherein the drive wheels (3) have laterally projecting tooth profiles (13'), the track shoes (7) ) has vertically projecting teeth (13) extending parallel to each other, which engage into the tooth profile (13') when the track shoe (7) is turned around the drive wheel (3), wherein the The crawler shoes (7) form separate running surfaces (10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, between the teeth (13) for the crawler wheel (4) and the carrier wheel (5), and for the guide wheel (2) and the driving wheel (3). 11, 12) in such a way that the running surfaces (10) for the track wheels (4) and carrier wheels (5) are substantially rectilinear and for the guide wheels (2) and drive wheels (3) The running surfaces (11, 12) are curved.

A modular conveyor (1) comprising a conveyor mat or chain (2) consisting of a succession of segments (3) hingedly connected together to form an endless loop, arranged around two spaced apart deflection wheel units (4, 5) Cycle. Each segment is positioned at a pitch from an adjacent segment that is at least substantially the same throughout the conveyor mat or conveyor chain. At least one of the diverting wheel units (5) comprises a drive shaft (9), a drive wheel (10) mounted on the drive shaft and drivingly engaging the conveyor mat or conveyor chain, and also an upper idler wheel mounted on the idler shaft (12). The upper idler shaft is positioned above the drive shaft such that the intermediate distance between the upper idler shaft and the drive shaft is equal to the distance of (n pitches + approximately 1/2 pitch).