Half gear tensioning feedway
Technical field:
Used laminator when the present invention relates to electronic product pad pastings such as mobile phone, MP3 relates to the tensioning feedway that uses on a kind of laminator in particular.
Background technology:
Laminator is in work, film need be attached to mobile phone, on the electronic product shell such as MP3, this time, used film all was a rolling, leaning on conveying mechanism that film is carried up for laminator uses, feedway comprises a casing, two rotating cylinders that are installed in the casing, one is drive roll in two cylinders, be used for being connected with engine installation, power is provided, another is driven cylinder, rotation by the drive roll band, driven cylinder is hinged on the support, and support is fixed on the rotary axle, make driven cylinder to rotate around axle, be film to be placed in the middle of two cylinders when carrying, utilizing two cylinders that film is clamped back roll rotates, the drive film moves forward, and the size of the power of two cylinder clamping films is to need to adjust, gripping power is excessive, film can be pressed from both sides badly, and gripping power is too small, then cannot carry out the conveying of film, fixing device is all arranged on feedway, generally all is a transmission shaft, has two eccentric wheel above, utilize eccentric center principle to realize extruding to flower wheel, provide gripping power, but fixing device is when providing tensile force like this, stable inadequately, can become flexible along with reasons such as vibration produce, make the tensile force that acts on the driven cylinder change.
Summary of the invention:
The purpose of this invention is to provide a kind of half gear tensioning feedway, it can be simply, fast speed is adjusted tensile force and can in use kept position, the not phenomenon that can become flexible again.
Technology solution of the present invention is as follows:
Half gear tensioning feedway comprises casing, and return idler, driving roller and transmission shaft are installed in the casing, and the end of described driving roller is fixed with a drive pulley, is fixed with two eccentric wheel on the described transmission shaft; Also be fixed with half gear that half teeth is arranged on the outer circumference surface on the described transmission shaft, described casing also has a rotating shaft, free-running fit is equipped with half gear card handle in this rotating shaft, the front end of this half gear card handle has a protrusion that can insert in the teeth of described half gear, and this protrusion upper surface has a dip plane.
Described half gear tensioning feedway, the end of described transmission shaft is fixed with a turning handle.
Described half gear tensioning feedway, described half gear is fixed on the described transmission shaft by two pins.
Beneficial effect of the present invention is:
Tensioning feedway of the present invention can either be regulated tensile force and can in use keep position, the not phenomenon that can become flexible again; The front end of half gear card handle has a protrusion, the upper surface of protrusion has a dip plane, the teeth on half gear can be blocked in this dip plane, therefore be called half gear card handle, the card handle is installed in the fixing rotating shaft of another root, because hole and rotating shaft on the card handle are free-running fits, the card handle can pivot for stirring by the people, discharges half gear, and two eccentric wheel are installed at the transmission shaft two ends, the main effect of transmission shaft, be to be used for the eccentric position that install at the actuating spindle two ends, when eccentric wheel rotates to when two rollers are compressed, the teeth on half gear will be blocked by the protrusion of card handle front end, transmission shaft is fixed, thereby has fixed eccentric position.On the half circumference of gear surface, the geared surface area is big more, and the angle adjustable scope of transmission shaft is just big more, and the number of teeth is carried manyly on the equal area, and the angle precision of adjusting S. A. is just high more.This can be determined according to actual conditions, half is arranged on the present invention's half circumference of gear is the dentation that teeth are arranged, make transmission shaft can be fixed on the interior any angular position of 180 degree scopes, utilize this effect of transmission shaft, come the position of rotation of adjusting eccentric, thereby reach the effect of the gripping power of regulating two rollers.
When transmission shaft rotates to first tooth when being blocked handle and blocking along a direction, because card handle structure design, transmission shaft can continue to rotate along direction, but can not turn round by reversing sense, after transmission shaft is stuck, continue rotation again, will increase the gripping power of two rollers, when rotating to last tooth when being stuck, gripping power is maximum.When the card handle discharges gear when blocking gear if desired, the other end that then will block handle just can discharge transmission shaft to pressing down, and allows the transmission shaft state that affranchises, two rollers also the while released.
Description of drawings:
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a schematic perspective view of the present invention;
Fig. 3 is another schematic perspective view of the present invention;
Fig. 4 is the structural representation of the present invention's half gear;
Fig. 5 is the structural representation of the present invention's half gear card handle.
The specific embodiment:
The following stated is preferred embodiment of the present invention only, is not that scope of the present invention is limited.
Embodiment sees accompanying drawing 1~5; Half gear tensioning feedway comprises casing 1, and return idler 2, driving roller 3 and transmission shaft 4 are installed in the casing, and the end of described driving roller is fixed with a drive pulley 5, is fixed with two eccentric wheel 6 on the described transmission shaft; Also be fixed with half gear 7 that half teeth 7a is arranged on the outer circumference surface on the described transmission shaft, described casing also has a rotating shaft 8, free-running fit is equipped with half gear card handle 9 in this rotating shaft 8, the size in gap can free be rotated in rotating shaft with half gear card handle and is advisable, the front end of this half gear card handle has a protrusion 9a that can insert in the teeth 7a of described half gear, and this protrusion upper surface has a dip plane 9b.This dip plane has guaranteed that half gear can only be to the rotation of direction, and can not turn round, because rotating the time, the base plane that can be highlighted the 9a of portion is blocked.
The end of described transmission shaft is fixed with a turning handle 10.
Described half gear is fixed on the described transmission shaft by two pins 11.Two and half gears have two pin-and-holes, and two pin one ends are inserted in these two pin-and-holes, and the other end is fixed on the transmission shaft, so just half gear has been fixed on the transmission shaft.