摘要:
A garage door operator includes a head unit held by a supporting structure remote from the garage door. A rail has a first end held by a supporting structure adjacent the door and a second end fixed adjacent to and in alignment with a toothed drive wheel carried by the head unit. The garage door operator further includes an endless drive belt assembly trained about the drive wheel and a pulley held by the rail adjacent the garage door. The belt assembly includes a length of a plastic belt having teeth on one surface thereof matching the teeth on the drive wheel. The belt assembly further includes a trolley for connection to the garage door and a connector for joining one end of the plastic belt to one end of the trolley. The plastic belt has a lower surface to which the belt teeth extend, and the drive wheel has an upper surface to which the wheel teeth extend. Thus, the belt assembly can be installed by moving the plastic belt lower surface over the drive wheel upper surface until the respective sets of teeth are aligned, and moving the belt downwardly to train it about the drive wheel.
摘要:
A drive belt for a linear motion drive system in which a plurality of drive belts are helically disposed and rotated about a driven element to axially advance the element along its axis. The belts include a pair of spaced legs which resiliently abut legs of adjacent belts to equally space the belts about the periphery of the driven element. The legs also are adapted to accommodate changes in diameter of the driven element.
摘要:
A drive belt for a linear motion drive system in which a plurality of drive belts are helically disposed and rotated about a driven element to axially advance the element along its axis. The belts include a pair of resilient legs which operate to equally space the belts about the periphery of the driven element. The resilient legs also are adapted to accommodate changes in diameter of the driven element.
摘要:
A load block for a metal chain belt comprising upper and lower transverse struts, the ends of which are adapted to engage the flanges of the pulleys of a pulley transmission, said struts being joined by recessed end portions, the struts and end portions defining a window for encircling a carrier, the end portions being recessed from the ends of said struts so as not to engage the flanges of the pulleys of a pulley transmission.
摘要:
A metal drive V-belt has a prefolded portion forming a plurality of abutting drive blocks. The drive blocks have longitudinally aligned lateral slots in which are disposed circumferentially extending radially abutting nested continuous metal band members. The metal band members maintain the drive blocks in a continuous loop. The slots have smooth radius corners to provide stress relief. The radial innermost of the nested bands have a chamfer formed on the inner edges thereof and a longitudinally extending locking bead which mates with the next radial outermost continuous band.
摘要:
An endless power transmission belt having a toothed compression section and method of making the same are provided, the belt being formed substantially of polymeric materials and comprising a tension section, a compression section, and a load-carrying section disposed between the tension section and the compression section and having a transverse centerline, the compression section having an outer layer and an inner layer joined to the outer layer and defining an interface therewith that is substantially uniformly spaced from the load-carrying section by the outer layer throughout substantially the entire width and length of the belt. The compression section has an inner surface in the form of alternating transverse teeth and grooves with the grooves respectively defining the roots of the teeth. The inner layer of the compression section is softer than the outer layer thereof and the roots of the teeth are spaced inwardly from the interface of the layers so that the root of each tooth is spaced from the interface of the layers a distance that is approximately 25% of the distance of that tooth from the centerline of the load-carrying section whereby the inner layer tends to prevent cracking of the belt in the toothed area thereof.
摘要:
A method of making an arched endless belt and belt made employing the method are provided wherein the method comprises the steps of disposing in tubular form a plurality of uncured belt-defining layers with the layers being adapted to define corresponding sections of the belt and curing the layers in a controlled environment to define the belt having a longitudinal axis and an arched configuration relative to the axis wherein prior to the disposing step the method comprises wrapping a shaping material consisting of an uncured gum material around a belt building device and the disposing step comprises wrapping the plurality of layers against the shaping material so that during the curing step the shaping material and controlled environment cooperate to define the arched configuration of the belt including all of its layers and during the curing step the shaping material is bonded to the layers and comprises an inner portion of the belt with the cured gum shaping material serving as a crack barrier for such inner portion.
摘要:
The invention relates to a belt and pulley transmission which is preferably but not essentially an infinitely variable transmission. The belt is formed from a stack of individual blocks working in compression and supported on one or more support bands. According to the invention, the blocks are formed from sintered metal material, while the bands which support and compress the blocks are made from aramide fibres, such as KEVLAR. Every tenth block is of sintered bronze, to reduce the risk of seizing, the remaining blocks being of sintered iron.
摘要:
A method of making a ribbed belt having a plurality of longitudinally extending ribs is provided, wherein a vulcanized belt sleeve is put into one mandrel or said belt sleeve laid over two mandrels and cut with a milling attachment combining multiple double angle milling cutters in such a manner that the rotation of the milling attachment is opposed to that of the mandrel and the revolution speed of the milling attachment is greater than that of the mandrel, thus precisely defining a ribbed section of the belt in a simultaneous manner.
摘要:
An endless power transmission V-belt construction and method of making the same are provided, the belt construction being formed mainly of polymeric material and having rounded top and bottom teeth respectively extending along the length of the top and bottom surfaces of the belt construction, the belt construction comprising a tension section having the top surface, a compression section having the bottom surface, and a load-carrying section disposed intermediate the tension section and the compression section. The quotient of the bottom to top tooth pitch ratio of the belt construction is approximately 1.40 and the quotient of the bottom to top tooth depth ratio thereof is approximately 1.77 while the quotient of the belt thickness to flex thickness ratio thereof is approximately 3.98.